Monitoring the Multi-Year Carbon Balance of a Subarctic Palsa Mire with Micrometeorological Techniques
- 545 Downloads
This article reports a dataset on 8 years of monitoring carbon fluxes in a subarctic palsa mire based on micrometeorological eddy covariance measurements. The mire is a complex with wet minerotrophic areas and elevated dry palsa as well as intermediate sub-ecosystems. The measurements document primarily the emission originating from the wet parts of the mire dominated by a rather homogenous cover of Eriophorum angustifolium. The CO2/CH4 flux measurements performed during the years 2001–2008 showed that the areas represented in the measurements were a relatively stable sink of carbon with an average annual rate of uptake amounting to on average −46 g C m−2 y−1 including an equally stable loss through CH4 emissions (18–22 g CH4–C m−2 y−1). This consistent carbon sink combined with substantial CH4 emissions is most likely what is to be expected as the permafrost under palsa mires degrades in response to climate warming.
KeywordsCarbon cycling Subarctic mire Permafrost Land–atmosphere exchange Climate change
The presented study was supported by the EU funded GREENCYCLES-RTN. The Stordalen mire tower has also seen support of Swedish Research Councils VR and FORMAS, the Danish Natural Science Research Council as well as the Crafoord foundation and the Royal Swedish Physiographical Society. The authors are grateful to the staff at the Abisko Scientific Research Station, in particular the former Director Terry V. Callaghan, for invaluable support through the years in multiple aspects of the work at Stordalen.
- Aurela, M. 2005. Carbon dioxide exchange in subarctic ecosystems measured by micrometeorological technique. Finnish Meteorological Institute Contributions 51, PhD dissertation, Finnish Meteorological Institute, Helsinki.Google Scholar
- Bosiö, J., M. Johansson, T.V. Callaghan, B. Johansson, and T.R. Christensen. 2012. Future vegetation changes in thawing subarctic mires and implications for greenhouse gas exchange—a regional assessment. Climatic Change. doi: 10.1007/s10584-012-0445-1.
- Christensen, T.R., T. Johansson, M. Olsrud, L. Ström, A. Lindroth, M. Mastepanov, N. Malmer, T. Friborg, et al. 2007. A catchment-scale carbon and greenhouse gas budget of a subarctic landscape. Philosophical Transactions of the Royal Society A: Physical, Mathematical and Engineering Sciences 365: 1643–1656. doi: 10.1098/rsta.2007.2035.CrossRefGoogle Scholar
- Foken, T., M. Göckede, M. Mauder, L. Mahrt, B. Amiro, and W. Munger. 2004. Post-field data quality control. In Handbook of micrometeorology: A guide for surface flux measurements, ed. X. Lee, W. Massman, and B.E. Law, 181–208. Dordrecht: Kluwer.Google Scholar
- Grøndahl, L., T. Friborg, T. Christensen, A. Ekberg, B. Elberling, L. Illeris, C. Nordstrøm, Å. Rennermalm, et al. 2008. Spatial and interannual variability of trace gas fluxes in a heterogeneous high arctic landscape, high-arctic ecosystem dynamics in a changing climate—ten years of monitoring and research at Zackenberg Research Station, Northeast Greenland. Advances in Ecological Research 40: 473–498.CrossRefGoogle Scholar
- Heliasz, M., T. Johansson, A. Lindroth, M. Mölder, M. Mastepanov, T. Friborg, T.V. Callaghan, and T.R. Christensen. 2011. Quantification of C uptake in subarctic birch forest after setback by an extreme insect outbreak. Geophysical Research Letters 38: L01704. doi: 10.1029/2010GL044733.CrossRefGoogle Scholar
- Johansson, T., N. Malmer, P.M. Crill, T. Friborg, J.H. Akerman, M. Mastepanov, and T.R. Christensen. 2006. Decadal vegetation changes in a northern peatland, greenhouse gas fluxes and net radiative forcing. Global Change Biology 12: 2352–2369. doi: 10.1111/j.1365-2486.2006.01267.x.CrossRefGoogle Scholar
- Karlsson, J., T.R. Christensen, P. Crill, J. Forster, D. Hammarlund, M. Jackowicz-Korczyński, U. Kokfelt, C. Roehm, and P. Rosen. 2010. Quantifying the relative importance of lake emissions in the carbon budget of a subarctic catchment. Journal of Geophysical Research-Biogeosciences 115: G03006. doi: 10.1029/2010JG001305.CrossRefGoogle Scholar
- Parmentier, F.J.W., M.K. van der Molen, J. van Huissteden, S.A. Karsanaev, A.V. Kononov, D.A. Suzdalov, T.C. Maximov, and A.J. Dolman. 2011. Longer growing seasons do not increase net carbon uptake in the northeastern Siberian tundra. Journal of Geophysical Research 116: G04013. doi: 10.1029/2011JG001653.CrossRefGoogle Scholar
- Sollid, J.L., and L. Sørbel. 1998. Palsa bogs as a climatic indicator—examples from Dovrefjell, Southern Norway. AMBIO 27: 287–291.Google Scholar