Ari Laaksonen

The jump in global temperatures in September 2023 is extremely unlikely due to internal climate variability alone

Rantanen, Mika; Laaksonen, Ari. 2024. npj climate and atmospheric science. 7: . 34 A1 Journal article (refereed), original research

Water Vapor Adsorption–Desorption Hysteresis Due to Clustering of Water on Nonporous Surfaces

Viisanen, Yrjö; Lbadaoui-Darvas, Maria; Alvarez Piedehierro, Ana; Welti, André; Nenes, Athanasios; Laaksonen, Ari. 2024. Langmuir. 40: 20311-20321 A1 Journal article (refereed), original research

African dust transport and deposition modelling verified through a citizen science campaign in Finland

Meinander, Outi; Kouznetsov, Rostislav; Uppstu, Andreas; Sofiev, Mikhail; Kaakinen, Anu; Salminen, Johanna; Rontu, Laura; Welti, André; Francis, Diana; Piedehierro, Ana A; Heikkilä, Pasi; Heikkinen, Enna; Laaksonen, Ari. 2023. Scientific reports. 13: . 1186 A1 Journal article (refereed), original research

Deposition freezing, pore condensation freezing and adsorption: Three processes, one description?

Lbadaoui-Darvas, Mária; Laaksonen, Ari; Nenes, Athanasios. 2023. Atmospheric chemistry and physics. 23: 10057-10074 A1 Journal article (refereed), original research

The molecular scale mechanism of deposition ice nucleation on silver iodide

Roudsari, Golnaz; Lbadaoui-Darvas, Mária; Welti, André; Nenes, Athanasios; Laaksonen, Ari. 2023. Environmental science : atmospheres. 2024; 4: 243-251 A1 Journal article (refereed), original research

Heterogeneous iodine-organic chemistry fast-tracks marine new particle formation

Huang, Ru-Jin; Hoffmann, Thorsten; Ovadnevaite, Jurgita; Laaksonen, Ari; Kokkola, Harri; Xu, Wen; Xu, Wei; Ceburnis, Darius; Zhang, Renyi; Seinfeld, John H.; O’Dowd, Colin. 2022. Proceedings of the National Academy of Sciences of the United States of America. 119: . e2201729119 A1 Journal article (refereed), original research

Nucleation of Water: From Fundamental Science to Atmospheric and Additional Applications

Laaksonen, Ari; Malila, Jussi. 2022. . . Elsevier C1 Book

Particle emissions from a modern heavy-duty diesel engine as ice nuclei in immersion freezing mode: a laboratory study on fossil and renewable fuels

Korhonen, Kimmo; Kristensen, Thomas Bjerring; Falk, John; Malmborg, Vilhelm B; Eriksson, Axel; Gren, Louise; Novakovic, Maja; Shamun, Sam; Karjalainen, Panu; Markkula, Lassi; Pagels, Joakim; Svenningsson, Birgitta; Tunér, Martin; Komppula, Mika; Laaksonen, Ari; Virtanen, Annele. 2022. Atmospheric chemistry and physics. 22: 1615-1631 A1 Journal article (refereed), original research

The Arctic has warmed nearly four times faster than the globe since 1979

Rantanen, Mika; Karpechko, Alexey Yu; Lipponen, Antti; Nordling, Kalle; Hyvärinen, Otto; Ruosteenoja, Kimmo; Vihma, Timo; Laaksonen, Ari. 2022. Communications earth & environment. 3: . 168 A1 Journal article (refereed), original research

Ice nucleation on surrogates of boreal forest SOA particles: effect of water content and oxidative age

Piedehierro, Ana A; Welti, Andre; Buchholz, Angela; Korhonen, Kimmo; Pullinen, Iida; Summanen, Ilkka; Virtanen, Annele; Laaksonen, Ari. 2021. Atmospheric chemistry and physics. 21: 11069-11078 A1 Journal article (refereed), original research

Heterogeneous nucleation of water vapor on different types of black carbon particles

Laaksonen, Ari; Malila, Jussi; Nenes, Athanasios. 2020. Atmospheric chemistry and physics. 20: 13579-13589 A1 Journal article (refereed), original research

SPIN modification for low-temperature experiments

Welti, André; Korhonen, Kimmo; Miettinen, Pasi; Piedehierro, Ana A; Viisanen, Yrjö; Virtanen, Annele; Laaksonen, Ari. 2020. Atmospheric measurement techniques. 13: 7059-7067 A1 Journal article (refereed), original research

The road weather model RoadSurf (v6.60b) driven by the regional climate model HCLIM38: evaluation over Finland

Toivonen, Erika; Hippi, Marjo; Korhonen, Hannele; Laaksonen, Ari; Kangas, Markku; Pietikäinen, Joni-Pekka. 2019. Geoscientific model development. 12: 3481-3501 A1 Journal article (refereed), original research

Global analysis of continental boundary layer new particle formation based on long-term measurements

Nieminen, Tuomo; Kerminen, Veli-Matti; Petäjä, Tuukka; Aalto, Pasi P; Arshinov, Mikhail; Asmi, Eija; Baltensperger, Urs; Beddows, David C S; Beukes, Johan Paul; Collins, Don; Ding, Aijun; Harrison, Roy M; Henzing, Bas; Hooda, Rakesh; Hu, Min; Horrak, Urmas; Kivekäs, Niku; Komsaare, Kaupo; Krejci, Radovan; Kristensson, Adam; et al. [Incl. Laaksonen, Ari; Virtanen Annele]. 2018. Atmospheric chemistry and physics. 18: 14737-14756 A1 Journal article (refereed), original research

Identification of new particle formation events with deep learning

Joutsensaari, Jorma; Ozon, Matthew; Nieminen, Tuomo; Mikkonen, Santtu; Lähivaara, Timo; Decesari, Stefano; Facchini, M Cristina; Laaksonen, Ari; Lehtinen, Kari EJ. 2018. Atmospheric chemistry and physics. 18: 9597-9615 A1 Journal article (refereed), original research

Estimation of atmospheric particle formation rates through an analytical formula: validation and application in Hyytiälä and Puijo, Finland

Baranizadeh Elham, Nieminen Tuomo, Yli-Juuti Taina, Kulmala Markku, Petaja Tuukka, Leskinen Ari, Komppula Mika, Laaksonen Ari, Lehtinen Kari EJ. 2017. Atmospheric chemistry and physics. 17: 13361-13371 A1 Journal article (refereed), original research

Increasing large scale windstorm damage in Western, Central and Northern European forests, 1951-2010

Gregow H, Laaksonen A, Alper ME. 2017. Scientific reports. 7: 46397 A1 Journal article (refereed), original research

Sources of particulate organic nitrates in the boreal forest in Finland

Kortelainen A, Hao L, Tiitta P, Jaatinen A, Miettinen P, Kulmala M, Smith JN, Laaksonen A, Worsnop DR, Virtanen A. 2017. Boreal environment research. 22: 13-26 A1 Journal article (refereed), original research

Surface tension prevails over solute effect in organic-influenced cloud droplet activation

Ovadnevaite Jurgita, Zuend Andreas, Laaksonen Ari, Sanchez Kevin J, Roberts Greg, Ceburnis Darius, Decesari Stefano, Rinaldi Matteo, Hodas Natasha, Facchini Maria Cristina, Seinfeld John H, O'Dowd Colin. 2017. Nature. 546: 637-641 A1 Journal article (refereed), original research

An adsorption theory of heterogeneous nucleation of water vapour on nanoparticles

Laaksonen A, Malila J. 2016. Atmospheric chemistry and physics. 16: 135-143 A1 Journal article (refereed), original research

Herbivory by an outbreaking moth increases emissions of biogenic volatiles and leads to enhanced secondary organic aerosol formation capacity

Yli-Pirilä Pasi, Copolovici Lucian, Kännaste Astrid, Noe Steffen, Blande James D, Mikkonen Santtu, Klemola Tero, Pulkkinen Juha, Virtanen Annele, Laaksonen Ari, Joutsensaari Jorma, Niinemets Ülo, Holopainen Jarmo K. 2016. Environmental science and technology. 50: 11501-11510 A1 Journal article (refereed), original research

High concentrations of sub-3nm clusters and frequent new particle formation observed in the Po Valley, Italy, during the PEGASOS 2012 campaign

Kontkanen Jenni, Järvinen Emma, Manninen Hanna E., Lehtipalo Katrianne, Kangasluoma Juha, Decesari Stefano, Gobbi Gian Paolo, Laaksonen Ari, Petäjä Tuukka, Kulmala Markku. 2016. Atmospheric chemistry and physics. 16: 1919-1935 A1 Journal article (refereed), original research

Hygroscopicity of nanoparticles produced from homogeneous nucleation in the CLOUD experiments

Kim J, Ahlm L , Yli-Juuti T, Lawler M, Keskinen H, Tröestl J, Schobesberger S, Duplissy J, Amorim A, Bianchi F, Donahue NM, Flagan RC, Hakala J, Heinritzi M, Jokinen T, Kuerten A, Laaksonen A, Lehtipalo K, Miettinen P, Petäjä T et al. 2016. Atmospheric chemistry and physics. 16: 293-304 A1 Journal article (refereed), original research

Implementation of state-of-the-art ternary new-particle formation scheme to the regional chemical transport model PMCAMx-UF in Europe

Baranizadeh Elham, Murphy Benjamin N, Julin Jan, Falahat Saeed, Reddington Carly L, Arola Antti, Ahlm Lars, Mikkonen Santtu, Fountoukis Christos, Patoulias David, Minikin Andreas, Hamburger Thomas, Laaksonen Ari, Pandis Spyros N, Vehkamäki Hanna, Lehtinen Kari EJ, Riipinen Ilona. 2016. Geoscientific model development. 9: 2741-2754 A1 Journal article (refereed), original research

Ion-induced nucleation of pure biogenic particles

Kirkby Jasper, Duplissy Jonathan, Sengupta Kamalika, Frege Carla, Gordon Hamish, Williamson Christina, Heinritzi Martin, Simon Mario, Yan Chao, Almeida Joäo, Tröstl Jasmin, Nieminen Tuomo, Ortega Ismael K, Wagner Robert, Adamov Alexey, Amorim Antonio, Bernhammer Anne-Kathrin, Bianchi Federico, Breitenlechner Martin, Brilke Sophia et al. 2016. Nature. 533: 521-526 A1 Journal article (refereed), original research

Modeling the thermodynamics and kinetics of sulfuric acid-dimethylamine-water nanoparticle growth in the CLOUD chamber

Ahlm L, Yli-Juuti T, Schobesberger S, Praplan AP, Kim J, Tikkanen O-P, Lawler MJ, Smith JN, Tröstl J, Acosta Navarro JC, Baltensperger U, Bianchi F, Donahue NM, Duplissy J, Franchin A, Jokinen T, Keskinen H, Kirkby J, Kürten A, Laaksonen A et al. 2016. Aerosol science and technology. 50: 1017-1032 A1 Journal article (refereed), original research

Reduced anthropogenic aerosol radiative forcing caused by biogenic new particle formation

Gordon Hamish, Sengupta Kamalika, Rap Alexandru, Duplissy Jonathan, Frege Carla, Williamson Christina, Heinritzi Martin, Simon Mario, Yan Chao, Almeida João, Tröstl Jasmin, Nieminen Tuomo, Ortega Ismael K, Wagner Robert, Dunne Eimear M, Adamov Alexey, Amorim Antonio, Bernhammer Anne-Kathrin, Bianchi Federico, Breitenlechner Martin et al. 2016. Proceedings of the National Academy of Sciences of the United States of America. 113: 12053-12058 A1 Journal article (refereed), original research

Surface fractal dimension, water adsorption efficiency, and cloud nucleation activity of insoluble aerosol

Laaksonen A, Malila J, Nenes A, Hung HM, Chen, JP. 2016. Scientific reports. 6: 25504 A1 Journal article (refereed), original research

The effect of acid-base clustering and ions on the growth of atmospheric nano-particles

Lehtipalo Katrianne, Rondo Linda, Kontkanen Jenni, Schobesberger Siegfried, Jokinen Tuija, Sarnela Nina, Kürten Andreas, Ehrhart Sebastian, Franchin Alessandro, Nieminen Tuomo, Riccobono Francesco, Sipilä Mikko, Yli-Juuti Taina, Duplissy Jonathan, Adamov Alexey, Ahlm Lars, Almeida Joäo, Amorim Antonio, Bianchi Federico, Breitenlechner Martin et al. 2016. Nature communications. 7: 11594 A1 Journal article (refereed), original research

The role of low-volatility organic compounds in initial particle growth in the atmosphere

Tröstl Jasmin, Chuang Wayne K, Gordon Hamish, Heinritzi Martin, Yan Chao, Molteni Ugo, Ahlm Lars, Frege Carla, Bianchi Federico, Wagner Robert, Simon Mario, Lehtipalo Katrianne, Williamson Christina, Craven Jill S, Duplissy Jonathan, Adamov Alexey, Almeida Joao, Bernhammer Anne-Kathrin, Breitenlechner Martin, Brilke Sophia et al.. 2016. Nature. 533: 527-531 A1 Journal article (refereed), original research

Ubiquity of organic nitrates from nighttime chemistry in the European submicron aerosol

Kiendler-Scharr A, Mensah AA, Friese E, Topping D, Nemitz E, Prevot ASH, Äijälä M, Allan J, Canonaco F, Canagaratna M, Carbone S, Crippa M, Dall Osto M, Day DA, De Carlo P, Di Marco CF, Elbern H, Eriksson A, Freney E, Hao L et al. 2016. Geophysical research letters. [epub ahead of print 20 July2016]: 1-10 A1 Journal article (refereed), original research

A unifying model for adsorption and nucleation of vapors on solid surfaces

Laaksonen Ari. 2015. Journal of physical chemistry a. 119: 3736-3745 A1 Journal article (refereed), original research

Adsorptive uptake of water by semisolid secondary organic aerosols

Pajunoja Aki, Lambe Andrew T, Hakala Jani, Rastak Narges, Cummings Molly J, Brogan James F, Hao Liqing, Paramonov Mikhail, Hong Juan, Prisle Nonne L, Malila Jussi, Romakkaniemi Sami, Lehtinen Kari EJ, Laaksonen Ari, Kulmala Markku, Massoli Paola, Onasch Timothy B, Donahue Neil M, Riipinen Ilona, Davidovits Paul et al. 2015. Geophysical research letters. 42: 3063-3068 A1 Journal article (refereed), original research

Biotic stress accelerates formation of climate-relevant aerosols in boreal forests

Joutsensaari J, Yli-Pirilä P, Korhonen H, Arola A, Blande JD, Heijari J, Kivimäenpää M, Mikkonen S, Hao L, Miettinen P, Lyytikäinen-Saarenmaa, Faiola CL, Laaksonen A, Holopainen JK. 2015. Atmospheric chemistry and physics. 15: 12139-12157 A1 Journal article (refereed), original research

CCN activation of fumed silica aerosols mixed with soluble pollutants

Dalirian M, Keskinen H, Ahlm L, Ylisirniö A, Romakkaniemi S, Laaksonen A, Virtanen A, Riipinen I. 2015. Atmospheric chemistry and physics. 15: 3815-3829 A1 Journal article (refereed), original research

Communication: Kinetics of scavenging of small, nucleating clusters: First nucleation theorem and sum rules

Malila Jussi, McGraw Robert, Laaksonen Ari, Lehtinen Kari E J. 2015. Journal of chemical physics. 142: 11102 A1 Journal article (refereed), original research

Geographical and diurnal features of amine-enhanced boundary layer nucleation

Bergman T, Laaksonen A, Korhonen H, Malila J, Dunne EM, Mielonen T, Lehtinen KEJ, Kühn T, Arola A, Kokkola H. 2015. Journal of geophysical research : atmospheres. 120: 9606-9624 A1 Journal article (refereed), original research

Impacts of emission reductions on aerosol radiative effects

Pietikäinen J-P, Kupiainen K, Klimont Z, Makkonen R, Korhonen H, Karinkanta R, Hyvärinen A-P, Karvosenoja N, Laaksonen A, Lihavainen H, Kerminen V-M. 2015. Atmospheric chemistry and physics. 15: 5501-5519 A1 Journal article (refereed), original research

Implementation of the CORINE land use classification in the regional climate model REMO

Gao Yao, Weiher Stefan, Markkanen Tiina, Pietikäinen Joni-Pekka, Gregow Hilppa, Henttonen Helena M, Jacob Daniela, Laaksonen Ari. 2015. Boreal environment research. 20: 261-282 A1 Journal article (refereed), original research

On the composition of ammonia-sulfuric-acid ion clusters during aerosol particle formation

Schobesberger S, Franchin A, Bianchi F, Rondo L, Duplissy J, Kürten A, Ortega IK, Metzger A, Schnitzhofer R, Almeida J, Amorim A, Dommen J, Dunne EM, Ehn M, Gagné S, Ickes L, Junninen H, Hansel A, Kerminen V-M, Kirkby J et al. 2015. Atmospheric chemistry and physics. 15: 55-78 A1 Journal article (refereed), original research

Real-Time Chemical Composition Analysis of Particulate Emissions from Woodchip Combustion

Kortelainen Aki, Joutsensaari Jorma, Hao Liqing, Leskinen Jani, Tiitta Petri, Jaatinen Antti, Miettinen Pasi, Sippula Olli, Torvela Tiina, Tissari Jarkko, Jokiniemi Jorma, Worsnop Douglas R., Smith James N., Laaksonen Ari, Virtanen Annele. 2015. Energy and fuels. 29: 1143-1150 A1 Journal article (refereed), original research

Aerosol Liquid Water Driven by Anthropogenic Nitrate: Implications for Lifetimes of Water-Soluble Organic Gases and Potential for Secondary Organic Aerosol Formation

Hodas Natasha, Sullivan Amy P, Skog Kate, Keutsch Frank N, Collett Jeffrey L Jr, Decesari Stefano, Facchini M Cristina, Carlton Annmarie G, Laaksonen Ari, Turpin Barbara J. 2014. Environmental science and technology. 48: 11127-11136 A1 Journal article (refereed), original research

