Articles | Volume 18, issue 3
https://doi.org/10.5194/bg-18-873-2021
https://doi.org/10.5194/bg-18-873-2021
Research article
 | 
05 Feb 2021
Research article |  | 05 Feb 2021

Carbon dioxide and methane exchange of a patterned subarctic fen during two contrasting growing seasons

Lauri Heiskanen, Juha-Pekka Tuovinen, Aleksi Räsänen, Tarmo Virtanen, Sari Juutinen, Annalea Lohila, Timo Penttilä, Maiju Linkosalmi, Juha Mikola, Tuomas Laurila, and Mika Aurela

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Cited articles

Alm, J., Talanov, A., Saarnio, S., Silvola, J., Ikkonen, E., Aaltonen, H., Nykänen, H., and Martikainen, P. J.: Reconstruction of the Carbon Balance for Microsites in a Boreal Oligotrophic Pine Fen, Finland, Oecologia, 110, 423–431, https://doi.org/10.1007/s004420050177, 1997. 
Alm, J., Schulman, L., Walden, J., Nykänen, H., Martikainen, P. J., and Silvola, J.: Carbon Balance of a Boreal Bog during a Year with an Exceptionally Dry Summer, Ecology, 80, 161–174, https://doi.org/10.1890/0012-9658(1999)080[0161:CBOABB]2.0.CO;2, 1999. 
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Aurela, M., Tuovinen, J.-P., and Laurila, T.: Carbon dioxide exchange in a subarctic peatland ecosystem in northern Europe measured by the eddy covariance technique, J. Geophys. Res.-Atmos., 103, 11289–11301, https://doi.org/10.1029/98JD00481, 1998. 
Aurela, M., Laurila, T., and Tuovinen, J.-P: Seasonal CO2 balances of a subarctic mire, J. Geophys. Res.-Atmos., 106, 1623–1637, https://doi.org/10.1029/2000JD900481, 2001. 
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Short summary
We studied ecosystem- and plant-community-level carbon (C) exchange between subarctic mire and the atmosphere during 2017–2018. We found strong spatial variation in CO2 and CH4 dynamics between the main plant communities. The earlier onset of growing season in 2018 strengthened the CO2 sink of the ecosystem, but this gain was counterbalanced by a later drought period. Variation in water table level, soil temperature and vegetation explained most of the variation in ecosystem-level C exchange.
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