EGU General Assembly 2020
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regional greenhouse gas (GHG) budget of Kokemäenjoki river basin, SW Finland

Terhi Rasilo1, Maria Holmberg2, Anu Akujärvi2, Saku Anttila2, Iida Autio2, Niko Karvosenoja2, Pirkko Kortelainen2, Aleksi Lehtonen3, Annikki Mäkelä1, Francesco Minunno1, Paavo Ojanen1, Ville-Veikko Paunu2, Mikko Peltoniemi3, Katri Rankinen2, Tapani Sallantaus2, Mikko Savolahti2, Sakari Tuominen3, Seppo Tuominen2, Pekka Vanhala2, and Martin Forsius2
Terhi Rasilo et al.
  • 1University of Helsinki, Helsinki, Finland
  • 2Finnish Environment Institute (SYKE), Helsinki, Finland
  • 3National Resources Institute (Luke), Helsinki, Finland

Natural ecosystems play an important role in regulating greenhouse gas (GHG) fluxes between land and water surfaces and the atmosphere. To evaluate the full GHG balance of a region, fluxes from natural ecosystems such as undrained mires, lakes and rivers, should be included in the GHG accounting together with fluxes from forestry, agricultural and anthropogenic activities. We present a method for collating regional GHG balances including natural ecosystem processes, to support strategies for climate change mitigation and adaptation. Our study area is Kokemäenjoki river basin (SW Finland), which includes two eLTER sites (Lammi and Hyytiälä/SMEAR). Empirical data of these sites are used for model developments and calibrations as well as regional extrapolation. We report spatially explicit estimates on sources and sinks of GHG such as carbon dioxide and methane, and nitrous oxide for some ecosystems, and aggregate the regional balance from vertical fluxes of these elements. Spatial data sources include CORINE land use data, soil map, lake and rivers shorelines, national forest inventory data, as well as statistical data on anthropogenic activities. The regionally aggregated vertical balance will be compared to observed total lateral flux to the Bothnian Sea. We quantify the fluxes on the basis of empirical evidence from eLTER site information, literature, as well as on calculations with a forest growth and gas exchange model (PREBAS).


Acknowledgements and funding:

Irina Bergström, Markus Haakana, Antti Ihalainen and Kari Minkkinen

eLTER H2020 GA 654359

IBC-Carbon Academy of Finland SRC 2017/312559

SOMPA Academy of Finland SRC 2017/312912


Freshabit LIFE IP LIFE14/IPE/FI/023

How to cite: Rasilo, T., Holmberg, M., Akujärvi, A., Anttila, S., Autio, I., Karvosenoja, N., Kortelainen, P., Lehtonen, A., Mäkelä, A., Minunno, F., Ojanen, P., Paunu, V.-V., Peltoniemi, M., Rankinen, K., Sallantaus, T., Savolahti, M., Tuominen, S., Tuominen, S., Vanhala, P., and Forsius, M.: Regional greenhouse gas (GHG) budget of Kokemäenjoki river basin, SW Finland, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-13698,, 2020

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