Ammonium nitrate evaporation and nitric acid condensation in DMT CCN counters

Romakkaniemi Sami, Jaatinen Antti, Laaksonen Ari, Nenes Athanasios, Raatikainen Tomi. 2014. Atmospheric measurement techniques. 7: 1377-1384 A1 Journal article (refereed), original research

Analysis of nucleation events in the European boundary layer using the regional aerosol-climate model REMO-HAM with a solar radiation-driven OH-proxy

Pietikäinen Joni-Pekka, Mikkonen Santtu, Hamed Amar, Hienola Anca I, Birmili Wolfram, Kulmala Markku, and Laaksonen Ari. 2014. Atmospheric chemistry and physics. 14: 11711-11729 A1 Journal article (refereed), original research

Atmospheric submicron aerosol composition and particulate organic nitrate formation in a boreal forestland-urban mixed region

Hao Liqing, Kortelainen Aki, Romakkaniemi Sami, Portin Harri, Jaatinen Antti, Leskinen Ari, Komppula Mika, Miettinen Pasi, Sueper Donna, Pajunoja Aki, Smith James N, Lehtinen Kari E J, Worsnop Douglas R, Laaksonen Ari, Virtanen Annele. 2014. Atmospheric chemistry and physics. 14: 13483-13495 A1 Journal article (refereed), original research

Biogeophysical impacts of peatland forestation on regional climate changes in Finland

Gao Y, Markkanen T, Backman L, Henttonen H M, Pietikäinen Joni-Pekka, Mäkelä Hanna M, Laaksonen Ari. 2014. BIOGEOSCIENCES. 11: 7251-7267 A1 Journal article (refereed), original research

Chemical composition, main sources and temporal variability of PM 1 aerosols in southern African grassland

Tiitta P, Vakkari V, Croteau P, Beukes JP, van Zyl PG, Josipovic M, Venter AD, Jaars K, Pienaar JJ, Ng NL, Canagaratna MR, Jayne JT, Kerminen V-M, KokkolaH, Kulmala M, Laaksonen A, Worsnop DR, Laakso L. 2014. Atmospheric chemistry and physics. 14: 1909-1927 A1 Journal article (refereed), original research

Climate impacts of changing aerosol emissions since 1996

Kühn Thomas, Partanen Antti-Ilari, Laakso Anton, Lu Z, Bergman Tommi, Mikkonen Santtu, Kokkola Harri, Korhonen Hannele, Räisänen Petri, Streets D G, Romakkaniemi Sami, Laaksonen Ari. 2014. Geophysical research letters. 41: 4711-4718 A1 Journal article (refereed), original research

Comment on "Changes in Droplet Surface Tension Affect the Observed Hygroscopicity of Photochemically Aged Biomass Burning Aerosol"

Raatikainen Tomi, Laaksonen Ari. 2014. Environmental science and technology. 48: 2082-2083 A1 Journal article (refereed), original research

Evaluation of North Eurasian snow-off dates in the ECHAM5.4 atmospheric general circulation model

Räisänen P, Luomaranta A, Järvinen H, Takala M, Jylhä K, Bulygina O N, Luojus K, Riihelä A, Laaksonen Ari, Koskinen J, Pulliainen J. 2014. Geoscientific model development. 7: 3037-3057 A1 Journal article (refereed), original research

Finnish Centre of Excellence in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change: summary and outlook

Kulmala Markku, Lappalainen Hanna K, Bäck Jaana, Laaksonen Ari, Nikinmaa E, Riekkola M-L, Vesala Timo, Viisanen Yrjö, Aalto T, Boy M, Dal Maso Miikka, Ehn Mikael, Hakola Hannele, Hari P, Hartonen K, Hämeri Kaarle, Hölttä T, Junninen Heikki, Järvi Leena, Kurten Theo, et al.. 2014. Boreal environment research. 19: 2-19 A1 Journal article (refereed), original research

Have tropospheric aerosol emissions contributed to the recent climate hiatus?

Kühn Thomas, Partanen Antti-Ilari, Laakso Anton, Lu Zifeng, Bergman Tommi, Mikkonen Santtu, Kokkola Harri, Korhonen Hannele, Räisänen Petri, Streets David G, Romakkaniemi Sami, and Laaksonen Ari. 2014. Geophysical Research Abstracts

Hygroscopic and chemical characterisation of Po Valley aerosol

Bialek J, Dall Osto M, Vaattovaara Petri, Decesari S, Ovadnevaite J, Laaksonen Ari, O'Dowd Colin. 2014. Atmospheric chemistry and physics. 14: 1557-1570 A1 Journal article (refereed), original research

Improved power-law estimates from multiple samples provided by millennium climate simulations

Henriksson Svante V, Räisänen Petri, Silen J, Järvinen Heikki, Laaksonen Ari. 2014. Theoretical and applied climatology. 119: 667-677 A1 Journal article (refereed), original research

Increased hygroscopicity of Arizona Test Dust seeds by secondary organic aerosol coating from Increased hygroscopicity of Arizona Test Dust seeds by secondary organic alfa-pinene ozonolysis

Keskinen Helmi, Kortelainen Aki-Matti, Jaatinen Antti, Yli-Pirilä Pasi, Joutsensaari Jorma, Romakkaniemi Sami, Hao Liqing, Torvela Tiina, Miettinen Pasi, Virtanen Annele, Worsnop Douglas R, Laaksonen Ari, Smith James N. 2014. Boreal environment research. 19: 182-190 A1 Journal article (refereed), original research

Increasing trend in the average temperature in Finland, 1847-2012

Mikkonen Santtu, Laine Marko, Mäkelä Hanna M, Gregow Hilppa, Tuomenvirta Heikki, Lahtinen Matti, and Laaksonen Ari. 2014. Geophysical Research Abstracts

Insight into Acid-Base Nucleation Experiments by Comparison of the Chemical Composition of Positive, Negative, and Neutral Clusters

Bianchi Federico, Praplan Arnaud P, Sarnela Nina, Dommen Josef, Kürten Andreas, Ortega Ismael K, Schobesberger Siegfried, Junninen Heikki, Simon Mario, Tröstl Jasmin, Jokinen Tuija, Sipilä Mikko, Adamov Alexey, Amorim Antonio, Almeida Joao, Breitenlechner Martin, Duplissy Jonathan, Ehrhart Sebastian, Flagan Richard C, et al.. 2014. Environmental science and technology. 48: 13675-13684 A1 Journal article (refereed), original research

Multimodel estimates of the changes in the Baltic Sea ice cover during the present century

Luomaranta Anna, Ruosteenoja Kimmo, Jylha Kirsti, Gregow Hilppa, Haapala Jari, Laaksonen Ari. 2014. Tellus series a: dynamic meteorology and oceanography. 66: 22617 A1 Journal article (refereed), original research

Neutral molecular cluster formation of sulfuric acid-dimethylamine observed in real time under atmospheric conditions

Kürten Andreas, Jokinen Tuija, Simon Mario, Sipilä Mikko, Sarnela Nina, Junninen Heikki, Adamov Alexey, Almeida João, Amorim Antonio, Bianchi Federico, Breitenlechner Martin, Dommen Josef, Donahue Neil M, Duplissy Jonathan, Ehrhart Sebastian, Flagan Richard C, Franchin Alessandro, Hakala Jani, Hansel Armin, Heinritzi Martin, et al.. 2014. Proceedings of the National Academy of Sciences of the United States of America. 111: 15019-15024 A1 Journal article (refereed), original research

Observing wind, aerosol particles, cloud and precipitation: Finland's new ground-based remote-sensing network

Hirsikko Anne, O'Connor E J, Komppula Mika, Korhonen Kimmo, Pfüller Anne, Giannakaki Eleni, Wood C R, Bauer-Pfundstein M, Poikonen A, Karppinen T, Lonka H, Kurri M, Heinonen J, Moisseev D, Asmi Eija, Aaltonen V, Nordbo Annika, Rodriguez E, Lihavainen Heikki, Laaksonen Ari, Lehtinen Kari E J, Laurila T, Petäjä Tuukka, Kulmala Markku, Viisanen Yrjö. 2014. Atmospheric measurement techniques. 7: 1351-1375 A1 Journal article (refereed), original research

Organic aerosol components derived from 25 AMS data sets across Europe using a consistent ME-2 based source apportionment approach

Crippa M, Canonaco F, Lanz V A, Äijälä M, Allan J D, Carbone S, Capes G, Ceburnis D, Dall'Osto M, Day D A, DeCarlo P F, Ehn M, Eriksson A, Freney E, Hildebrandt Ruiz L, Hillamo R, Jimenez J L, Junninen H, Kiendler-Scharr A, Kortelainen Aki-Matti, et. al.. 2014. Atmospheric chemistry and physics. 14: 6159-6176 A1 Journal article (refereed), original research

Oxidation Products of Biogenic Emissions Contribute to Nucleation of Atmospheric Particles

Riccobono Francesco, Schobesberger Siegfried, Scott Catherine E, Dommen Josef, Ortega Ismael K, Rondo Linda, Almeida João, Amorim Antonio, Bianchi Federico, Breitenlechner Martin, David André, Downard Andrew, Dunne Eimear M, Duplissy Jonathan, Ehrhart Sebastian, Flagan Richard C, Franchin Alessandro, Hansel Armin, Junninen Heikki, Kajos Maija, Keskinen Helmi et al. 2014. Science. 344: 717-721 A1 Journal article (refereed), original research

Reallocation in modal aerosol models: impacts on predicting aerosol radiative effects

Korhola Tapani, Kokkola Harri, Korhonen Hannele, Partanen Antti-Ilari, Laaksonen Ari, Lehtinen Kari E J, Romakkaniemi Sami. 2014. Geoscientific model development. 7: 161-174 A1 Journal article (refereed), original research

Representing situational knowledge acquired from sensor data for atmospheric phenomena

Stocker Markus, Baranizadeh Elham, Portin Harri, Komppula Mika, Rönkkö Mauno, Hamed Amar, Virtanen Annele, Lehtinen Kari, Laaksonen Ari, Kolehmainen Mikko. 2014. Environmental modelling and software. 58: 27-47 A1 Journal article (refereed), original research

Spatial distributions and seasonal cycles of aerosol climate effects in India seen in a global climate-aerosol model

Henriksson Svante V, Pietikäinen Joni-Pekka, Hyvärinen Antti-Pekka, Räisänen Petri, Kupiainen K, Tonttila Juha, Hooda R, Lihavainen Heikki, O'Donnell Declan, Backman L, Klimont Z, Laaksonen Ari. 2014. Atmospheric chemistry and physics. 14: 10177-10192 A1 Journal article (refereed), original research

The effect of cloudiness on new-particle formation: investigation of radiation levels

Baranizadeh Elham, Arola Antti, Hamed Amar, Nieminen Tuomo, Mikkonen Santtu, Virtanen Annele, Kulmala Markku, Lehtinen Kari, Laaksonen Ari. 2014. Boreal environment research. 19: 343-354 A1 Journal article (refereed), original research

The effect of local sources on particle size and chemical composition and their role in aerosol-cloud interactions at Puijo measurement station

Portin Harri, Leskinen Ari, Hao Liqing, Kortelainen Aki, Miettinen Pasi, Jaatinen Antti, Laaksonen Ari, Lehtinen Kari E J, Romakkaniemi Sami, Komppula Mika. 2014. Atmospheric chemistry and physics. 14: 6021-6034 A1 Journal article (refereed), original research

The third Pallas Cloud Experiment: Consistency between the aerosol hygroscopic growth and CCN activity

Jaatinen Antti, Romakkaniemi Sami, Anttila Tatu, Hyvärinen Antti-Pekka, Hao Liqing, Kortelainen Aki, Miettinen Pasi, Mikkonen Santtu, Smith James N, Virtanen Annele, Laaksonen Ari. 2014. Boreal environment research. 19: 368-382 A1 Journal article (refereed), original research

Trends in the average temperature in Finland, 1847-2013

Mikkonen Santtu, Laine Marko, Mäkelä Hanna M, Gregow Hilppa, Tuomenvirta Heikki, Lahtinen Matti, Laaksonen Ari. 2014. Stochastic environmental research and risk assessment. 29: 1521-1529 A1 Journal article (refereed), original research

A combined theory of heterogeneous nucleation and adsorption of vapors on solid surfaces

Laaksonen Ari. Teoksessa: DeMott, Paul J and O'Dowd, Colin D(toim.) , 2013. NUCLEATION AND ATMOSPHERIC AEROSOLS: 19th International Conference. s. 270-273. American Institute of Physics A4 Conference proceedings

Acquisition and Representation of Knowledge for Atmospheric New Particle Formation

Stocker Markus, Baranizadeh Elham, Hamed Amar, Rönkkö Mauno, Virtanen Annele, Laaksonen Ari, Portin Harri, Komppula Mika, Kolehmainen Mikko. Teoksessa: Hřebíček Jiří, Schimak Gerald, Kubásek Miroslav, Rizzoli Andrea E.(toim.) , 2013. Environmental Software Systems. Fostering Information Sharing. s. 98-108. Springer Gabler A3 Book section, Chapters in research books

Aerosol Chemical Composition in Cloud Events by High Resolution Time-of-Flight Aerosol Mass Spectrometry

L. Q. Hao, S. Romakkaniemi, A. Kortelainen, A. Jaatinen, H. Portin, P. Miettinen, M. Komppula, A. Leskinen, A. Virtanen, J.N. Smith, D. Sueper,D.R. Worsnop, K.E.J. Lehtinen and A. Laaksonen. 2013. Environmental science and technology. 47: 2645-2653 A1 Journal article (refereed), original research

Black carbon concentration and deposition estimations in Finland by the regional aerosol-climate model REMO-HAM

Hienola Anca I, Pietikäinen Joni-Pekka, Jacob D, Pozdun R, Petäjä Tuukka, Hyvärinen, Antti-Pekka, Sogacheva Larisa, Kerminen Veli-Matti, Kulmala Markku, Laaksonen, Ari. 2013. Atmospheric chemistry and physics. 13: 4033-4055 A1 Journal article (refereed), original research

Bounce characteristics of &#945 -pinene derived SOA particles with implications to physical phase

Kannosto Jonna, Yli-Pirilä Pasi, Hao Liqing, Leskinen Jani, Jokiniemi Jorma, Mäkelä Jyrki, Joutsensaari Jorma, Laaksonen Ari, Worsnop Douglas R, Keskinen Jorma, Virtanen Annele. 2013. Boreal environment research. 18: 329-340 A1 Journal article (refereed), original research

Direct Observations of Atmospheric Aerosol Nucleation

Kulmala Markku, Kontkanen Jenni, Junninen Heikki, Lehtipalo Katrianne, Manninen Hanna E, Nieminen Tuomo, Petäjä Tuukka, Sipilä Mikko, Schobesberger Siegfried, Rantala Pekka, Franchin Alessandro, Jokinen Tuija, Järvinen Emma, Äijälä Mikko, Kangasluoma Juha, Hakala Jani, Aalto Pasi P, Paasonen Pauli, Mikkilä Jyri, Vanhanen Joonas, et. al.. 2013. Science. 22: 943-946 A1 Journal article (refereed), original research

Effective aerosol optical depth from pyranometer measurements of surface solar radiation (global radiation) at Thessaloniki, Greece

Lindfors Anders V, Kouremeti N, Arola Antti, Kazadzis S, Bais A F, Laaksonen, Ari. 2013. Atmospheric chemistry and physics. 13: 3733-3741 A1 Journal article (refereed), original research

Effects of modal and sectional aerosol representations on aerosol activation and light extinction

Korhola Tapani, Kokkola Harri, Korhonen Hannele, Partanen Antti-Ilari, Laaksonen Ari, Romakkaniemi Sami. Teoksessa: DeMott, Paul J and O'Dowd, Colin D(toim.) , 2013. NUCLEATION AND ATMOSPHERIC AEROSOLS: 19th International Conference. s. 655-658. American Institute of Physics A4 Conference proceedings

Evolution of nanoparticle composition in CLOUD in presence of sulphuric acid, ammonia and organics

Keskinen Helmi, Virtanen Annele, Joutsensaari Jorma, Tsagkogeorgas G, Duplissy J, Schobesberger S, Gysel M, Riccobono F, Slowik JG, Bianchi F, Yli-Juuti T, Lehtipalo K, Rondo L, Breitenlechner M, Kupc A, Almeida J, Amorim A, Dunne EM, Downard A, Ehrhart S, et al.. Teoksessa: DeMott, Paul J and O'Dowd, Colin D(toim.) , 2013. NUCLEATION AND ATMOSPHERIC AEROSOLS: 19th International Conference. s. 291-294. American Institute of Physics A4 Conference proceedings

Evolution of particle composition in CLOUD nucleation experiments

Keskinen Helmi, Virtanen Annele, Joutsensaari Jorma, Tsagkogeorgas G, Duplissy J, Schobesberger S, Gysel M, Riccobono F, Slowik J G, Bianchi F, Yli-Juuti Taina, Lehtipalo Katrianne, Rondo L, Breitenlechner M, Kupc A, Almeida J, Amorim A, Dunne E M, Downard A J, Ehrhart S, Franchin A, et. al.. 2013. Atmospheric chemistry and physics. 13: 5587-5600 A1 Journal article (refereed), original research

Formation and growth of nucleated particles into cloud condensation nuclei: model-measurement comparison

Westervelt D M, Pierce J R, Riipinen Ilona, Trivitayanurak W, Hamed Amar, Kulmala Markku, Laaksonen Ari, Decesari S, Adams P J. 2013. Atmospheric chemistry and physics. 13: 7645-7663 A1 Journal article (refereed), original research

Long-term measurements of cloud droplet concentrations and aerosol-cloud interactions in continental boundary layer clouds

Ahmad Irshad, Mielonen Tero, Grosvenor Daniel P, Portin Harri J, Arola Antti, Mikkonen Santtu, Kühn Thomas, Leskinen Ari, Joutsensaari Jorma, Komppula Mika, Lehtinen Kari EJ, Laaksonen Ari, Romakkaniemi Sami. 2013. Tellus series b: chemical and physical meteorology. 65: 20138 A1 Journal article (refereed), original research

Molecular understanding of atmospheric particle formation from sulfuric acid and large oxidized organic molecules

