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Factors controlling large scale variations in methane emissions from wetlands
Department of Physical Geography and Ecosystem Analysis, GeoBiosphere Science Centre, Lund University, Sweden
Department of Physical Geography and Ecosystem Analysis, GeoBiosphere Science Centre, Lund University, Sweden
Department of Physical Geography and Ecosystem Analysis, GeoBiosphere Science Centre, Lund University, Sweden
Department of Physical Geography and Ecosystem Analysis, GeoBiosphere Science Centre, Lund University, Sweden
Department of Chemistry and Chemical Biology, Stevens Institute of Technology, New Jersey, USA
Department of Water and Environmental Studies, Linköping University, Linköping, Sweden
Department of Water and Environmental Studies, Linköping University, Linköping, Sweden
Department of Environmental Sciences, University of Kuopio, Kuopio, Finland
Department of Environmental Sciences, University of Kuopio, Kuopio, Finland
RALA - Agricultural Research Institute, Reykjavik, Iceland
Global wetlands are, at estimate ranging 115–237 Tg CH4/yr, the largest single atmospheric source of the greenhouse gas methane (CH4). We present a dataset on CH4 flux rates totaling 12 measurement years at sites from Greenland, Iceland, Scandinavia and Siberia. We find that temperature and microbial substrate availability (expressed as the organic acid concentration in peat water) combined explain almost 100% of the variations in mean annual CH4 emissions. The temperature sensitivity of the CH4 emissions shown suggests a feedback mechanism on climate change that could validate incorporation in further developments of global circulation models.
Published 12 April 2003.
Citation: (2003), Factors controlling large scale variations in methane emissions from wetlands, Geophys. Res. Lett., 30(7), 1414, doi:10.1029/2002GL016848.
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