Biogeochemistry research group
Leaders
The research carried out in the Biogeochemistry research group focuses on studying the processes underlying the atmospheric greenhouse gases and reactive gaces important for atmospheric chemistry. Ecosystems can act as sources or sinks of several trace gases, such as carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), nitrogen monoxide (NO), nitrous acid (HONO) and biogenic volatile organic compounds (BVOCs). All these gases play an important role in climate change. Our mission is to increase knowledge on CO2, CH4, N2O, NO, HONO and BVOCs dynamics in agricultural, forest and permafrost soils and aquatic ecosystems and the biogeochemical and microbial processes behind the fluxes. The Biogeochemistry research group consists of ca. 25 members with expertise in soil science, environmental sciences, greenhouse gas emissions, microbiology, stable isotopes, limnology, process modelling and atmospheric physics. Our research is multidisciplinary combining the expertise of researches having different scientific backgrounds. We collaborate world wide with leading researchers in their field. Also, our research group is international with more than 50% of the group members originating from outside Finland.
Cooperation
Keywords
Leaders
Professors
Senior Researchers
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Dan Kou
Senior ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Hannu Nykänen
Visiting ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Henri Siljanen
Academy Research FellowDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Kajar Köster
Associate ProfessorDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Lukas Kohl
Academy Research FellowDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Maija E. Marushchak
Academy Research FellowDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology
Post-doctoral Researchers
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Dhiraj Paul
Project ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Di Wu
Visiting ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Huizhong Zhang-Turpeinen
Postdoctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Jenie Gil Lugo
Project ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Niko Kinnunen
Visiting ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Saborni Maiti
Postdoctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Taija Saarela
Postdoctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology
Doctoral Researchers
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Johanna Kerttula
Doctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Jordan Briggs
Doctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Krishnapriya Thiyagarasaiyar
Doctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Matej Znamínko
Doctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Minna Nousiainen
Doctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Mohadeseh Ramezanalaghehband
Doctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Outi Kurri
Doctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Paula Martínez-Risco Martínez
Doctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Richard Lamprecht
Grant-funded ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Saara Tallbacka
Doctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Safi Ullah
Doctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Vincenzo Abagnale
Doctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology -
Wasi Hashmi
Doctoral ResearcherDepartment of Environmental and Biological Sciences, Faculty of Science, Forestry and Technology
Professor Emeritus
Publications
269 items-
Activity and Abundance of Nitrous Oxide Reducing Bacteria in <i>Platismatia glauca : An Epiphytic Lichen in the Boreal Spruce Forest
Abagnale, Vincenzo; Palacin‐Lizarbe, Carlos; Paul, Dhiraj; Kerttula, Johanna; Ronkainen, Jussi; Siljanen, Henri MP, 2026, Environmental microbiology, 28, 3, 1-13. A1 Journal article (refereed), original research -