Schobesberger Siegfried, Junninen Heikki, Bianchi Federico, Lönn Gustaf, Ehn Mikael, Lehtipalo Katrianne, Dommen Josef, Ehrhart Sebastian, Ortega Ismael K, Franchin Alessandro, Nieminen Tuomo, Riccobono Francesco, Hutterli Manuel, Duplissy Jonathan, Almeida João, Amorim Antonio, Breitenlechner Martin, Downard Andrew J, Dunne Eimear M, Flagan Richard C, et al.. 2013. Proceedings of the National Academy of Sciences of the United States of America. 110: 17223-17228 A1 Journal article (refereed), original research

Molecular understanding of sulphuric acid-amine particle nucleation in the atmosphere

Almeida João, Schobesberger Siegfried, Kürten Andreas, Ortega Ismael K, Kupiainen-Määttä Oona, PraplanArnaud P, Adamov Alexey, Amorim Antonio, Bianchi Federico, Breitenlechner Martin, David André, Dommen Josef, Donahue Neil M, Downard Andrew, Dunne Eimear, Duplissy Jonathan, Ehrhart Sebastian, Flagan Richard C, Franchin Alessandro, Guida Roberto, et. al.. 2013. Nature. 502: 359-363 A1 Journal article (refereed), original research

Particle size distribution measurements at Hada Al Sham, western Saudi Arabia

Hyvärinen A-P, Al-Jeelani H, Alghamdi M, Hussein T, Khodeir M, Lihavainen H, Kulmala Markku, Laaksonen Ari. Teoksessa: DeMott, Paul J and O'Dowd, Colin D(toim.) , 2013. NUCLEATION AND ATMOSPHERIC AEROSOLS: 19th International Conference. s. 602-605. American Institute of Physics B3 Non-refereed conference proceedings

Repairing the first nucleation theorem: Precritical cluster losses

Malila Jussi, McGraw R, Laaksonen Ari, Lehtinen Kari EJ. Teoksessa: DeMott, Paul J and O'Dowd, Colin D(toim.) , 2013. NUCLEATION AND ATMOSPHERIC AEROSOLS: 19th International Conference. s. 31-34. American Institute of Physics A4 Conference proceedings

Warming-induced increase in aerosol number concentration likely to moderate climate change

Paasonen Pauli, Asmi Ari, Petäjä Tuukka, Kajos Maija K, Äijälä Mikko, Junninen Heikki, Holst Thomas, Abbatt Jonathan P D, Arneth Almut, Birmili Wolfram, van der Gon Hugo Denier, Hamed Amar, Hoffer András, Laakso Lauri, Laaksonen Ari, Leaitch W Richard, Plass-Dülmer Christian, Pryor Sara C, Räisänen Petri, Swietlicki Erik, Wiedensohler Alfred, Worsnop Douglas R, Kerminen Veli-Matti, Kulmala Markku. 2013. Nature geoscience. 6: 438-442 A1 Journal article (refereed), original research

Biomass burning aerosols observed in Eastern Finland during the Russian wildfires in summer 2010 - Part 1: In-situ aerosol characterization

Portin Harri, Mielonen Tero, Leskinen Ari, Arola Antti, Pärjälä E, Romakkaniemi Sami, Laaksonen Ari, Lehtinen Kari E J, Komppula Mika. 2012. Atmospheric environment. 47: 269-278 A1 Journal article (refereed), original research

Brightening of the global cloud field by nitric acid and the associated radiative forcing

Makkonen Risto, Romakkaniemi Sami, Kokkola Harri, Stier P, Räisänen P, Rast S, Feichter J, Kulmala Markku, Laaksonen, Ari. 2012. Atmospheric chemistry and physics. 12: 7625-7633, A1 Journal article (refereed), original research

Climate effects of northern hemisphere volcanic eruptions in an Earth System Model

Meronen H, Henriksson Svante V, Räisänen Petri, Laaksonen Ari. 2012. Atmospheric research. 114-115: 107-118 A1 Journal article (refereed), original research

Cloud Condensation Nucleus Production from Nucleation Events at a Semi-Rural Environment: Puijo station, Eastern Finland

Amar Hamed, Mika Komppula, Harri Portin, Ari Leskinen, Sami Romakkaniemi, Kari Lehtinen, James Smith, Jorma Joutsensaari and Ari Laaksonen:. 2012.

Detecting random error in the cloud droplet probe measurement time series

Mikkonen Santtu, Portin Harri, Komppula Mika, Laaksonen Ari, Romakkaniemi Sami. Teoksessa: Markku Kulmala, Hanna K. Lappalainen, Michael Boy, Magdalena Brus and Tuomo Nieminen(toim.) , 2012. Proceedings of Finnish Center of Excellence in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change', and Nordic Center of Excellence in 'Cryosphere-Atmosphere Interactions in a Changing Arctic Climate' Annual Meetings 2012. s. 479-480. A4 Conference proceedings

Determination of the biogenic secondary organic aerosol fraction in the boreal forest by NMR spectroscopy

Finessi E, Decesari S, Paglione M, Giulianelli L, Carbone C, Gilardoni S, Fuzzi S, Saarikoski S, Raatikainen Tomi, Hillamo R, Allan J, Mentel Th F, Tiitta Petri, Laaksonen Ari, Petäjä Tuukka, Kulmala Markku, Worsnop D R, Facchini M C. 2012. Atmospheric chemistry and physics. 12: 941-959 A1 Journal article (refereed), original research

Effect of aerosol size distribution changes on AOD, CCN and cloud droplet concentration: Case studies from Erfurt and Melpitz, Germany

Romakkaniemi Sami, Arola Antti, Kokkola Harri, Birmili W, Tuch T, Kerminen Veli-Matti, Räisänen P, Smith James H, Korhonen Hannele, Laaksonen Ari. 2012. Journal of geophysical research. 117: D07202 A1 Journal article (refereed), original research

Humidity-dependent phase state of SOA particles from biogenic and anthropogenic precursors

Saukko Erkka, Lambe A T, Massoli P, Koop T, Wright J P, Croasdale D R, Pedernera D A, Onasch T B, Laaksonen Ari, Davidovits P, Worsnop Douglas R, Virtanen Annele. 2012. Atmospheric chemistry and physics. 12: 7517-7529 A1 Journal article (refereed), original research

On the formation of sulphuric acid - amine clusters in varying atmospheric conditions and its influence on atmospheric new particle formation

Paasonen P, Olenius T, Kupiainen O, KurténT, Petäjä T, Birmili W, Hamed A, Hu M, Huey LG, Plass-Duelmer C, Smith JN, Wiedensohler A, Loukonen V, McGrath MJ, Ortega IK, Laaksonen A, Vehkamäki H, Kerminen V-M, Kulmala M. 2012. Atmospheric chemistry and physics. 12: 9113-9133 A2 Review article, Literature review, Systematic review

Overview of the studies conducted by the UEF aerosol physics group

Laaksonen, A, Romakkaniemi, S., Joutsensaari, J,, Hamed, A., Malila, J, Ahmad, I., Baranizadeh, E., Hao, L, Jaatinen, A, Keskinen, H., Korhola, T., Kortelainen, A., Kuhn, T., Maalick, Z., Miettinen, P, Mikkonen, S., Pajuoja, A, Smith, J.N., Vaattovaara, P, Yli-Pirilä, P., Virtanen, A.. 2012. Report series in aerosol science. 134: 383-385 D1 Article in a trade journal

Overview of the studies conducted by the UEF aerosol physics group. Proceedings of Finnish Center of Excellence in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change', and Nordic Center of Excellence in 'Cryosphere-Atmosphere Interactions in a Changing Arctic Climate' Annual Meetings 2012, Editors: Markku Kul

Laaksonen, A., S. Romakkaniemi, J. Joutsensaari, A. Hamed, J. Malila, I. Ahmad, E. Baranizadeh, L. Hao, A. Jaatinen, H. Keskinen, T. Korhola, A. Kortelainen, T. Kuhn, Z. Maalick, P. Miettinen, S. Mikkonen, A. Pajuoja, J.N. Smith, P. Vaattovaara, P. Yli-Pirilä, A. Virtanen. 2012. Report series in aerosol science. 134: 83-92 D1 Article in a trade journal

Quasiperiodic climate variability with a period of 50-80 years: Fourier analysis of measurements and Earth System Model simulations

Henriksson Svante V, Räisänen Petri, Silén J, Laaksonen Ari. 2012. Climate dynamics. 2012: 1999-2011 A1 Journal article (refereed), original research

Radiatively Active Particles Formed on the Ice Melting Arctic Ocean

P. Vaattovaara, Z.D. Ristovski, M. Graus, M. Müller, L. Di Liberto, S. Sjögren, M. Karl, D. Orsini, C. Leck, A. Laaksonen. 2012.

Reducing measurement error of Cloud Droplet Probe with a statistical smoother

Mikkonen Santtu, Portin Harri, Komppula Mika, Laaksonen Ari, Romakkaniemi Sami. 2012.

Seasonal cycle and source analyses of aerosol optical properties in a semi-urban environment at Puijo station in Eastern Finland

Leskinen Ari, Arola Antti, Komppula Mika, Portin Harri, Tiitta Petri, Miettinen Pasi, Romakkaniemi Sami, Laaksonen Ari, Lehtinen Kari EJ. 2012. Atmospheric chemistry and physics. 12: 5647-5659 A1 Journal article (refereed), original research

Stratospheric passenger flights are likely an inefficient geoengineering strategy

Laakso Anton, Partanen Antti-Ilari, Kokkola Harri, Laaksonen Ari, Lehtinen Kari EJ and Korhonen Hannele. 2012. Environmental research letters. 7: 34021 A1 Journal article (refereed), original research

Surfactant effects in global simulations of cloud droplet activation

Prisle NL, Asmi, Ari, Topping D, Partanen Antti-Ilari, Romakkaniemi Sami, Dal Maso Miikka, Kulmala Markku, Laaksonen Ari, Lehtinen Kari EJ, McFiggans G, Kokkola H. 2012. Geophysical research letters. 39: - A1 Journal article (refereed), original research

The regional aerosol-climate model REMO-HAM

Pietikäinen Joni-Pekka, O'Donnell D, Teichmann C, Karstens U, Pfeifer S, Kazil J, Podzun R, Fiedler S, Kokkola Harri, Birmili Wolfram, O'Dowd Colin, Baltensperger U, Weingartner E, Gehrig R, Spindler G, Kulmala Markku, Feichter J, Jacob D, Laaksonen Ari. 2012. Geoscientific model development. 5: 1323-1339 A1 Journal article (refereed), original research

A simplified treatment of surfactant effects on cloud drop activation

Raatikainen Tomi & Laaksonen Ari. 2011. Geoscientific model development. 4: 107-116 A1 Journal article (refereed), original research

A statistical proxy for sulphuric acid concentration

Mikkonen Santtu, Romakkaniemi Sami, Smith James N, Korhonen Hannele, Petäjä Tuukka, Plass-Duelmer Christian, Boy Michael, McMurry Peter H, Lehtinen Kari EJ, Joutsensaari Jorma, Hamed Amar, Mauldin III RL, Birmili Wolfram, Spindler Gerald, Arnold Frank, Kulmala Markku, Laaksonen Ari. 2011. Atmospheric chemistry and physics. 11: 11319-11334 A1 Journal article (refereed), original research

Aerosol hygroscopicity and CCN activation kinetics in a boreal forest environment during the 2007 EUCAARI campaign

Cerully K M, Raatikainen Tomi, Lance S, Tkacik D, Tiitta Petri, Petäjä Tuukka, Ehn M, Kulmala Markku, Worsnop D R, Laaksonen Ari, Smith James N, Nenes A. 2011. Atmospheric chemistry and physics. 11: 12369-12386 A1 Journal article (refereed), original research

Biogenic organic ultrafine marine particles during SOAP

P.Vaattovaara, L.Cravigan, N.Talbot, G.Olivares, C.Law, M.Harvey, Z.Ristovski, A.Laaksonen. 2011.

Bounce behavior of freshly nucleated biogenic secondary organic aerosol particles

Virtanen Annele, Kannosto Jonna, Kuuluvainen H, Arffman A, Joutsensaari Jorma, Saukko E, Hao L, Yli-Pirilä Pasi, Tiitta Petri, Holopainen JK, Keskinen J, Worsnop DR, Smith JN, Laaksonen Ari. 2011. Atmospheric chemistry and physics. 11: 8759-8766 A1 Journal article (refereed), original research

Characterization of New Particle Formation Events in Kuopio, Finland Based on a three-year analysis

Hamed A, Portin H, Leskinen M, Komppula M, Lehtinen KEJ, Romakkaniemi S, Smith JN, Joutsensaari J, Laaksonen A. 2011.

European Integrated project on Aerosol Cloud Climate and Air Quality interactions (EUCAARI) ¿ integrating aerosol research from nano to global scales

Kulmala Markku, Asmi Ari, Lappalainen H K, Baltensperger U, Brenguier J-L, Facchini M C, Hansson H-C, Hov Ø, O'Dowd C D, Pöschl U, Wiedensohler A, Boers R, Boucher O, de Leeuw G, Denier van der Gon H A C, Feichter J, Krejci R, Laj P, Lihavainen H, Lohmann U, et al.. 2011. Atmospheric chemistry and physics. 11: 13061-13143 A1 Journal article (refereed), original research

General overview: European Integrated projects on aerosol cloud climate and air quality interactions (EUCAARI) ¿ Integrating aerosols research from nano to global scales

M. Kulmala, et al., Laaksonen, A., Lehtinen, K.E.J., A. Vaattovaara, P. et al.. 2011. Report series in aerosol science. 126: 192-198 D1 Article in a trade journal

Ice melting arctic ocean and climate: bubble burst particles

Vaattovaara, J. Zabori, T. Gustafsson, A. Laaksonen, R. Krejci, D. Nilssson. 2011. Report series in aerosol science. 128: 184-185 D1 Article in a trade journal

Mass yields of secondary organic aerosols from the oxidation of &#945 -pinene and real plant emissions

Hao Liqing, Romakkaniemi Sami, Yli-Pirilä Pasi, Joutsensaari Jorma, Kortelainen Aki, Kroll JH, Miettinen, Pasi, Vaattovaara Petri, Tiitta, Petri, Jaatinen Antti, Kajos MK, Holopainen JK, Heijari J, Rinne J, Kulmala Markku, Worsnop DR, Smith James & Laaksonen Ari. 2011. Atmospheric chemistry and physics. 11: 1367-1378 A1 Journal article (refereed), original research

Meteorological and trace gas factors affecting the number concentration of atmospheric Aitken (Dp = 50 nm) particles in the continental boundary layer: parameterization using a multivariate mixed effects model

Mikkonen Santtu, Korhonen H,annele Romakkaniemi Sami, Smith James, Joutsensaari Jorma, Lehtinen Kari EJ, Hamed Amar, Breider TJ, Birmili W, Spindler G, Plass-Duelmer C, Facchini MC & Laaksonen Ari. 2011. Geoscientific model development. 4: 1-13 A1 Journal article (refereed), original research

New particle formation events in semi-clean South African savannah

Vakkari Ville, Laakso H, Kulmala Markku, Laaksonen Ari, Mabaso D, Molefe M, Kgabi N & Laakso Lauri. 2011. Atmospheric chemistry and physics. 11: 3333-3346, A1 Journal article (refereed), original research

On-Line Characterization of Morphology and Water Adsorption on Fumed Silica Nanoparticles

Keskinen Helmi, Romakkaniemi Sami, Jaatinen Antti, Miettinen Pasi, Saukko Erkka, Joutsensaari Jorma, Mäkelä Jyrki M., Virtanen Annele, Smith James N. & Laaksonen Ari. 2011. Aerosol science and technology. 45: 1441-1447 A1 Journal article (refereed), original research

Representation of new particle formation in large scale models: Selection criteria for activation and kinetic coefficients

A. Laaksonen, A. Hamed, M. Kulmala, W. Birmili, F. Arnold, C. Plaß-Dülmer. 2011.

Representation of new particle formation in large scale models: Selection criteria for activation and kinetic coefficients.

