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Carbon fluxes of tundra wetlands in Northeastern Siberia on a landscape scale: relations with permafrost and floodplain dynamics
Project leader: Prof. dr. A. J. Dolman
Researcher(s): Dr. F. J. W. Parmentier
Starting date: 1-sep-06

Abstract
Present global warming has its strongest effects in the arctic, with large changes in mean annual temperature and quantity and timing of precipitation. The carbon balance from boreal and arctic regions is expected to change strongly as a result of this climate change. Arctic soil may already have become a source of carbon. In particular methane fluxes from northern wetland areas may increase as a result of soil warming and permafrost degradation. This creates a strong positive feedback with climate change. Various processes contribute to changes of the carbon cycle: changes of primary production, soil temperature and moisture, permafrost degradation and fluvial discharge regime. In this project, we intend to study the greenhouse gas (GHG) fluxes, in particular methane and carbon dioxide, on a landscape scale and at inter-annual timescales at a site in the northeastern Siberian Indigirka Lowlands. This is a region from which quantitative data are scarce. Emphasis is laid on the interaction between the different processes and their spatial variability. This includes interactions of the CH4 flux with permafrost dynamics and fluxes from thaw lakes and the trade of between potential enhanced carbon uptake versus methane production.

Publications
Van der Molen, M.K., Van Huissteden, J., Parmentier, F.J.W., Petrescu, A.M.R., Dolman, A.J., Maximov (2007). The growing season greenhouse gas balance of a continental tundra site in the Indigirka lowlands, NE Siberia . Biogeosciences4: 985-1003.
Darwin Center authors: Dolman A. J., van Huissteden J., Parmentier F. J. W.

Van der Molen, M.K., Van Huissteden, J., Parmentier, F.J.W.,  De Jeu, R.A.M., Holmes, T.R.H., Dolman, A.J. (2008). Greenhouse gas fluxes at a continental tundra site in NE Siberia and radiative forcing of advancing of the growing season .
Darwin Center authors: Dolman A. J., van Huissteden J., Parmentier F. J. W.

F. J. W. Parmentier, J. van Huissteden, N. Kip, H. J. M. Op den Camp, M. S. M. Jetten, T. C. Maximov, and A. J. Dolman (2010). The role of endophytic methane oxidizing bacteria in submerged Sphagnum in determining methane emissions of Northeastern Siberian tundra. Biogeosciences Discussions7: 8521-8551.
Darwin Center authors: op den Camp H. J. M., Dolman A. J., van Huissteden J., Jetten M. S. M., Kip D. J., Parmentier F. J. W.

Parmentier, F.J.W., Van Huissteden, J., Kip, N., Op Den Camp, H.J.M., Jetten, M.S.M., Maximov, T.C., Dolman, A.J. (2011). The role of endophytic methane-oxidizing bacteria in submerged Sphagnum in determining methane emissions of Northeastern Siberian tundra . BiogeosciencesVolume 8, Issue 5: 1267-1278.
Darwin Center authors: op den Camp H. J. M., Dolman A. J., van Huissteden J., Jetten M. S. M., Kip D. J., Parmentier F. J. W.

Parmentier, F.J.W. , Van Huissteden, J., Van Der Molen, M.K., Schaepman-Strub, G., Karsanaev, S.A., Maximov, T.C , Dolman, A.J. (2011). Spatial and temporal dynamics in eddy covariance observations of methane fluxes at a tundra site in northeastern Siberia . Journal of Geophysical Research G: BiogeosciencesVolume 116, Issue 3:
Darwin Center authors: Dolman A. J., van Huissteden J., Parmentier F. J. W.

Parmentier, F.J.W. , Van Der Molen, M.K., Van Huissteden, J., Karsanaev, S.A., Kononov, A.V., Suzdalov, D.A., Maximov, T.C., Dolman, A.J. (2011). Longer growing seasons do not increase net carbon uptake in the northeastern Siberian tundra . Journal of Geophysical Research G: BiogeosciencesVolume 116, Issue 4:
Darwin Center authors: Dolman A. J., van Huissteden J., Parmentier F. J. W.

J. van Huissteden, C. Berrittella, F. J. W. Parmentier, Y. Mi, T. C. Maximov & A. J. Dolman (2011). Methane emissions from permafrost thaw lakes limited by lake drainage . Nature Climate Change1: 119-123.
Darwin Center authors: Dolman A. J., van Huissteden J., Parmentier F. J. W.