Arctic and Boreal Wildfires Impact Climate by Releasing Ancient Carbon and Light-Absorbing Particles
Ruppel, Meri. M; Somero, Markus; Sippula, Olli; Ihalainen, Mika; Louhisalmi, Juho; Tissari, Jarkko; Haghipour, Negar; Ström, Johan; Väliranta, Minna; Köster, Kajar; Vakkari, Ville; Jaars, Kerneels; Huang, Lin; Smittenberg, Rienk H, 2026, Environmental science and technology, 60, 15, 11608-11620. A1 Journal article (refereed), original research -
Climate-adaptive restructuring of nitrogen inputs to mitigate global trade-offs among fertilizer use, crop yield, and N₂O emissions
Li, Jiman; Huang, Conghong; Qi, Jiaguo; Pueppke, Steve; Xi, Henghui; Ding, Xue; Luo, Jinling; Du, Fengyi; Kou, Dan; Tao, Yu; Ou, Weixin, 2026, Environmental impact assessment review, 120, 108431. A1 Journal article (refereed), original research -
Combined effects of site and model parameterization for soil respiration components in a Canadian wildfire chronosequence
Zobitz, John; Zhou, Xuan; Aaltonen, Heidi; Köster, Egle; Berninger, Frank; Pumpanen, Jukka; Köster, Kajar, 2026, Environmental data science, 5, e7. A1 Journal article (refereed), original research -
Depth-resolved carbon dioxide and methane concentrations in 522 lakes, ponds, and reservoirs worldwide
Rabaey, Joseph S.; Lewis, Abigail S. L.; Attermeyer, Katrin; Aurich, Patrick; Bansal, Sheel; Bartosiewicz, Maciej; Bertolet, Brittni L.; Bussmann, Ingeborg; Cadieux, Sarah B.; Calamita, Elisa; Capelli, Camilla; Carey, Cayelan C.; Cillero, Carmen; Clayer, Francois; D’Ambrosio, Sofia L.; Davidson, Thomas A.; Deemer, Bridget R.; Denfeld, Blaize A.; Eckert, Werner; Esposito, Chiara; Ford, Phillip; Gorsky, Adrianna; Griffiths, Natalie A.; Grossart, Hans-Peter F.; Hamilton, David P.; Holgerson, Meredi, 2026, Scientific data, 13, 483. A1 Journal article (refereed), original research -
Grassland renewal dominates multi-year nitrous oxide emissions in boreal legume grassland: Insights from eddy-covariance measurements
Li, Yuan; Thentu, Tulasi Lakshmi; Martikainen, Pertti J.; Virkajarvi, Perttu; Bhattarai, Hem Raj; Shurpali, Narasinha, 2026, Soil and tillage research, 260, 107143. A1 Journal article (refereed), original research -
Increasing Forest Ecosystem Resilience Is a Matter of Ecosystem Legacy Management: Conceptual Model for Restoration in Hemiboreal Forests
Jõgiste, Kalev; Frelich, Lee E; Vodde, Floortje; Jansons, Āris; Bāders, Endijs; Reich, Peter B; Stanturf, John A; Rebane, Sille; Köster, Kajar; Metslaid, Marek, 2026, Forests, 17, 2, 197. A2 Review article, Literature review, Systematic review -
Laboratory Experiments on Savannah and European Boreal Forest Fire Emissions
Vakkari, V; Vettikkat, L; Kommula, S; Mukherjee, A; Hao, L; Backman, J; Buchholz, A; Gawlitta, N; Ihalainen, M; Jaars, K; Köster, K; Le, V; Miettinen, P; Nissinen, A; Czech, H; Alton, M; Passig, J; Peltokorpi, S; Piedehierro, A A; Pullinen, I; Rosewig, E I; Schobesberger, S; Shukla, D; Siebert, S J; Somero, M; Virkkula, A; Welti, A; Yli-Pirilä, P; Ylisirniö, A; Zimmermann, R; van Zyl, P G; Virtanen, A; Sippula, O, 2026, Journal of geophysical research : atmospheres, 131, 7, e2025JD044543. A1 Journal article (refereed), original research -
Nitrogen Storage Change and δ15N Transitions of Peat Columns in Undrained and Forestry-drained Boreal Mires
Nykänen, Hannu; Turunen, Jukka; Tahvanainen, Teemu; Simola, Heikki; Rissanen, Antti J, 2026, Wetlands, 46, 3, 22. A1 Journal article (refereed), original research -
Peatlands Have the Potential to Emerge as Significant Contributors to Future Climate Warming
Chaudhary, Nitin; Tuovinen, Juha Pekka; Kou, Dan; Deb Burman, Pramit Kumar; Lodh, Abhishek; Lamba, Shubhangi; Shurpali, Narasinha; Schurgers, Guy; Page, Susan E.; Westermann, Sebastian; Zhang, Wenxin, 2026, Journal of geophysical research : biogeosciences, 131, 4, e2025JG009540. A1 Journal article (refereed), original research