A. Laaksonen, A. Hamed, M. Kulmala, W. Birmili, F. Arnold, C. Plaß-Dülmer. Teoksessa: AMAR HAMED(toim.) , 2011. NUCLEATION MECHNANICS. s. 1. A4 Conference proceedings

Role of sulphuric acid, ammonia and galactic cosmic rays in atmospheric aerosol nucleation

Kirkby Jasper, Curtius Joachim, Almeida João, Dunne Eimear, Duplissy Jonathan, Ehrhart Sebastian, Franchin Alessandro, Gagné Stéphanie, Ickes Luisa, Kürten Andreas, Kupc Agnieszka, Metzger Axel, Riccobono Francesco, Rondo Linda, Schobesberger Siegfried, Tsagkogeorgas Georgios, Wimmer Daniela, Amorim Antonio, Bianchi Federico, Breitenlechner Martin, et. al.. 2011. Nature. 476: 429¿433 A1 Journal article (refereed), original research

Sea spray aerosol production via bubble bursting during the Surface Ocean Aerosol Production (SOAP) study

Z. Ristovski, L. Cravigan, P. Vaattovaara, N. Talbot, G. Olivares, C. Law, M. Harvey, and A. Laaksonen. 2011.

Secondary organic aerosol on southern Pacific Ocean

P. Vaattovaara, L. Cravigan, N. Talbot, G. Olivares, C. Law, M. Harvey, Z. Ristovski, A. Laaksonen.. 2011.

Sources and atmospheric processing of organic aerosol in the Mediterranean: insights from aerosol mass spectrometer factor analysis

Hildebrandt L, Kostenidou E, Lanz V A, Prevot A S H, Baltensperger U, Mihalopoulos N, Laaksonen Ari, Donahue N M, Pandis S N. 2011. Atmospheric chemistry and physics. 11: 12499-12515 A1 Journal article (refereed), original research

Spatial distributions and seasonal cycles of aerosols in India and China seen in global climate-aerosol model

Henriksson SV, Laaksonen Ari, Kerminen V-M, Räisänen P, Järvinen H, Sundström A-M & de Leeuw G. 2011. Atmospheric chemistry and physics. 11: 7975-7990 A1 Journal article (refereed), original research

Statistical proxy for sulphuric acid concentration

Mikkonen Santtu, Romakkaniemi Sami, Smith James N, Korhonen Hannele, Petäjä Tuukka, Plass-Duelmer Christian, Boy Michael, McMurry Peter H, Lehtinen Kari EJ, Joutsensaari Jorma, Hamed Amar, Mauldin Lee R, Birmili Wolfram, Arnold Frank, Kulmala Markku, Laaksonen Ari. Teoksessa: Markku Kulmala, Jaana Bäck, Hanna K. Lappalainen and Tuomo Nieminen(toim.) , 2011. Proceedings of the Finnish Center of Excellence and Graduate School in 'Physics, Chemistry, Biology and Meteorology ofAtmospheric Composition and Climate Change' Annual Workshop 18.¿20.5.2011. s. 261-264. A4 Conference proceedings

Surface Southern Pacific Ocean SOA

P. Vaattovaara, L. Cravigan, N. Talbot, G. Olivares, C. Law, M. Harvey, Z. Ristovski, A. Laaksonen.. 2011. Report series in aerosol science. 126: 389-391 D1 Article in a trade journal

The role of relative humidity in continental new particle formation

Hamed Amar, Korhonen Hannele, Sihto Sanna-Liisa, Joutsensaari Jorma, Järvinen Heikki, Petäjä Tuukka, Arnold Frank, Nieminen Tuomo, Kulmala Markku, Smith James, Lehtinen Kari EJ & Laaksonen Ari. 2011. Journal of geophysical research. 116: D03202, 12 PP A1 Journal article (refereed), original research

An amorphous solid state of biogenic secondary organic aerosol particles

Virtanen A, Joutsensaari J, Koop T, Kannosto J, Yli-Pirilä P, Leskinen J, Mäkelä JM, Holopainen JK, Pöschl U, Kulmala M, Worsnop DR & Laaksonen A. 2010. Nature. 467: 824-827 A1 Journal article (refereed), original research

Atmospheric nucleation: highlights of the EUCAARI project and future directions

Kerminen VM, Petäjä T, Manninen HE, Paasonen P, Nieminen T, Sipilä M, Junninen H, Ehn M, Gagné S, Laakso L, Riipinen I, Vehkamäki H, Kurten T, Ortega IK, Dal Maso M, Brus D, Hyvärinen A, Lihavainen H, Leppä J, Lehtinen KEJ, Mirme A, Mirme S, Hõrrak U, Berndt T, Stratmann F, Birmili W, Wiedensohler A, Metzger A, Dommen J, Baltensperger U, Kiendler-ScharrA, Mentel TF, Wildt J, Winkler PM, Wagner PE, Petzold A, Minikin A, Plass-Dülmer C, Pöschl U, Laaksonen A & Kulmala M. 2010. Atmospheric chemistry and physics. 10: 10829-10848 A1 Journal article (refereed), original research

Biogenic SOA formed on biologically active Arctic Ocean close to ice edge

Vaattovaara Petri, Ristovski Zoran, Graus Martin, Muller Marcus, Hansel Armin, di Liberto Luca, Karl Matthias, Asmi Eija, Sjögren Staffan, Orsini Douglas, Leck Caroline, Laaksonen, Ari. 2010.

Changes in the production rate of secondary aerosol particles in Central Europe in view of decreasing SO2 emissions between 1996 and 2006

Hamed A, Birmili W, Joutsensaari J, Mikkonen S, Asmi A, Wehner B, Spindler G, Jaatinen A, Wiedensohler A, Korhonen H, Lehtinen, KEJ, & Laaksonen A. 2010. Atmospheric chemistry and physics. 10: 1071-1091 A1 Journal article (refereed), original research

Comment on "Using multiple observationally-based constraints to estimate climate sensitivity" by J. D. Annan and J. C. Hargreaves, Geophys. Res. Lett., 2006

Henriksson SV, Arjas E, Laine M, Tamminen J & Laaksonen A. 2010. Climate of the past. 6: 411-414 A1 Journal article (refereed), original research

EUCAARI ion spectrometer measurements at 12 European sites ¿ analysis of new particle formation events

Manninen HE, Nieminen T, Asmi E, Gagné S, Häkkinen S, Lehtipalo K, Aalto P, Vana M, Mirme A, Mirme S, Hõrrak U, Plass-Dülmer C, Stange G, Kiss G, Hoffer A, Törő N, Moerman M, Henzing B, de Leeuw G, Brinkenberg M, Kouvarakis GN, Bougiatioti A, Mihalopoulos N, O'Dowd C, Ceburnis D, Arneth A, Svenningsson B, Swietlicki E, Tarozzi L, Decesari S, Facchini MC, Birmili W, Sonntag A, Wiedensohler A, Boulon J, Sellegri K, Laj P, Gysel M, Bukowiecki N, Weingartner E, Wehrle G, Laaksonen A, Hamed A, J. 2010. Atmospheric chemistry and physics. 10: 7907-7927 A1 Journal article (refereed), original research

Explaining global surface aerosol number concentrations in terms of primary emissions and particle formation

Spracklen DV, Carslaw KS, Merikanto J, Mann GW, Reddington CL, Pickering S, Ogren JA, Andrews E, Baltensperger U, Weingartner E, Boy M, Kulmala M, Laakso L, Lihavainen H, Kivekäs N, Komppula M, Mihalopoulos N, Kouvarakis G, Jennings SG, O'Dowd C, Birmili W, Wiedensohler A, Weller R, Gras J, Laj P, Sellegri K, Bonn B, Krejci R, Laaksonen A, Hamed A, Minikin A, Harrison RM, Talbot R & Sun J. 2010. Atmospheric chemistry and physics. 10: 4775-4793 A1 Journal article (refereed), original research

Forestation of boreal peatlands: Impacts of changing albedo and greenhouse gas fluxes on radiative forcing

Lohila A, Minkkinen K, Laine J, Savolainen I, Tuovinen JP, Korhonen L, Laurila T, Tietäväinen H & Laaksonen A. 2010. Journal of geophysical research. 115: G04011 A1 Journal article (refereed), original research

Meteorological and trace gas factors affecting the number concentration of atmospheric aitken (dp = 50 nm) particles in the continental boundary layer: parameterization using a multivariate mixed effects model.

Mikkonen Santtu, Korhonen Hannele, Romakkaniemi Sami, Smith James N, Joutsensaari Jorma, Lehtinen Kari EJ, Hamed Amar, Breider Tom J, Birmili Wolfram, Spindler Gerald, Plass-Duelmer Christian, Facchini Maria Christina, Laaksonen Ari. Teoksessa: Markku Kulmala, Hanna K. Lappalainen, Ari Asmi and Tuomo Nieminen(toim.) , 2010. Proceedings of 2010 EUCAARI Annual Meeting, Helsinki 22.11-26.11.2010. s. 211-215. A4 Conference proceedings

On the roles of sulphuric acid and low-volatility organic vapours in the initial steps of atmospheric new particle formation

Paasonen P, Nieminen T, Asmi E, Manninen HE, Petäjä T, Plass-Dülmer C, Flentje H, Birmili W, Wiedensohler A, Hõrrak U, Metzger A, Hamed A, Laaksonen A, Facchini MC, Kerminen VM & Kulmala M. 2010. Atmospheric chemistry and physics. 10: 11223-11242 A1 Journal article (refereed), original research

Physicochemical properties and origin of organic groups detected in boreal forest using an aerosol mass spectrometer

Raatikainen T, Vaattovaara P, Tiitta P, Miettinen P, Rautiainen J, Ehn M, Kulmala M, Laaksonen A & Worsnop DR. 2010. Atmospheric chemistry and physics. 10: 2063-2077 A1 Journal article (refereed), original research

Relationship between aerosol oxidation level and hygroscopic properties of laboratory generated secondary organic aerosol (SOA) particles Relationship between aerosol oxidation level and hygroscopic properties of laboratory generated secondary organic aerosol (SOA) particles

Massoli P, Lambe AT, Ahern AT, Williams LR, Ehn M, Mikkilä J, Canagaratna MR, Brune WH, Onasch TB, Jayne JT, Petäjä T, Kulmala M, Laaksonen A, Kolb CE, Davidovits P & Worsnop DR. 2010. Geophysical research letters. 37: L24801 A1 Journal article (refereed), original research

Results from the CERN pilot CLOUD experiment

Duplissy J, Enghoff MB, Aplin KL, Arnold F, Aufmhoff H, Avngaard M, Baltensperger U, Bondo T, Bingham R, Carslaw K, Curtius J, David A, Fastrup B, Gagné S, Hahn F, Harrison RG, Kellett B, Kirkby J, Kulmala M, Laakso L, Laaksonen A, Lillestol E, Lockwood M, Mäkelä J, Makhmutov V, Marsh ND, Nieminen T, Onnela A, Pedersen E, Pedersen JOP, Polny J, Reichl U, Seinfeld JH, Sipilä M, Stozhkov Y, Stratmann F, Svensmark H, Svensmark J, Veenhof R, Verheggen B, Viisanen Y, Wagner PE, Wehrle G, Weingartner . 2010. Atmospheric chemistry and physics. 10: 1635-1647 A1 Journal article (refereed), original research

Roadside aerosol study using hygroscopic, organic and volatility TDMAs: Characterization and mixing state

Tiitta P, Miettinen P, Vaattovaara P, Joutsensaari J, Petäjä T, Virtanen A, Raatikainen T, Aalto P, Portin H, Romakkaniemi S, Kokkola H, Lehtinen KEJ, Kulmala M & Laaksonen A. 2010. Atmospheric environment. 44: 976-986 A1 Journal article (refereed), original research

Surfactants in cloud droplet activation: mixed organic-inorganic particles

Prisle NL, Raatikainen T, Laaksonen A & Bilde M. 2010. Atmospheric chemistry and physics. 10: 5663-5683 A1 Journal article (refereed), original research

The Effect of Pollution on Newly-formed Particle Composition in Boreal Forest

Petri Vaattovaara, Tuukka Petäjä, Jorma Joutsensaari, Pasi Miettinen, Boris Zaprudin, Aki Kortelainen, Juha Heijari, Pasi Yli-Pirilä, Pasi Aalto, Doug R.Worsnop, Ari Laaksonen. 2010.

The role of BVOC for secondary particles formed on Arctic Ocean

P. Vaattovaara, Z. Ristovski, M. Graus, M. Müller, S. Sjögren, D. Orsini, C. Leck, A. Laaksonen. 2010.

Ultrafine particle observation on the open water arctic ocean close to ice edge: secondary organic contribution

P. Vaattovaara, Z.D. Ristovski, M. Graus, M. Müller, E. Asmi, L. Di Liberto, S. Sjögren, D. Orsini, C. Leck, A. Laaksonen. 2010. Report series in aerosol science. 102: 78 D1 Article in a trade journal

A comparison of new particle formation events in the boundary layer at three different sites in Europe

Jaatinen A, Hamed A, Joutsensaari J, Mikkonen S, Birmili W, Wehner B, Spindler G, Wiedensohler A, Decesari S, Mircea M, Facchini MC, Junninen H, Kulmala M, Lehtinen KEJ, Laaksonen A. 2009. Boreal environment research. 14: 481-498 A1 Journal article (refereed), original research

Aerosol composition and properties of the organic fraction in Hyytiälä, Finland

Raatikainen T, Vaattovaara P, Tiitta P, Miettinen P, Rautiainen J, Ehn M, Kulmala M, Laaksonen A, Worsnop DR. Teoksessa: (toim.) , 2009. Nucleation and Atmospheric Aerosols 18th International Conference. s. 98-101. ICPF ASCR, v.v.i. and CAS A4 Conference proceedings

Aerosol-cloud interactions at Puijo semi-urban measurement station

Portin HJ, Komppula M, Leskinen A, Romakkaniemi S, Laaksonen A, Lehtinen K E J. Teoksessa: Kulmala M, Bäck J, Nieminen T, Lauri A(toim.) , 2009. Proceedings of the Finnish Center of Excellence and Graduate School in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change Annual Workshop. s. 352-355. A4 Conference proceedings

Case studies on satellite based and in situ measured cloud microphysical properties

Sorjamaa R, Romakkaniemi S, Laaksonen A. Teoksessa: Kulmala M, Bäck J, Nieminen T, Lauri A(toim.) , 2009. Proceedings of the Finnish Center of Excellence and Graduate School in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change Annual Workshop. s. 401-403. A4 Conference proceedings

Densities of critical clusters from nucleation experiments

Malila J, Laaksonen A, Napari I. Teoksessa: (toim.) , 2009. Nucleation and Atmospheric Aerosols 18th International Conference. s. 619-622. ICPF ASCR, v.v.i. and CAS A4 Conference proceedings

Densities of critical nuclei from measurements of the pressure dependence of nucleation rate

Malila J, Napari I, Laaksonen A. Teoksessa: Kulmala M, Bäck J, Nieminen T, Lauri A(toim.) , 2009. Proceedings of the Finnish Center of Excellence and Graduate School in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change Annual Workshop. s. 272-274. A4 Conference proceedings

Effect of droplet number concentration on the radiative fog

Romakkaniemi S, Laaksonen A, Stevens B. Teoksessa: Kulmala M, Bäck J, Nieminen T, Lauri A(toim.) , 2009. Proceedings of the Finnish Center of Excellence and Graduate School in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change Annual Workshop. s. 376-378. A4 Conference proceedings

Evolution of organic aerosols in the atmosphere

Canagaratna MR, Donahue NM, Prevot ASH, Zhang Q, Kroll JH, Decarlo PF, Allan JD, Coe H, Ng NL, Aiken AC, Docherty KS, Ulbrich IM, Grieshop AP, Robinson AL, Tian J, Laaksonen A, Raatikainen T, Rautiainen J, Vaattovaara P, Ehn M, Kulmala M. 2009. Science. 326: 1525-1529 A1 Journal article (refereed), original research

Increased coagulation scavenging does not explain suppression of nucleation events at high relative humidities?

Hamed A, Korhonen H, Sihto S-L, Joutsensaari J, Järvinen H, Lehtinen K, Kulmala M, Laaksonen A. Teoksessa: (toim.) , 2009. Nucleation and Atmospheric Aerosols 18th International Conference. s. 464-467. ICPF ASCR, v.v.i. and CAS A4 Conference proceedings

Large eddy simulations of radiative fog

Romakkaniemi S, Laaksonen A, Stevens B. Teoksessa: (toim.) , 2009. Nucleation and Atmospheric Aerosols 18th International Conference. s. 990-993. ICPF ASCR, v.v.i. and CAS A4 Conference proceedings

New particle formation from the oxidation of direct emissions of pine seedlings

Hao LQ, Yli-Pirilä P, Tiitta P, Romakkaniemi S, Vaattovaara P, Kajos MK, Rinne J, Heijari J, Kortelainen A, Miettinen P, Kroll JH, Holopainen JK, Smith JN, Joutsensaari J, Kulmala M, Worsnop DR, Laaksonen A. 2009. Atmospheric chemistry and physics. 9: 8121-8137 A1 Journal article (refereed), original research

Nucleation events in a polluted continental boundary layers as a source of CCN

Hamed A, Joutsensaari J, Mikkonen S, Wehner B, Birmili W, Tuch T, Spindler G, Wiedensohler A, Decesari S, Mircea M, Fuzzi S, Facchini MC, Laaksonen A. Teoksessa: Kulmala M, Bäck J, Nieminen T, Lauri A(toim.) , 2009. Proceedings of the Finnish Center of Excellence and Graduate School in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change Annual Workshop. s. 121-124. A4 Conference proceedings

Observations of aerosol-cloud interactions at Puijo semi-urban measurement station

Portin HJ, Komppula M, Leskinen A, Romakkaniemi S, Laaksonen A, Lehtinen KEJ. Teoksessa: (toim.) , 2009. Nucleation and Atmospheric Aerosols 18th International Conference. s. 383-386. ICPF ASCR, v.v.i. and CAS A4 Conference proceedings

Observations of aerosol-cloud interactions at the Puijo semi-urban measurement station

Portin HJ, Komppula M, Leskinen AP, Romakkaniemi S, Laaksonen A, Lehtinen KEJ. 2009. Boreal environment research. 14: 641-653 A1 Journal article (refereed), original research

Overview of the research activities and results at Puijo semi-urban measurement station

Leskinen A, Portin H, Komppula M, Miettinen P, Arola A, Lihavainen H, Hatakka J, Laaksonen A, Lehtinen KEJ. 2009. Boreal environment research. 14: 576-590 A1 Journal article (refereed), original research

Physical and chemical characteristics of aerosol particles and cloud-droplet activation during the Second Pallas Cloud Experiment (Second PaCE)

Kivekäs N, Kerminen V-M, Raatikainen T, Vaattovaara P, Laaksonen A, Lihavainen H. 2009. Boreal environment research. 14: 515-526 A1 Journal article (refereed), original research

Recent research activities at the Puijo semi-urban measurement station

Leskinen A, Portin H, Komppula M, Miettinen P, Lihavainen H, Hatakka J, Laaksonen A, Lehtinen KEJ. Teoksessa: (toim.) , 2009. Nucleation and Atmospheric Aerosols 18th International Conference. s. 858-861. ICPF ASCR, v.v.i. and CAS A4 Conference proceedings

Recent research activities at the Puijo semi-urban measurement station

Leskinen A, Portin H, Komppula M, Miettinen P, Lihavainen H, Hatakka J, Laaksonen A, Lehtinen KEJ. Teoksessa: Kulmala M, Bäck J, Nieminen T, Lauri A(toim.) , 2009. Proceedings of the Finnish Center of Excellence and Graduate School in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change Annual Workshop. s. 247-250. A4 Conference proceedings

Roadside aerosol study using hygroscopic, organic and volatility TDMAs

Tiitta P, Petäjä T, Miettinen P, Vaattovaara P, Joutsensaari J, Virtanen A, Aalto P, Portin H, Lehtinen KEJ, Kulmala M, Laaksonen A. Teoksessa: (toim.) , 2009. Nucleation and Atmospheric Aerosols 18th International Conference. s. 849-852. ICPF ASCR, v.v.i. and CAS A4 Conference proceedings

Roadside ufp study using hygroscopic, organic and volatility tdmas

Tiitta P, Miettinen P, Vaattovaara P, Joutsensaari J, Petäjä T, Virtanen A, Aalto P, Portin H, Lehtinen KEJ, Kulmala M, Laaksonen A. Teoksessa: Kulmala M, Bäck J, Nieminen T, Lauri A(toim.) , 2009. Proceedings of the Finnish Center of Excellence and Graduate School in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change Annual Workshop. s. 410-414. A4 Conference proceedings

