EGU2020-9842
https://doi.org/10.5194/egusphere-egu2020-9842
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Carbon dynamics and full carbon balance of a Northern mire ecosystem

Patrik Vestin1, Per Weslien2, Marcus Wallin3, David Bastviken4, Natascha Kljun5, Johannes Edvardsson6, Jutta Holst1, Anders Lindroth1, Patrick Crill7, Janne Rinne1, and Leif Klemedtsson2
Patrik Vestin et al.
  • 1Lund University, Department of Physical Geography and Ecosystem Science, Lund, Sweden (patrik.vestin@nateko.lu.se)
  • 2Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden
  • 3Department of Earth Sciences, Uppsala University, Uppsala, Sweden
  • 4Department of Thematic Studies, Linköping University, Linköping, Sweden
  • 5Centre for Environmental and Climate Research, Lund University, Lund, Sweden
  • 6Department of Geology, Lund University, Lund, Sweden
  • 7Department of Geological Sciences, Stockholm University, Stockholm, Sweden

We present the Net Ecosystem Carbon Balance (NECB) of a Northern mire ecosystem for the period 2016-2019. The Mycklemossen peatland is located in the hemi-boreal region in the Southwestern part of Sweden and is classified as a fen with bog-like vegetation. The NECB was determined from eddy covariance (EC) measurements of carbon dioxide (CO2) and methane (CH4) and continuous water discharge measurements with biweekly measurements of dissolved organic carbon (DOC), dissolved inorganic carbon (DIC) and dissolved CH4.
We focus on the carbon dynamics of the Mycklemossen ecosystem during summer droughts and on its recovery during normal years. During 2016-2018, the annual precipitation was lower than the 30-year average while 2019 was a normal year in terms of weather conditions. 2018 sticks out as an extreme year with a severe drought and unusually high air temperature at Mycklemossen, as was the case in much of Northern and Central Europe.
The EC results indicate that Mycklemossen lost carbon during 2016-2018. While CH4 emissions decreased, the mire became a strong source of CO2 these years, especially 2018. There were also large losses of DOC during this period, which were further enhanced during 2019.

How to cite: Vestin, P., Weslien, P., Wallin, M., Bastviken, D., Kljun, N., Edvardsson, J., Holst, J., Lindroth, A., Crill, P., Rinne, J., and Klemedtsson, L.: Carbon dynamics and full carbon balance of a Northern mire ecosystem, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-9842, https://doi.org/10.5194/egusphere-egu2020-9842, 2020