SOA formation by ozonolysis of biogenic VOCs emitted from biotic stressed boreal trees

Joutsensaari J, Yli-Pirilä P, Blande JD, Heijari J, Holopainen JK, Worsnop DR, Laaksonen A. Teoksessa: (toim.) , 2009. Nucleation and Atmospheric Aerosols 18th International Conference. s. 309-312. ICPF ASCR, v.v.i. and CAS A4 Conference proceedings

Secondary organic contribution to particles formed on the ice melted Arctic ocean

Vaattovaara P, Ristovski ZD, Graus M, Müller M, Sjögren S, Orsini D, Leck C, Laaksonen A. Teoksessa: (toim.) , 2009. Nucleation and Atmospheric Aerosols 18th International Conference. s. 394-397. ICPF ASCR, v.v.i. and CAS A4 Conference proceedings

Sensitivity of aerosol concentrations and cloud properties to nucleation and secondary organic distripution in ECHAM5-HAM global circulation model

Makkonen R, Asmi A, Korhonen H, Kokkola H, Järvenoja S, Räisänen P, Lehtinen KEJ, Laaksonen A, Kerminen V-M, Järvinen H, Lohmann U, Bennartz R, Feichter J, Kulmala M. 2009. Atmospheric chemistry and physics. 9: 1747-1766 A1 Journal article (refereed), original research

Size resolved aerosol particle flux measurements: sampling methods and quality monitoring

Miettinen P, Laaksonen A. Teoksessa: Kulmala M, Bäck J, Nieminen T, Lauri A(toim.) , 2009. Proceedings of the Finnish Center of Excellence and Graduate School in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change Annual Workshop. s. 295-297. A4 Conference proceedings

Size-dependent activation of aerosols into cloud droplets at a subarctic background site during the second Pallas Cloud Experiment (2nd PaCE): method development and data evaluation

Anttila T, Vaattovaara P, Komppula M, Hyvärinen A-P, Lihavainen H, Kerminen V-M, Laaksonen A. 2009. Atmospheric chemistry and physics. 9: 4841-4854 A1 Journal article (refereed), original research

Statistical analysis of factors affecting to the number concentration of atmospheric aerosols in two polluted areas

Mikkonen S, Lehtinen KEJ, Romakkaniemi S, Joutsensaari J, Hamed A, Laaksonen A. Teoksessa: Kulmala M, Bäck J, Nieminen T, Lauri A(toim.) , 2009. Proceedings of the Finnish Center of Excellence and Graduate School in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change Annual Workshop. s. 303-306. A4 Conference proceedings

The applicability of three different nucleation event day prediction methods at three measurement sites in Europe

Jaatinen A, Hamed A, Joutsensaari J, Mikkonen S, Birmili W, Wehner B, Spindler G, Wiedensohler A, Decesari S, Mircea M, Facchini MC, Junninen H, Kulmala M, Lehtinen KEJ, Laaksonen A. Teoksessa: Kulmala M, Bäck J, Nieminen T, Lauri A(toim.) , 2009. Proceedings of the Finnish Center of Excellence and Graduate School in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change Annual Workshop. s. 151-155. A4 Conference proceedings

The evolution of nucleation- and Aitken-mode particle compositions in a boreal forest environment during clean and pollution-affected new-particle formation events

Vaattovaara P, Petäjä T, Joutsensaari J, Miettinen P, Zaprudin B, Kortelainen A, Heijari J, Yli-Pirilä P, Aalto P, Worsnop DR, Laaksonen A. 2009. Boreal environment research. 14: 662-682 A1 Journal article (refereed), original research

Ultrafine particle observation on the open water arctic ocean close to ice edge: secondary organic contribution

Vaattovaara P, Ristovski ZD, Graus M, Müller M, Asmi E, Di Liberto L, Sjögren S, Orsini D, Leck C, Laaksonen A. Teoksessa: Kulmala M, Bäck J, Nieminen T, Lauri A(toim.) , 2009. Proceedings of the Finnish Center of Excellence and Graduate School in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change". Annual Workshop". s. 433-438. A4 Conference proceedings

V-TDMA data from chamber experiments

Kortelainen A, Miettinen P, Romakkaniemi S, Laaksonen A. Teoksessa: Kulmala M, Bäck J, Nieminen T, Lauri A(toim.) , 2009. Proceedings of the Finnish Center of Excellence and Graduate School in Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change Annual Workshop. s. 204-207. A4 Conference proceedings

A comparison of new particle formation events in Eastern Germany and in Northern Italy on a three-year analysis

Hamed A, Mikkonen S, Joutsensaari J, Lehtinen KEJ, Jaatinen A, Wehner B, Birmili W, Wiedensohler A, Cavalli F, Decesari S, Mircea M, Fuzzi S, Facchini MC, Laaksonen A. 2008. Report series in aerosol science. : 37-39 D1 Article in a trade journal

Activities at the Puijo semi-urban aerosol-cloud interaction measurement station

Leskinen A, Portin H, Komppula M, Miettinen P, Pietikäinen N, Hirvonen J, Hyvärinen A-P, Kortelainen A, Raatikainen T, Sorjamaa R, Tiitta P, Vaattovaara P, Laaksonen A, Lehtinen KEJ, Lihavainen H, Viisanen Y. 2008. Report series in aerosol science. : 127-130 D1 Article in a trade journal

Aerosol composition measurements using Q-ams in Hyytiälä, Finland

Raatikainen T, Rautiainen J, Tiitta P, Miettinen P, Vaattovaara P, Ehn M, Kulmala M, Laaksonen A, Worsnop D. 2008. Report series in aerosol science. : 195-199 D1 Article in a trade journal

Cloud forming potential of secondary organic aerosol under near atmospheric conditions

Duplissy J, Gysel M, Alfarra MR, Dommen J, Metzger A, Prevot ASH, Weingartner E, Laaksonen A, Raatikainen T, Good N, Turner SF, McFiggans G, Baltensperger U. 2008. Geophysical research letters. 35: L03818 A1 Journal article (refereed), original research

Determination of the characteristics of ultrafine particles and air ions from road-side measurements

Tiitta P, Miettinen P, Vaattovaara P, Joutsensaari J, Laaksonen A, Aalto P, Kulmala M. 2008. Report series in aerosol science. : 256-261 D1 Article in a trade journal

Displacement barrier heights from experimental nucleation rate data

Malila J, Hyvärinen A-P, Viisanen Y, Laaksonen A. 2008. Atmospheric research. 90: 303-312 A1 Journal article (refereed), original research

Extension of Köhler theory for polydisperse aerosol population in the presence of semivolatile gases: applications for droplet growth from radiative fog to stratospheric supercooled ternary solution clouds

Romakkaniemi S, Kokkola H, Laaksonen A. 2008. Report series in aerosol science. : 200-203 D1 Article in a trade journal

Finding factors affecting to the number concentration of atmospheric aerosol with advanced statistical methods

Mikkonen S, Lehtinen KEJ, Hamed A, Joutsensaari J, Laaksonen A. Teoksessa: (toim.) , 2008. NOSA Aerosol Symposium. s. 77-78. A4 Conference proceedings

Formation of secondary organic aerosols by ozonolysis of plant-released volatiles

Joutsensaari J, Yli-pirilä P, Heijari J, Pinto DM, Loivamäki M, Vuorinen T, Miettinen P, Tiiva P, Nerg A-M, Raatikainen T, Rautiainen J, Kroll J, Kajos M, Ehn M, Worsnop DR, Holopainen JK, Laaksonen A. 2008. Report series in aerosol science. : 61-63 D1 Article in a trade journal

Microphysics of ice particle and cloud droplet formation: effect of semivolatile gases

Romakkaniemi S, Kokkola H, Pietikäinen J-P, Hienola J, Kulmala M, Lehtinen KEJ, Laaksonen A. 2008. Report series in aerosol science. : 205-209 D1 Article in a trade journal

New particle formation events in Northern Italy based on a three-year analysis

Mikkonen S, Hamed A, Lehtinen KEJ, Joutsensaari J, Jaatinen A, Sogacheva L, Facchini MC, Laaksonen A. Teoksessa: Markku Kulmala, Jaana Bäck, and Martta Salonen(toim.) , 2008. Proceedings of the Nordic Center of Excellence BACCI ( Biosphere-Atmosphere-Cloud-Climate Interactions) and the Finnish Center of Excellence``Research Unit on Physics, Chemistry, and Biology of Atmospheric Composition and Climate Change``. s. 158-161. A3 Book section, Chapters in research books

Nucleation

Laaksonen A, Lehtinen KEJ. Teoksessa: Colbeck I(toim.) , 2008. Environmental Chemistry of Aerosols. s. 31-46. Blackwell Publishing A3 Book section, Chapters in research books

Nucleation events in Italy, Germany and Finland: a comparative study

Hamed A, Jaatinen A, Joutsensaari J, Birmili W, Wehner B, Wiedensohler A, Facchini MC, Decesari S, Mircea M, Junninen H, Kulmala M, Lehtinen KEJ, Laaksonen A. Teoksessa: (toim.) , 2008. NOSA Aerosol Symposium. s. 39-40. A4 Conference proceedings

Overview of organic TDMA studies during period 2002-2007

Vaattovaara P, Joutsensaari J, Laaksonen A. 2008. Report series in aerosol science. : 262-269 D1 Article in a trade journal

Overview of the biosphere-aerosol-cloud-climate interactions (BACCI) studies

Kulmala M, Kerminen V-M, Laaksonen A, Riipinen I, Sipilä M, Ruuskanen TM, Sogacheva L, Hari P, Bäck J, Lehtinen KEJ, Viisanen Y, Bilde M, Svenningsson B, Lazaridis M, Torseth K, Tunved P, Nilsson ED, Pryor S, Sorensen L-L, Horrak U, Winkler PM, Swietlicki E, Riekkola M-L, Krejci R, Hoyle C, Hov O, Myhre G, Hansson H-C. 2008. Tellus series b: chemical and physical meteorology. 60B: 300-317 A2 Review article, Literature review, Systematic review

Properties of supercooled water clusters from nucleation rate data with the effect of non-ideal vapour phase

Malila J, Laaksonen A. Teoksessa: (toim.) , 2008. Proceedings of the 15th International Conference on the Properties of Water and Steam [CD]. s. . ICPWS, IAPWS A4 Conference proceedings

SALSA - a sectional aerosol module for large scale applications

Kokkola H, Korhonen H, Lehtinen KEJ, Makkonen R, Asmi A, Järvenoja S, Anttila T, Partanen A-I, Kulmala M, Järvinen H, Laaksonen A, Kerminen V-M. 2008. Atmospheric chemistry and physics. 8: 2469-2483 A1 Journal article (refereed), original research

SO2 oxidation products other than H2SO4 as a trigger of new particle formation. Part 1: Laboratory investigations

Berndt T, Stratmann F, Bräsel S, Heintzenberg J, Laaksonen A, Kulmala M. 2008. Atmospheric chemistry and physics. 8: 6365-6374 A1 Journal article (refereed), original research

SO2 oxidation products other than H2SO4 as a trigger of new particle formation. Part 2: Comparison of ambient and laboratory measurements, and atmospheric implications

Laaksonen A, Kulmala M, Berndt T, Stratmann F, Mikkonen S, Ruuskanen A, Lehtinen KEJ, Dal Maso M, Aalto P, Petäjä T, Riipinen I, Sihto S-L, Janson R, Arnold F, Hanke M, Ücker J, Umann B, Sellegri K, O¿Dowd CD, Viisanen Y. 2008. Atmospheric chemistry and physics. 8: 7255-7264, 2008 A1 Journal article (refereed), original research

Sensitivity of aerosol concentrations and cloud properties to nucleation and secondary organic distribution in ECHAM5-HAM global circulation model

Makkonen R, Asmi A, Korhonen H, Kokkola H, Järvenoja S, Räisänen P, Lehtinen KEJ, Laaksonen A, Kerminen V-M, Järvinen H, Lohmann U, Feichter J, Kulmala M. 2008. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. 8: 10955-10998 A1 Journal article (refereed), original research

Surface tensions of multicomponent aqueous electrolyte solutions: predictive models based on binary limits

Raatikainen T, Laaksonen A, Hyvärinen A-P, Vanhanen J, Hautio K, Lihavainen H, Viisanen Y, Napari I. 2008. Journal of physical chemistry c. 112: 10428-10434 A1 Journal article (refereed), original research

Surfactant partitioning in cloud droplet activation: a study of C8,C10,C12 and C14 normal fatty acid sodium salts

Prisle NL, Raatikainen T, Sorjamaa R, Svenningsson B, Laaksonen A, Bilde M. 2008. Tellus series b: chemical and physical meteorology. 60B: 416-431 A1 Journal article (refereed), original research

Technical note: analytical formulae for the critical supersaturations and droplet diameters of CCN containing insoluble material

Kokkola H, Vesterinen M, Anttila T, Laaksonen A, Lehtinen KEJ. 2008. Atmospheric chemistry and physics. 8: 1985-1988 A1 Journal article (refereed), original research

The effect of surface active compounds on cloud droplet activation

Raatikainen T, Sorjamaa R, Kokkola H, Prisle NL, Svenningsson B, Bilde M, Laaksonen A. 2008. Report series in aerosol science. : 166-170 D1 Article in a trade journal

The role of VOC oxidation products in continental new particle formation

Laaksonen A, Kulmala M, O`Dowd CD, Joutsensaari J, Vaattovaara P, Mikkonen S, Lehtinen KEJ, Sogacheva L, Dal Maso M, Aalto P, Petäjä T, Sogachev A, Yoon YJ, Lihavainen H, Nilsson D, Facchini MC. 2008. Atmospheric chemistry and physics. 8: 2657-2665 A1 Journal article (refereed), original research

A comparison of new particle formation at different sites in the European boundary layer

Hamed A, Jaatinen A, Wehner B, Birmili W, Wiedensohler A, Cavalli F, Decesari S, Mircea M, Fuzzi S, Facchini MC, Dal Maso M, Junninen H, Riipinen I, Kulmala M, Joutsensaari J, Lehtinen KEJ, Laaksonen A. Teoksessa: (toim.) , 2007. NOSA Aerosol Symoposium. Conference proceedings. s. 32-33. Nordic Society for Aerosol Research A4 Conference proceedings

Analysing the number concentration of 50 nm particles with multivariate mixed effects model

Mikkonen S, Lehtinen KEJ, Hamed A, Joutsensaari J, Laaksonen A. Teoksessa: Colin O'Dowd and Paul Wagner(toim.) , 2007. Nucleation and Atmospheric Aerosols, Proceedings of the 17th international ICNAA Conference. s. 1008-1012. Springer A4 Conference proceedings

Connections between atmospheric sulphuric acid and new particle formation during QUEST lll-IV campaigns in Heidelberg and Hyytiälä

Riipinen I, Sihto S-L, Kulmala M, Arnold F, Dal Maso M, Birmili W, Saarnio K, Teinilä K, Kerminen V-M, Laaksonen A, Lehtinen KEJ. 2007. Atmospheric chemistry and physics. 7: 1899-1914 A1 Journal article (refereed), original research

Effect of particle phase oligomer formation on aerosol growth

Vesterinen M, Lehtinen KEJ, Kulmala M, Laaksonen A. 2007. Atmospheric environment. 41: 1768-1776 A1 Journal article (refereed), original research

Effects of atmospheric ozone on biogenic volatile organic compounds: an atmospheric and ecological perspective

Pinto DM, Joutsensaari J, Tiiva P, Miettinen P, Blande J, Dong W-X, Nerg AM, Laaksonen A, Holopainen JK. Teoksessa: Xiang H, Akieh MN, Vuorio A-M, Jokinen T, Sillanpää M(toim.) , 2007. Eighth Finnish Conference of Environmental Sciences. s. 131-134. Finnish Society for Environmental Sciences A4 Conference proceedings

Hygroscopic properties of ultrafine aerosol particles in the boreal forest: diurnal variation, solubility and the influence of sulfuric acid

Ehn M, Petäjä T, Aufmhoff H, Aalto P, Hämeri K, Arnold F, Laaksonen A, Kulmala M. 2007. Atmospheric chemistry and physics. 7: 211-222 A1 Journal article (refereed), original research

Multivariate mixed effects regression model in the analysis of number concentration of 50NM particles

Mikkonen S, Lehtinen KEJ, Hamed A, Joutsensaari J, Laaksonen A. Teoksessa: (toim.) , 2007. NOSA Aerosol Symposium. Conference proceedings. s. 76-77. Nordic Society for Aerosol Research A4 Conference proceedings

Nucleation and growth of new particles in Po Valley, Italy

Hamed A, Joutsensaari J, Mikkonen S, Sogacheva L, Dal Maso M, Kulmala M, Cavalli F, Fuzzi S, Facchini MC, Decesari S, Mircea M, Lehtinen KEJ, Laaksonen A. 2007. Atmospheric chemistry and physics. 7: 355-376 A1 Journal article (refereed), original research

Nucleation events in Melpitz, Germany, and Po Valley, Italy: similarities and differences

Hamed A, Lehtinen KEJ, Joutsensaari J, Wehner B, Birmili W, Wiedensohler A, Cavalli F, Decesari S, Mircea M, Fuzzi S, Facchini MC, Laaksonen A. Teoksessa: O¿Dowd CD, Wagner P(toim.) , 2007. Nucleation and Atmospheric Aerosols. 17th International conference. ICNAA 2007. s. 240-244. Springer A4 Conference proceedings

On aerosol-cloud studies at the Puijo semiurban measurement station

Leskinen A, Raatikainen T, Hirvonen J, Hyvärinen A-P, Kortelainen A, Miettinen P, Pietikäinen N, Portin H, Rautiainen J, Sorjamaa R, Tiitta P, Vaattovaara P, Laaksonen A, Lehtinen KEJ, Lihavainen H, Viisanen Y. Teoksessa: O'Dowd CD, Wagner PE(toim.) , 2007. Nucleation and Atmospheric Aerosols, 17th International Conference, ICNAA 2007. s. 561-564. Springer A4 Conference proceedings

Organic fraction in recently formed nucleation event particles in mace head coastal atmosphere during map 2006 summer campaign

Vaattovaara P, Kortelainen A, Laaksonen A. Teoksessa: O'Dowd CD, Wagner PE(toim.) , 2007. Nucleation and Atmospheric Aerosols, 17th International Conference, ICNAA 2007. s. 1075-1078. Springer Netherlands A4 Conference proceedings

Relation of air mass history to nucleation events in Po Valley, Italy, using back trajectories analysis

Sogacheva L, Hamed A, Facchini MC, Kulmala M, Laaksonen A. 2007. Atmospheric chemistry and physics. 7: 839-853 A1 Journal article (refereed), original research

Road-side measurements of aerosol and ion number size distributions:a comparison with remote site measurements

Tiitta P, Miettinen P, Vaattovaara P, Laaksonen A, Joutsensaari J, Hirsikko A, Aalto P, Kulmala M. 2007. Boreal environment research. 12: 311-321 A1 Journal article (refereed), original research

Road-side measurements of air ions

Tiitta P, Miettinen P, Vaattovaara P, Laaksonen A, Joutsensaari J, Hirsikko A, Aalto P, Kulmala M. Teoksessa: (toim.) , 2007. NOSA Aerosol Symposium. Conference proceedings. s. 102-103. Nordic Society for Aerosol Research A4 Conference proceedings

Secondary organic aerosol formation by ozonolysis of volatiles emitted from trees

Joutsensaari J, Yli-Pirilä P, Heijari J, Holopainen JK, Miettinen P, Raatikainen T, Rautiainen J, Worsnop DR, Laaksonen A. Teoksessa: (toim.) , 2007. NOSA Aerosol Symposium. Conference proceedings. s. 38-39. Nordic Society for Aerosol Research A4 Conference proceedings

Significant secondary organic effect of marine biota origin on coastal and open ocean aerosols

Vaattovaara P, Huttunen PE, Yoon YJ, Joutsensaari J, Lehtinen KEJ, O'Dowd CD, Laaksonen A. Teoksessa: (toim.) , 2007. Solas Open Science Conference. s. 202-203. A4 Conference proceedings

Students' initial knowledge of electric and magnetic fields - more profound explanations and reasoning models for undesired conceptions

Saarelainen M, Laaksonen A, Hirvonen PE. 2007. European journal of physics. 28: 51-60 A1 Journal article (refereed), original research

Surface tension and scaling of critical nuclei in diatomic and triatomic fluids

Napari I, Laaksonen A. 2007. Journal of chemical physics. 126: 7 s A1 Journal article (refereed), original research

The effect of H2O adsorption on cloud drop activation of insoluble particles: a theoretical framework

Sorjamaa R, Laaksonen A. 2007. Atmospheric chemistry and physics. 7: 6175-6180 A1 Journal article (refereed), original research

The effects of increasing atmospheric ozone on biogenic monoterpene profiles and the formation of secondary aerosols

Pinto DM, Tiiva P, Miettinen P, Joutsensaari J, Kokkola H, Nerg A-M, Laaksonen A, Holopainen JK. 2007. Atmospheric environment. 41: 4877-4887 A1 Journal article (refereed), original research

The role of VOC oxidation products in continental new particle formation

Laaksonen A, Kulmala M, O'Dowd CD, Joutsensaari J, Vaattovaara P, Mikkonen S, Lehtinen KEJ, Sogacheva L, Dal Maso M, Aalto P, Petäjä T, Sogachev A, Yoon YJ, Lihavainen H, Nilsson D, Facchini MC, Cavalli F, Fuzzi S, Hoffmann T, Arnold F, Hanke M, Sellegri K, Umann B, Junkermann W, Coe H, Allan JD, Rami Alfarra M, Worsnop DR, Riekkola M-L, Hyötyläinen T, Viisanen Y. 2007. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. 7: 7819-7841 A1 Journal article (refereed), original research

Weekly precipitation cycles? Lack of evidence from United States surface stations

Schultz DM, Mikkonen S, Laaksonen A, Richman MB. 2007. Geophysical research letters. 34: 4 s A1 Journal article (refereed), original research

A new method for studying vapor adsorption on nanoparticles

Hiltunen LJ, Vaattovaara P, Joutsensaari J, Laaksonen A. 2006. Report series in aerosol science. 81A: 173-175 D1 Article in a trade journal

A novel method for measuring vapor adsorption on nanoparticles

Hiltunen LJ, Vaattovaara P, Joutsensaari J, Laaksonen A. Teoksessa: Vehkamäki H, Bergman T, Julin J, Salonen M, Kulmala M(toim.) , 2006. NOSA 2006 Aerosol symposium, combined with the X Finnish National Aerosol Symposium. s. 95-97. A4 Conference proceedings

An apparatus for studying vapor adsorption on nanoparticles

Hiltunen LJ, Vaattovaara P, Joutsensaari J, Laaksonen A. Teoksessa: (toim.) , 2006. 7th International Aerosol Conference. s. 389-390. AAAR A4 Conference proceedings

Atmospheric sulphuric acid and aerosol formation: implications from atmospheric measurements for nucleation and early growth mechanisms

Sihto S-L, Kulmala M, Kerminen V-M, Dal Maso M, Petäjä T, Riipinen I, Korhonen H, Arnold F, Janson R, Boy M, Laaksonen A, Lehtinen KEJ. 2006. Atmospheric chemistry and physics. 6: 4079-4091 A1 Journal article (refereed), original research

Characterization of new particle formation events in highly polluted area

Hamed A, Joutsensaari J, Cavalli F, Facchini MC, Fuzzi S, Laaksonen A. Teoksessa: (toim.) , 2006. 7th International Aerosol Conference. s. 591-592. AAAR A4 Conference proceedings

Cloud formation of particles containing humic-like substances

Kokkola H, Sorjamaa R, Peräniemi A, Raatikainen T, Laaksonen A. 2006. Geophysical research letters. 33: 5 s. A1 Journal article (refereed), original research

Cluster activation theory as an explanation of the linear dependence between formation rate of 3 nm particles and sulphuric acid concentration

Kulmala M, Lehtinen KEJ, Laaksonen A. 2006. Atmospheric chemistry and physics. 6: 787-793 A1 Journal article (refereed), original research

Composition of ambient aerosols during one nucleation and growth event in Hyytiälä, Finland

Raatikainen T, Vaattovaara P, Rautiainen J, Tiitta P, Laaksonen A. Teoksessa: Vehkamäki H, Bergman T, Julin J, Salonen M, Kulmala M(toim.) , 2006. NOSA 2006 Aerosol symposium, combined with the X Finnish National Aerosol Symposium, Finnish-Czech Aerosol Symposium, and BACCI workshop. s. 302-305. A4 Conference proceedings

Connections between atmospheric sulphuric acid and new particle formation during QUEST lll-iV campaigns in Heidelberg and Hyytiälä

Riipinen I, Sihto S-L, Kulmala M, Arnold F, Dal Maso, Birmili W, Saario K, Teinilä K, Kerminen V-M, Laaksonen A, Lehtinen K.E.J. 2006. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. 6: 10837-10882 A1 Journal article (refereed), original research

Correlation of nucleation events with environmental variables in highly polutted area, Po Valley, Italy

Hamed A, Joutsensaari J, Mikkonen S, Facchini CM, Laaksonen A. Teoksessa: Vehkamäki H, Bergman T, Julin J, Salonen M, Kulmala M(toim.) , 2006. NOSA 2006 Aerosol symposium, combined with the X Finnish National Aerosol Symposium. s. 86-89. A4 Conference proceedings

Determination of the characteristics of ultrafine particles from road-side measurements

Tiitta P, Miettinen P, Vaattovaara P, Joutsensaari J, Laaksonen A, Aalto P, Kulmala M. 2006. Report series in aerosol science. : 609-611 D1 Article in a trade journal

Determination of the chemical characteristics of particles from road-side measurements

Tiitta P, Miettinen P, Vaattovaara P, Joutsensaari J, Laaksonen A, Aalto P, Kulmala M. Teoksessa: (toim.) , 2006. 7th International Aerosol Conference. s. 1812-1813. AAAR A4 Conference proceedings

Evidence for marine secondary organic contribution to newly-formed nanometer-sized particles formation

Vaattovaara P, Huttunen PE, Yoon YJ, Joutsensaari J, Lehtinen KEJ, O'Dowd CD, Laaksonen A. Teoksessa: Vehkamäki H, Bergman T, Julin J, Salonen M, Kulmala M(toim.) , 2006. NOSA 2006 Aerosol symposium, combined with the X Finnish National Aerosol Symposium. s. 394-398. A4 Conference proceedings

Formation of secondary organic aerosols by ozonolysis of plant-released volatiles

Joutsensaari J, Loivamäki M, Vuorinen T, Miettinen P, Pinto DM, Tiiva P, Nerg A-M, Holopainen JK, Laaksonen A. Teoksessa: Vehkamäki H, Bergman T, Julin J, Salonen M, Kulmala M(toim.) , 2006. NOSA 2006 Aerosol symposium, combined with the X Finnish National Aerosol Symposium. s. 118-121. A4 Conference proceedings

Hydroscopic properties of ultrafine aerosol particles in the boreal forest: diurnal variation, solubility and the influence of sulfuric acid

Ehn M, Petäjä T, Aufmhoff H, Hämeri K, Arnold F, Laaksonen A, Kulmala M. 2006. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. 6: 9937-9965 A1 Journal article (refereed), original research

Marine secondary organic contribution to coastal nucleation events

Vaattovaara P, Huttunen PE, Yoon YJ, Joutsensaari J, Lehtinen KEJ, O¿Dowd CD, Laaksonen A. 2006.

Marine secondary organic contribution to ultrafine particles

Vaattovaara P, Huttunen PE, Yoon YJ, Joutsensaari J, Lehtinen KEJ, O'Dowd CD, Laaksonen A. 2006. Report series in aerosol science. 81 A: 631-633 D1 Article in a trade journal

Modelling the size distribution of 3-50 Nm particles with generalized models

Mikkonen S, Lehtinen KEJ, Hamed A, Joutsensaari J, Laaksonen A. Teoksessa: Vehkamäki H, Bergman T, Julin J, Salonen M, Kulmala M(toim.) , 2006. NOSA 2006 Aerosol symposium, combined with the X Finnish National Aerosol Symposium. s. 246-48. A4 Conference proceedings

Nucleation and growth of new particles in Po Valley, Italy

Hamed A, Joutsensaari J, Mikkonen S, Sogacheva L, Dal Maso M, Kulmala M, Cavalli F, Fuzzi S, Facchini MC, Decesari S, Mircea M, Lehtinen KEJ, Laaksonen A. 2006. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. 6: 9603-9653 A1 Journal article (refereed), original research

On the hygroscopic growth of ammoniated sulfate particles of non-stoichiometric composition

Kokkola H, Joutsensaari J, Hyppönen N, Lehtinen KEJ, Laaksonen A. 2006. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. 6: 1-16 A1 Journal article (refereed), original research

Overview of the second Pallas cloud experiment (second pace)

Komppula M, Lihavainen H, Kerminen V-M, Hyvärinen A-P, Aaltonen V, Engler C, Kivekäs N, Leskinen A, Rautiainen J, Miettinen P, Vaattovaara P, Tiitta P, Sorjamaa R, Hillamo R., Viisanen Y, Laaksonen A. Teoksessa: Reissell A, Aarflot A(toim.) , 2006. Integrated land ecosystem - atmosphere processes study. Proceedings of the 1st iLEAPS Science Conference. s. 151-152. Aerosolitutkimusseura A4 Conference proceedings

Particle formation by ozonolysis of inducible plant volatiles

Miettinen P, Holopainen J, Joutsensaari J, Laaksonen A. 2006. Report series in aerosol science. 81B: 398-399 D1 Article in a trade journal

Physical and chemical properties of aerosol particles and cloud droplets during the second Pallas Cloud experiment (Second PaCE)

Komppula M, Lihavainen H, Hyvärinen AP, Kerminen VM, Aaltonen V, Engler C, Kivekäs N, Leskinen A, Vaattovaara P, Rautiainen J, Miettinen P, Tiitta P, Sorjamaa R, Hillamo R, Makkonen U, Viisanen Y, Laaksonen A. Teoksessa: Biswas P, Chen DR, Hering S(toim.) , 2006. Abstract Book of 7th International Areosol Conference. s. 1352-1353. A4 Conference proceedings

Relation of air mass history to nucleation events in Po Valley, Italy, using back trajectories analysis

Sogacheva L, Hamed A, Facchini MC, Kulmala M, Laaksonen A. 2006. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. 6: 11209-11246 A1 Journal article (refereed), original research

Road-side measurements of air ions

Tiitta P, Miettinen P, Vaattovaara P, Laaksonen A, Joutsensaari J, Hirsikko A, Aalto P, Kulmala M. Teoksessa: Vehkamäki H, Bergman T, Julin J, Salonen M, Kulmala M(toim.) , 2006. NOSA 2006 Aerosol Symposium, combined with the X Finnish National Aerosol Symposium. s. 380-381. A4 Conference proceedings

Size and composition measurements of background aerosol and new particle growth in a Finnish forest during QUEST 2 using an Aerodyne Aerosol Mass Spectrometer

Allan JD, Alfarra MR, Bower KN, Coe H, Jayne JT, Worsnop DR, Aalto PP, Kulmala M, Hyötyläinen T, Cavalli F, Laaksonen A. 2006. Atmospheric chemistry and physics. 6: 315-327 A1 Journal article (refereed), original research

The composition of nucleation and Aitken modes particles during coastal nucleation events: evidence for marine secondary organic contribution

Vaattovaara P, Huttunen PE, Yoon YJ, Joutsensaari J, Lehtinen KEJ, O'Dowd CD, Laaksonen A. 2006. Atmospheric chemistry and physics. 6: 4601-4616 A1 Journal article (refereed), original research

The effect of physical and chemical aerosol properties on warm cloud droplet activation

McFiggans G, Artaxo P, Baltensperger U, Coe H, Facchini MC, Feingold G, Fuzzi S, Gysel M, Laaksonen A, Lohmann U, Mentel TF, Murphy DM, O¿Dowd CD, Snider JR, Weingartner E. 2006. Atmospheric chemistry and physics. 6: 2593-2649 A1 Journal article (refereed), original research

The effect of surfactant partitioning on critical supersaturation of cloud drops: a generalized approach

Sorjamaa R, Laaksonen A. Teoksessa: (toim.) , 2006. 7th International Aerosol Conference. Abstract book. s. 751-752. American Association for Aerosol Research (AAAR) A4 Conference proceedings

The influence of nitric acid on the cloud processing of aerosol particles

Romakkaniemi S, Kokkola H, Lehtinen KEJ, Laaksonen A. 2006. Atmospheric chemistry and physics. 6: 1627-1634 A1 Journal article (refereed), original research

The influence of surface active compounds on critical supersaturation of cloud drops

Sorjamaa R, Laaksonen A. Teoksessa: Vehkamäki H, Bergman T, Julin J, Salonen M, Kulmala M(toim.) , 2006. NOSA 2006 Aerosol symposium, combined with the X Finnish National Aerosol Symposium, Finnish-Czech Aerosol Symposium, and BACCI workshop. s. 357-360. Aerosolitutkimusseura R.Y. A4 Conference proceedings

The influence of surfactant properties on critical supersaturations of cloud condensation nuclei

Sorjamaa R, Laaksonen A. 2006. Journal of aerosol science. 37: 1730-1736 A1 Journal article (refereed), original research

Using discriminant analysis as a nucleation event classification method

Mikkonen S, Lehtinen KEJ, Hamed A, Joutsensaari J, Facchini MC, Laaksonen A. 2006. Atmospheric chemistry and physics. 6: 5549-5557 A1 Journal article (refereed), original research

A method for detecting the presence of organic fraction in nucleation mode sized particles

Vaattovaara P, Räsänen M, Kühn T, Joutsensaari J, Laaksonen A. 2005. Atmospheric chemistry and physics. 5: 3277-3287 A1 Journal article (refereed), original research

Application of several activity coefficient models to water-organic electrolyte aerosols of atmospheric interest

Raatikainen T, Laaksonen A. 2005. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. 5: 2475-2495 A1 Journal article (refereed), original research

Application of several activity coefficient models to water-organic electrolyte aerosols of atmospheric interest

Raatikainen T, Laaksonen A. 2005. Atmospheric chemistry and physics. 5: 2475-2495 A1 Journal article (refereed), original research

Cloud condensation nucleus production from nucleation events at a highly polluted region

Laaksonen A, Hamed A, Joutsensaari J, Hiltunen L, Cavalli F, Junkermann W, Asmi A, Fuzzi S, Facchini MC. 2005. Geophysical research letters. 32: L06812 A1 Journal article (refereed), original research

Commentary on cloud modelling and the mass accommodation coefficient of water

Laaksonen A, Vesala T, Kulmala M, Winkler PM, Wagner PE. 2005. Atmospheric chemistry and physics. 5: 461-464 A1 Journal article (refereed), original research

Effects of SO2 oxidation on ambient aerosol growth in water and ethanol vapours

Petäjä T, Kerminen VM, Hämeri K, Vaattovaara P, Joutsensaari J, Junkermann W, Laaksonen A, Kulmala M. 2005. Atmospheric chemistry and physics. 5: 767-779 A1 Journal article (refereed), original research

Evaluation of Surface Composition of Surface Active Water¿Alcohol Type Mixtures:¿ A Comparison of Semiempirical Models

Salonen, Martta, Malila, Jussi, Napari, Ismo, Laaksonen, Ari. 2005. Journal of physical chemistry b. 109: 3472-3479 A1 Journal article (refereed), original research

Evaluation of surface composition of surface active water-alcohol type mixtures: a comparison of semiempirical models

Salonen M, Malila J, Napari I, Laaksonen A. 2005. Journal of physical chemistry b. 109: 3472-3479 A1 Journal article (refereed), original research

Monitoring of particles in a real-world driving conditions

Tiitta M, Miettinen P, Vaattovaara P, Joutsensaari J, Laaksonen A, Aalto P, Kulmala M. Teoksessa: (toim.) , 2005. 2nd Joint Bacci Meeting. s. 5 s.. Nordic Center of Excellence, BACCI. Aerosol Research Group A4 Conference proceedings

Nanoparticle formation by ozonolysis of inducible plant volatiles

Joutsensaari J, Loivamäki M, Vuorinen T, Miettinen P, Nerg A-M, Holopainen JK, Laaksonen A. 2005. Atmospheric chemistry and physics. 5: 1489-1495 A1 Journal article (refereed), original research

Parameterization of the nitric acid effect on CCN activation

Romakkaniemi S, Kokkola H, Laaksonen A. 2005. Atmospheric chemistry and physics. 5: 879-885 A1 Journal article (refereed), original research

Research unit of physics, chemistry and biology of atmospheric composition and climate change: overview of recent results

Kulmala M, Hari P, Laaksonen A, Vesala T, Viisanen Y. 2005. Boreal environment research. 10: 459-477 A1 Journal article (refereed), original research

Role of sulphuric acid in particle formation events in Finland

Sihto S.-L., Kulmala M., Kerminen V-M., Laaksonen A., Lehtinen K.E.J.. Teoksessa: (toim.) , 2005. AAAR 2005 Proceedings. s. . A4 Conference proceedings

Soluble trace gas effect on cloud condensation nuclei activation: influence of initial equilibration on cloud model results

Romakkaniemi S, Kokkola H, Laaksonen A. 2005. Journal of geophysical research. 110: D15202 A1 Journal article (refereed), original research

Surface tensions and densities of H2SO4 + NH3 + water solutions

Hyvärinen A-P, Raatikainen T, Laaksonen A, Viisanen Y, Lihavainen H. 2005. Geophysical research letters. 32: L16806 A1 Journal article (refereed), original research

The effect of physical and chemical aerosol properties on warm cloud droplet activation

Mcfiggans G, Artaxo P, Baltensperger U, Coe H, Faccihini MC, Feingold G, Fuzzi S, Gysel M, Laaksonen A, Lohmann U, Mentel TF, Murphy DM, O¿Dowd CD, Snider JR, Weingartner E. 2005. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. 5: 8507-8646 A1 Journal article (refereed), original research

The influence of nitric acid on the cloud processing of aerosol particles

Romakkaniemi S, Kokkola H, Lehtinen K, Laaksonen A. 2005. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. : 10197-10216 A1 Journal article (refereed), original research

Why formation rate of 3 nm particles dependes lineary on sulphuric acid concentration

Kulmala M, Lehtinen KEJ, Laaksonen A. 2005. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. : 11277-11293 A1 Journal article (refereed), original research

Binary homogeneous nucleation in water-succinic acid and water-glutaric acid systems

Gaman AI, Kulmala M, Vehkamäki H, Napari I, Mircea M, Facchini MC, Laaksonen A. 2004. Journal of chemical physics. 120: 282-291 A1 Journal article (refereed), original research

Growth of upper tropospheric aerosols due to uptake of HNO3

Romakkaniemi S, Kokkola H, Petzold A, Laaksonen A. 2004. Atmospheric chemistry and physics. 4: 549-556 A1 Journal article (refereed), original research

Growth of upper tropospheric aerosols due to uptake of HNO3

Romakkaniemi S, Kokkola H, Petzold A, Laaksonen A. 2004. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. 4: 121-140 A1 Journal article (refereed), original research

On the closure conjectures for the Gibbsian approximation model of a binary droplet

Djikaev YS, Napari I, Laaksonen A. 2004. Journal of chemical physics. 120: 9752-9762 A1 Journal article (refereed), original research

Organic aerosol formation via sulphate cluster activation

Kulmala M, Kerminen V-M, Anttila T, Laaksonen A, O'Dowd CD. 2004. Journal of geophysical research. 109: D04205 A1 Journal article (refereed), original research

Overview of the field measurement campaign in Hyytiälä, August 2001 in the framework of the EU project OSOA

Boy M, Petäjä T, Dal Maso M, Rannik Ü, Rinne J, Aalto P, Laaksonen A, Vaattovaara P, Joutsensaari J, Hoffmann T, Warnke J, Apostolaki M, Stephanou EG, Tsapakis M, Kouvarakis A, Pio C, Carvalho A, Römpp A, Moortgat G, Spirig C, Guenther A, Greenberg J. 2004. Atmospheric chemistry and physics. 4: 657-678 A1 Journal article (refereed), original research

Surface tensions and densities of sulfuric acid + dimethylamine + water solutions

Hyvärinen A-P, Lihavainen H, Hautio K, Raatikainen T, Viisanen Y, Laaksonen A. 2004. Journal of chemical and engineering data. 49: 917-922 A1 Journal article (refereed), original research

The role of surfactants in Köhler theory reconsidered

Sorjamaa R, Svenningsson B, Raatikainen T, Henning S, Bilde M, Laaksonen A. 2004. Atmospheric chemistry and physics. : 2107-2117 A1 Journal article (refereed), original research

Time-resolved growth behavior of acid aerosols in ethanol vapor with a tandem-DMA technique

Joutsensaari J, Toivonen T, Vaattovaara P, Vesterinen M, Vepsäläinen J, Laaksonen A. 2004. Journal of aerosol science. : 851-867 A1 Journal article (refereed), original research

A cloud microphysics model including trace gas condensation and sulfate chemistry

Kokkola H, Romakkaniemi S, Kulmala M, Laaksonen A. 2003. Boreal environment research. 8: 413-424 A1 Journal article (refereed), original research

Aerosol formation induced by simultaneous condensation of sulfuric acid and organic vapours

Anttila T, Kerminen V-M, Laaksonen A, Kulmala M. Teoksessa: (toim.) , 2003. Abstracts of the European Aerosol Conference 2003. s. S819-S820. A4 Conference proceedings

Comparison of the experimental mobility equivalent diameter for small cluster ions with theoretical particle diameter corrected by effect of vapour polarity

Nadykto AB, Mäkelä JM, Yu F, Kulmala M, Laaksonen A. 2003. Chemical physics letters. 382: 6-11 A1 Journal article (refereed), original research

Detection of organic acid and ammonium bisulfate particles with an organic tandem differential mobility analyzer

Joutsensaari J, Toivonen T, Vesterinen M, Vaattovaara P, Vepsäläinen J, Laaksonen A. Teoksessa: (toim.) , 2003. Abstracts of the European Aerosol Conference 2003. s. S1447-S1448. A4 Conference proceedings

Disjoining pressure of thin films on spherical core particles

Napari I, Laaksonen A. 2003. Journal of chemical physics. 119: 10363-10366 A1 Journal article (refereed), original research

Estimation of different forest-related contributions to the radiative balance using observations in southern Finland

Kurtén T, Kulmala M, Dal Maso M, Suni T, Reissell A, Vehkamäki H, Hari P, Laaksonen A, Viisanen Y, Vesala T. 2003. Boreal environment research. 8: 275-285 A1 Journal article (refereed), original research

Evaporation and condensational growth of liquid droplets in nonisothermal gas mixtures

Nadykto AB, Shchukin ER, Kulmala M, Lehtinen KEJ, Laaksonen A. 2003. Aerosol science and technology. 37: 315-324 A1 Journal article (refereed), original research

Homogeneous and ion induced nucleation: kinetic and thermodynamic nucleation regimes

Kulmala M, Napari I, Merikanto J, Vehkamäki H, Laakso A, Lehtinen KEJ, Noppel M, Laaksonen A. Teoksessa: (toim.) , 2003. Abstracts of the European Aerosol Conference 2003. s. S1393-S1394. A4 Conference proceedings

Köhler theory for a polydisperse droplet population in the presence of a soluble trace gas, and an application to stratospheric STS droplet growth

Kokkola H, Romakkaniemi S, Laaksonen A. 2003. Atmospheric chemistry and physics. 3: 2139-2146 A1 Journal article (refereed), original research

Model simulations of fog formation in polluted air

Kokkola H, Romakkaniemi S, Laaksonen A. Teoksessa: (toim.) , 2003. Abstracts of the European Aerosol Conference 2003. s. S831-S832. A4 Conference proceedings

Model studies on the effect of nitric acid vapour on cirrus cloud activation

Hienola J, Kulmala M, Laaksonen A. 2003. Atmospheric research. 65: 235-250 A1 Journal article (refereed), original research

Model studies on the influence of initial equilibration of the soluble trace gases on CCN activation

Romakkaniemi S, Kokkola H, Laaksonen A. Teoksessa: (toim.) , 2003. Abstracts of the European Aerosol Conference 2003. s. S839-S840. A4 Conference proceedings

Modelling the formation of organic particles in the atmosphere

Anttila T, Kerminen V-M, Kulmala M, Laaksonen A, O'Dowd C. 2003. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. 3: 6147-6178 A1 Journal article (refereed), original research

Nucleation probability in binary heterogeneous nucleation of water-n-propanol vapor mixtures on insoluble and soluble nanoparticles

Wagner PE, Kaller D, Vrtala A, Lauri A, Kulmala M, Laaksonen A. 2003. PHYSICAL REVIEW. E. (ONLINE). 67: 021605-1 - 021605-12 A1 Journal article (refereed), original research

On the formation of radiation fogs under heavily polluted conditions

Kokkola H, Romakkaniemi S, Laaksonen A. 2003. Atmospheric chemistry and physics. 3: 581-589 A1 Journal article (refereed), original research

On the formation of secondary organic aerosols: binary and ternary nucleation

Gaman AI, Vehkamäki H, Napari I, Laaksonen A, Kulmala M. Teoksessa: (toim.) , 2003. Abstracts of the European Aerosol Conference 2003. s. S1073-S1074. A4 Conference proceedings

Otdma study of ultrafine particle composition at mace head

Vaattovaara P, Joutsensaari J, Toivonen T, Laaksonen A. Teoksessa: (toim.) , 2003. Abstracts of the European Aerosol Conference 2003. s. S621-S622. A4 Conference proceedings

Overview of the field measurement campaign in Hyytiälä, August 2001 in the framework of the EU project OSOA

Boy M, Petäjä T, Dal Maso M, Rannik Ü, Rinne J, Aalto P, Laaksonen A, Vaattovaara P, Joutsensaari J, Hoffmann T, Warnke J, Apostolaki M, Stephanou EG, Tsapakis M, Kouvarakis A, Pio C, Carvalho A, Römpp A, Moortgat G, Spirig C, Guenther A, Greenberg J. 2003. ATMOSPHERIC CHEMISTRY AND PHYSICS DISCUSSIONS. 3: 3769-3831 A1 Journal article (refereed), original research

Preliminary results from the Quest project (quantification of aerosol nucleation in the European boundary layer)

Laaksonen A, Kulmala M, O'Dowd C, Viisanen Y, Nilsson D, Facchini MC, Hoffmann T, Arnold F, Schell B, Junkermann W. Teoksessa: (toim.) , 2003. Abstracts of the European Aerosol Conference 2003. s. S1337-S1338. A4 Conference proceedings

Reliable potential for small sulfuric acid-water clusters

Ding C-G, Taskila T, Laasonen K, Laaksonen A. 2003. Chemical physics. 287: 7-19 A1 Journal article (refereed), original research

Study of finely divided aqueous systems as an aid to understanding the formation mechanism of polar stratospheric clouds: Case of HNO3/H20 and H2SO4/H2O systems

Bogdan A, Molina MJ, Kulmala M, MacKenzie AR, Laaksonen A. 2003. Journal of geophysical research. 108: AAC 1-1 - 1-10 A1 Journal article (refereed), original research

Study of finely divided aqueous systems as an aid to understanding the surface chemistry of polar stratospheric clouds: Case of HCl/H2O and HNO3/HCl/H2O systems

Bodgan A, Kulmala M, MacKenzie AR, Laaksonen A. 2003. Journal of geophysical research. 108: AAC 2-1 - 2-7 A1 Journal article (refereed), original research

Surfactant partitioning and the raoult effect in Köhler theory

Sorjamaa R, Laaksonen A. Teoksessa: (toim.) , 2003. Abstracts of the European aerosol conference 2003. s. S145-S146. A4 Conference proceedings

Two sulfuric acids in small water clusters

Ding C-G, Laasonen K, Laaksonen A. 2003. Journal of physical chemistry a. 107: 8648-8658 A1 Journal article (refereed), original research

An improved parameterization for sulfuric acid-water nucleation rates for tropospheric and stratospheric conditions

Vehkamäki H, Kulmala M, Napari I, Lehtinen KEJ, Timmreck C, Noppel M, Laaksonen A. 2002. Journal of geophysical research. 107: AAC 3-1 - AAC 3-10 A1 Journal article (refereed), original research

Atmospheric nucleation: activation of thermodynamically stable sulfate clusters by water soluble organic species

Laaksonen A, Kerminen V-M, Anttila T, Kulmala M. Teoksessa: Wang C-S(toim.) , 2002. Sixth International Aerosol Conference 2002 IAC. Vol. 2. s. 1247-1248. Chinese Association for Aerosol Research in Taiwan A4 Conference proceedings

Binary homogenous nucleation of water - succinic acid vapours: model calculations

Gaman A, Kulmala M, Vehkamäki H, Laaksonen A, Mircea M, Facchini MC. Teoksessa: Smolik J, Hämeri K(toim.) , 2002. Czech - Finnish Aeresol Symposium. s. 35-38. Aerosolitutkimusseura ry A4 Conference proceedings

Can chemical effects on cloud droplet number rival the first indirect effect?

Nenes A, Charlson RJ, Facchini MC, Kulmala M, Laaksonen A, Seinfeld JH. 2002. Geophysical research letters. 29: 1-4 A1 Journal article (refereed), original research

Detection of organic acid particles with an organic tandem differential mobility analyzer

Joutsensaari J, Vaattovaara P, Toivonen T, Vesterinen M, Vepsäläinen J, Laaksonen A. Teoksessa: (toim.) , 2002. Program Conference Proceedings NOSA Aerosol Symposium. s. 33-34. Nordic Society for Aerosol Research A4 Conference proceedings

Growth of aerosol particles resulting from condensation of oxidation products of monoterpenes

Puustinen A, Laaksonen A, Janson R, Kulmala M. Teoksessa: Wang C-S(toim.) , 2002. Sixth International Aerosol Conference 2002 IAC. Vol 1.. s. 259-260. Chinese Association for Aerosol Research in Taiwan A4 Conference proceedings

Heterogeneous nucleation of n-propanol and water: a new approach to determine the microscopic contact angle

Lauri A, Kulmala M, Wagner PE, Kaller D, Vrtala A, Laaksonen A. Teoksessa: Smolik J, Hämeri K(toim.) , 2002. Czech - Finnish Aerosol Symposium. s. 106-110. Aerosolitutkimusseura ry A4 Conference proceedings

On the binary homogeneous nucleation of water-C4-C5 dicarboxylic acids

Gaman A, Kulmala M, Vehkamäki H, Laaksonen A. Teoksessa: (toim.) , 2002. Program Conference Proceedings NOSA Aerosol Symposium. s. 21-22. Nordic Society for Aerosol Research A4 Conference proceedings

On the effect of nitric acid on equilibrium growth of aerosol population in stratosphere

Romakkaniemi S, Laaksonen A. Teoksessa: Smolik J, Hämeri K(toim.) , 2002. Czech - Finnish Aerosol Symposium. s. 126-128. Aerosolitutkimusseura ry A4 Conference proceedings

On the mechanisms of smog formation in polluted air

Kokkola H, Laaksonen A. Teoksessa: Smolik J, Hämeri K(toim.) , 2002. Czech - Finnish Aerosol Symposium. s. 77-79. Aerosolitutkimusseura ry A4 Conference proceedings

Parameterizations for binary and ternary nucleation

Vehkamäki H, Napari I, Lehtinen KEJ, Timmreck C, Noppel M, Laaksonen A, Kulmala M. Teoksessa: Wang C-S(toim.) , 2002. Sixth International Aerosol Conference, 2002 IAC. Vol 1. s. 179-180. Chinese Assosiation for Aerosol Research in Taiwan A4 Conference proceedings

Parameterizations for binary water-sulfuric acid and ternary water-sulfuric acid-ammonia nucleation

Vehkamäki H, Napari I, Lehtinen KEJ, Timmreck C, Noppel M, Laaksonen A, Kulmala M. Teoksessa: Smolik J, Hämeri K(toim.) , 2002. Czech - Finnish Aerosol Symposium. s. 160-163. Aerosolitutkimusseura ry A4 Conference proceedings

Slightly soluble organic material and Köhler curves: effect of particle size dependence of solubility

Sorjamaa R, Laaksonen A. Teoksessa: Smolik J, Hämeri K(toim.) , 2002. Czech - Finnish Aerosol Symposium. s. 146-148. Aerosolitutkimusseura ry A4 Conference proceedings

Study of toluene oxidation products with and without ammonium sulfate seed aerosol using the organic tandem differential mobility analyzer (OTDMA)

Vaattovaara P, Joutsensaari J, Laaksonen A. Teoksessa: Wang C-S(toim.) , 2002. Sixth International Aerosol Conference 2002 IAC. Vol. 2. s. 849-850. Chinese Association for Aerosol Research in Taiwan A4 Conference proceedings

The composition of secondary organic aerosols: TDMA growth factor analysis using UNIFAC

Vaattovaara P, Joutsensaari J, Laaksonen A. Teoksessa: (toim.) , 2002. Program Conference Proceedings NOSA Aerosol Symposium. s. 81-82. Nordic Society for Aerosol Research A4 Conference proceedings

A novel tandem differential mobility analyzer with organic vapor treatment of aerosol particles

Joutsensaari J, Vaattovaara P, Vesterinen M, Hämeri K, Laaksonen A. 2001. Atmospheric chemistry and physics. 1: 51-60 A1 Journal article (refereed), original research

Adsorption of water on 8-15 nm NaCl and (NH4)2SO4 aerosols measured using an ultrafine tandem differential mobility analyzer

Romakkaniemi S, Hämeri K, Väkevä M, Laaksonen A. 2001. Journal of physical chemistry a. 105: 8183-8188 A1 Journal article (refereed), original research

Analytical model of condensational growth of a multicomponent non-spherical particle

Nadykto AB, Shchukin ER, Kulmala M, Laaksonen A. Teoksessa: (toim.) , 2001. Abstracts of the European Aerosol Conference 2001, EAC 2001 European Aerosol Conference 2001. s. S763-S764. A4 Conference proceedings

Breakdown of the capillarity approximation in binary nucleation: a density functional study

Laaksonen A, Napari I. 2001. Journal of physical chemistry b. 105: 11678-11682 A1 Journal article (refereed), original research

Condensation and evaporation of water vapor in mixed aerosols of liquid droplets and ice: numerical comparison of growth rate expressions

Hienola J, Kulmala M, Laaksonen A. 2001. Journal of aerosol science. 32: 351-374 A1 Journal article (refereed), original research

Construction of organic tandem differential mobility analyzer

Joutsensaari J, Vaattovaara P, Laaksonen A. Teoksessa: (toim.) , 2001. Abstracts of the European Aerosol Conference 2001, EAC 2001 European Aerosol Conference 2001. s. S911-S912. A4 Conference proceedings

Deliquescence and hygroscopic properties of ultrafine particles

Hämeri K, Väkevä M, Suni T, Laaksonen A, Romakkaniemi S, Hansson H-C. Teoksessa: (toim.) , 2001. Abstracts of the European Aerosol Conference 2001, EAC 2001 European Aerosol Conference 2001. s. S379-S380. A4 Conference proceedings

Determination of the organic content of atmospheric aerosols using a TDMA

Vaattovaara P, Joutsensaari J, Laaksonen A. Teoksessa: (toim.) , 2001. Abstracts of the European Aerosol Conference 2001, EAC 2001 European Aerosol Conference 2001. s. S173-S174. A4 Conference proceedings

Hygroscopic growth of ultrafine sodium chloride particles

Hämeri K, Laaksonen A, Väkevä M, Suni T. 2001. Journal of geophysical research. 106: 20,749-20,757 A1 Journal article (refereed), original research

Model studies of the effect of nitric acid vapour on cirrus formation

Hienola J, Kulmala M, Laaksonen A. Teoksessa: (toim.) , 2001. Abstracts of the European Aerosol Conference 2001, EAC 2001 European Aerosol Conference 2001. s. S739-S740. A4 Conference proceedings

Modification of the fuchs condensation theory to predict transitional condensational growth of non-spherical ice particles

Nadykto AB, Shchukin ER, Kulmala M, Laaksonen A. Teoksessa: (toim.) , 2001. Abstracts of the European Aerosol Conference 2001, EAC 2001 European Aerosol Conference 2001. s. S1039-S1040. A4 Conference proceedings

Nucleation theories and atmospheric aerosol formation

Laaksonen A. Teoksessa: (toim.) , 2001. Abstracts of the European Aerosol Conference 2001, EAC 2001 European Aerosol Conference 2001. s. S323-S324. A4 Conference proceedings

On the effect of gaseous ammonia on cloud drop formation

Sorjamaa R, Laaksonen A, Kulmala M. Teoksessa: (toim.) , 2001. Abstracts of the European Aerosol Conference 2001, AEC 2001 European Aerosol Conference 2001. s. S761-S762. A4 Conference proceedings

Overview of the international project on biogenic aerosol formation in the boreal forest (BIOFOR)

Kulmala M, Hämeri K, Aalto PP, Mäkelä JM, Pirjola L, Douglas Nilsson E, Buzorius G, Rannik Ü, Dal Maso M, Seidl W, Hoffman T, Janson R, Hansson H-C, Viisanen Y, Laaksonen A, O'Dowd CD. 2001. Tellus series b: chemical and physical meteorology. 53B: 324-343 A1 Journal article (refereed), original research

Preliminary results of the OSOA project (origin and formation of secondary organic aerosol)

Hoffmann T, Schell B, Hjorth J, Barnes I, Moortgat G, Reviejo M, Ciccioli P, Stephanou E, Kulmala M, Pio C, Laaksonen A, Hayman G, Guenther A, Müller K. Teoksessa: (toim.) , 2001. Abstracts of the European Aerosol Conference 2001, EAC 2001 European Aerosol Conference 2001. s. S903-S904. A4 Conference proceedings

Problems in the classical theory of heterogeneous necleation for different binary vapour mixtures

Lauri A, Kulmala M, Laaksonen A, Wagner PE. Teoksessa: (toim.) , 2001. Abstracts of the European Aerosol Conference 2001, EAC 2001 European Aerosol Conference. s. S15-S16. A4 Conference proceedings

Reshaping the theory of cloud formation

Charlson RJ, Seinfeld JH, Nenes A, Kulmala M, Laaksonen A, Facchini MC. 2001. Science. 292: 2025-2026 A1 Journal article (refereed), original research

Soluble-insoluble transition in binary heterogeneous nucleation

Petersen D, Ortner R, Vrtala A, Wagner PE, Kulmala M, Laaksonen A. 2001. Physical review letters. 87: 225703-1-225703-4 A1 Journal article (refereed), original research

Strange predictions by binary heterogeneous nucleation theory compared with a quantitative experiment

Kulmala M, Lauri A, Vehkamäki H, Laaksonen A, Petersen D, Wagner PE. 2001. Journal of physical chemistry b. 105: 11800-11808 A1 Journal article (refereed), original research

Surface tensions of water solutions of sulfuric acid and dimethylamine

Viisanen Y, Pihlajamaa K, Lihavainen H, Laaksonen A. Teoksessa: (toim.) , 2001. Abstracts of the European Aerosol Conference 2001, EAC 2001 European Aerosol Conference 2001. s. S257-S258. A4 Conference proceedings

The effect of potential truncation on the gas-liquid surface tension of planar interfaces and droplets

Napari I, Laaksonen A. 2001. Journal of chemical physics. 114: 5796-5801 A1 Journal article (refereed), original research

The effect of sulfate production on cloud droplet formation

Kokkola H, Laaksonen A. Teoksessa: (toim.) , 2001. Abstracts of the European Aerosol Conference 2001, EAC 2001 European Aerosol Conference 2001. s. S493-S494. A4 Conference proceedings

Theory of size dependent deliquescence of nanoparticles: Relation to heterogeneous nucleation and comparison with experiments

Djikaev YS, Bowles R, Reiss H, Hämeri K, Laaksonen A, Väkevä M. 2001. Journal of physical chemistry b. 105: 7708-7722 A1 Journal article (refereed), original research

Application of nucleation theories to atmospheric aerosol formation

Laaksonen A. Teoksessa: Hale BN, Kulmala M(toim.) , 2000. Nucleation and Atmospheric Aerosols 2000. 15th International Conference. s. 711-723. American Institute of Physics A4 Conference proceedings

Biogenic aerosol formation in the boreal forest

Kulmala M, Hämeri K, Mäkelä JM, Aalto PP, Pirjola L, Väkevä M, Nilsson ED, Koponen IK, Buzorius G, Keronen P, Rannik Ü, Laakso L, Vesala T, Bigg K, Seidl W, Forkel R, Hoffmann T, Spanke J, Janson R, Shimmo M, Hansson H-C, O'Dowd C, Becker E. 2000. Boreal environment research. 5: 281-297 A1 Journal article (refereed), original research

Biogenic aerosol formation in the boreal forest

Hämeri K, Mäkelä JM, Aalto PP, Pirjola L, Väkevä M, Koponen IK, Buzorius G, Keronen P, Rannik Ü, Vesala T, Laakso L, Seidl W, Forkel R, Hoffmann T, Spanke J, Nilsson ED, Jansson R, Hansson H-C, O'Dowd C, Becker E, Paatero J, Teinilä K, Hillamo R. Teoksessa: (toim.) , 2000. Abstracts of the 2000 European Aerosol Conference. s. 598-599. Pergamon A4 Conference proceedings

Characteristics of the atmospheric particle formation events observed at a borel forest site in Southern Finland

Mäkelä JM, Dal Maso M, Pirjola L, Keronen P, Laakso L, Kulmala M, Laaksonen A. 2000. Boreal environment research. 5: 299-313 A1 Journal article (refereed), original research

Characteristics of the three years continuous data on new particle formation events observed at a boreal forest site

Mäkelä JM, Dal Maso M, Laaksonen A, Pirjola L, Keronen P, Kulmala M. Teoksessa: Hale BN, Kulmala M(toim.) , 2000. Nucleation and Atmospheric Aerosols 2000. 15th International Conference. s. 896-899. American Institute of Physics A4 Conference proceedings

Density-functional studies of amphiphilic binary mixtures: I. Phase behavior

Napari I, Laaksonen A, Strey R. 2000. Journal of chemical physics. 113: 4476-4479 A1 Journal article (refereed), original research

Density-functional studies of amphiphilic binary mixtures: II. Gas-liquid nucleation

Napari I, Laaksonen A, Strey R. 2000. Journal of chemical physics. 113: 4480-4487 A1 Journal article (refereed), original research

Enhancement of CCN concentration due to aqueous phase sulfate production in polluted air

Mattila T, Viisanen Y, Kokkola H, Laaksonen A, Kulmala M. Teoksessa: (toim.) , 2000. Abstracts of the 2000 European Aerosol Conference. s. 360-361. Pergamon A4 Conference proceedings

Evaporation and condensation rates of a multicomponent droplet in a non-isothermal gas mixture

Nadykto AB, Schukin ER, Kulmala M, Laaksonen A. Teoksessa: (toim.) , 2000. Abstracts of the 2000 European Aerosol Conference. s. 801-802. Pergamon A4 Conference proceedings

Hygroscopic growth of ultrafine ammonium sulphate aerosol measured using an ultrafine tandem differential mobility analyzer

Hämeri K, Väkevä M, Hansson H-C, Laaksonen A. 2000. Journal of geophysical research. 105: 22,231-22,242 A1 Journal article (refereed), original research

Model studies on the effect of nitric acid vapour on cirrus cloud formation

Hienola J, Kulmala M, Laaksonen A. Teoksessa: Hale BN, Kulmala M(toim.) , 2000. Nucleation and Atmospheric Aerosols 2000. 15th International Conference. s. 654-657. American Institute of Physics A4 Conference proceedings

Molecular dynamics simulations of gas-liquid nucleation of Lennard-Jones fluid

Laasonen K, Wonczak S, Strey R, Laaksonen A. 2000. Journal of chemical physics. 113: 9741-9747 A1 Journal article (refereed), original research

Mutual nucleation enhancement in phase-separating amphiphilic systems

Napari I, Laaksonen A. Teoksessa: (toim.) , 2000. Abstracts of the 2000 European Aerosol Conference. s. 252-253. Pergamon A4 Conference proceedings

On evaporation and condensational growth of a non-spherical particle

Nadykto AB, Schukin ER, Kulmala M, Laaksonen A. Teoksessa: (toim.) , 2000. Abstracts of the 2000 European Aerosol Conference. s. 803-804. Pergamon A4 Conference proceedings

Organic tandem differential mobility analyzer

Joutsensaari J, Vaattovaara P, Laaksonen A, Väkevä M, Hämeri K. Teoksessa: (toim.) , 2000. Abstracts of the European Aerosol Conference. s. 775-776. Pergamon A4 Conference proceedings

Parametrisation of sulphuric acid-water nucleation rates for upper tropospheric and stratospheric conditions

Vehkamäki H, Kulmala M, Timmreck C, Laaksonen A. Teoksessa: (toim.) , 2000. Abstracts of the 2000 European Aerosol Conference. s. 448-449. Pergamon A4 Conference proceedings

Physical chemistry of aerosol formation

Kulmala M, Vesala T, Laaksonen A. Teoksessa: Spurny KR(toim.) , 2000. Aerosol Chemical Processes in the Environment. s. 23-46. Lewis Publishers A3 Book section, Chapters in research books

Solar variability and clouds

Kirkby J, Laaksonen A. Teoksessa: Friis-Christensen E, Fröhlich C, Haigh JD, Schüssler M, von Steiger R(toim.) , 2000. Solar Variability and Climate. Proceedings of an ISSI Workshop. s. 397-409. Kluwer A4 Conference proceedings

Surfactant effects and an order-disorder transition in binary gas-liquid nucleation

Napari I, Laaksonen A. 2000. Physical review letters. 84: 2184-2187 A1 Journal article (refereed), original research

Ternary nucleation of H2SO4, NH3 and H2O

Kulmala M, Korhonen P, Laaksonen A, Viisanen Y, McGraw R, Seinfeld JH. Teoksessa: Hale BN, Kulmala M(toim.) , 2000. Nucleation and Atmospheric Aerosols 2000. 15th International Conference. s. 111-114. American Institute of Physics A4 Conference proceedings

The homogeneous heteromolecular nucleation of sulphuric acid, water and ammonia in the coastal environment

Kulmala M, Korhonen P, Viisanen Y, Laaksonen A. Teoksessa: (toim.) , 2000. Abstracts of the 2000 European Aerosol Conference. s. 652-653. Pergamon A4 Conference proceedings

The influence of particle solubility on heterogeneous nucleation in binary vapor mixtures

Petersen D, Ortner R, Vrtala A, Laaksonen A, Kulmala M, Wagner PE. Teoksessa: Hale BN, Kulmala M(toim.) , 2000. Nucleation and Atmospheric Aerosols 2000. 15th International Conference. s. 135-138. American Institute of Physics A4 Conference proceedings

Upper tropospheric SO2 conversion into sulfuric acid aerosols and cloud condensation nuclei

Laaksonen A, Pirjola L, Kulmala M, Wohlfrom K-H, Arnold F, Raes F. 2000. Journal of geophysical research. 105: 1459-1469 A1 Journal article (refereed), original research

A density functional approach to nucleation in partially miscible binary mixtures

Napari I, Laaksonen A. 1999. JOURNAL OF AEROSOL SCIENCE. SUPPLEMENT. 30: S33-S34 A1 Journal article (refereed), original research

A density functional study of liquid-liquid interfaces in partially miscible systems

Napari I, Laaksonen A, Talanquer V, Oxtoby DW. 1999. Journal of chemical physics. 110: 5906-5912 A1 Journal article (refereed), original research

Applicability and limitations of the capillarity approximation for modeling heterogeneous nucleation in binary vapor mixtures

Petersen D, Ortner R, Vrtala A, Laaksonen A, Kulmala M, Wagner PE. 1999. JOURNAL OF AEROSOL SCIENCE. SUPPLEMENT. 30: S35-S36 A1 Journal article (refereed), original research

Gas-liquid nucleation in partially miscible systems: free-energy surfaces and structures of nuclei from density functional calculations

Napari I, Laaksonen A. 1999. Journal of chemical physics. 111: 5485-5490 A1 Journal article (refereed), original research

Hygroscopic properties of ultrafine inorganic salt particles

Hämeri K, Väkevä M, Laaksonen A. 1999. JOURNAL OF AEROSOL SCIENCE. SUPPLEMENT. 30: S15-S16 A1 Journal article (refereed), original research

Influence of nitric acid vapor on cloud particle formation at low temperatures in troposphere

Hienola J, Kulmala M, Laaksonen A. 1999. JOURNAL OF AEROSOL SCIENCE. SUPPLEMENT. 30: S23-S24 A1 Journal article (refereed), original research

Liquid-drop formalism and free-energy surfaces in binary homogeneous nucleation theory

Laaksonen A, McGraw R, Vehkamäki H. 1999. Journal of chemical physics. 111: 2019-2027 A1 Journal article (refereed), original research

Potential of upper tropospheric SO2 conversion into sulphuric acid aerosols and cloud condensation nuclei

Pirjola L, Kulmala M, Laaksonen A, Wohlfrom K-H, Arnold F, Raes F. 1999. JOURNAL OF AEROSOL SCIENCE. SUPPLEMENT. 30: S875-S876 A1 Journal article (refereed), original research

Ternary nucleation of H2SO4, NH3, and H2O in the atmosphere

Korhonen P, Kulmala M, Laaksonen A, Viisanen Y, McGraw R, Seinfeld JH. 1999. Journal of geophysical research. 104: 26,349-26,353 A1 Journal article (refereed), original research

Analysis of the growth of nucleation mode particles observed in Boreal forest

Kulmala M, Toivonen A, Mäkelä JM, Laaksonen A. 1998. Tellus series b: chemical and physical meteorology. : 449-462 A1 Journal article (refereed), original research

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Hygroscopic and chemical characterisation of Po Valley aerosol

Improved power-law estimates from multiple samples provided by millennium climate simulations

Increased hygroscopicity of Arizona Test Dust seeds by secondary organic aerosol coating from Increased hygroscopicity of Arizona Test Dust seeds by secondary organic alfa-pinene ozonolysis

Increasing trend in the average temperature in Finland, 1847-2012

Insight into Acid-Base Nucleation Experiments by Comparison of the Chemical Composition of Positive, Negative, and Neutral Clusters

Multimodel estimates of the changes in the Baltic Sea ice cover during the present century

Neutral molecular cluster formation of sulfuric acid-dimethylamine observed in real time under atmospheric conditions

Observing wind, aerosol particles, cloud and precipitation: Finland's new ground-based remote-sensing network

Organic aerosol components derived from 25 AMS data sets across Europe using a consistent ME-2 based source apportionment approach

Oxidation Products of Biogenic Emissions Contribute to Nucleation of Atmospheric Particles

Reallocation in modal aerosol models: impacts on predicting aerosol radiative effects

Representing situational knowledge acquired from sensor data for atmospheric phenomena

Spatial distributions and seasonal cycles of aerosol climate effects in India seen in a global climate-aerosol model

The effect of cloudiness on new-particle formation: investigation of radiation levels

The effect of local sources on particle size and chemical composition and their role in aerosol-cloud interactions at Puijo measurement station

The third Pallas Cloud Experiment: Consistency between the aerosol hygroscopic growth and CCN activity

Trends in the average temperature in Finland, 1847-2013

A combined theory of heterogeneous nucleation and adsorption of vapors on solid surfaces

Acquisition and Representation of Knowledge for Atmospheric New Particle Formation

Aerosol Chemical Composition in Cloud Events by High Resolution Time-of-Flight Aerosol Mass Spectrometry

Black carbon concentration and deposition estimations in Finland by the regional aerosol-climate model REMO-HAM

Bounce characteristics of &#945 -pinene derived SOA particles with implications to physical phase

Direct Observations of Atmospheric Aerosol Nucleation

Effective aerosol optical depth from pyranometer measurements of surface solar radiation (global radiation) at Thessaloniki, Greece

Effects of modal and sectional aerosol representations on aerosol activation and light extinction