Other
Scientific paper
Feb 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3104501c&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 4, CiteID L04501
Other
53
Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions, Global Change: Atmosphere (0315, 0325), Global Change: Biogeochemical Processes (4805), Hydrology: Groundwater Transport, Hydrology: Wetlands
Scientific paper
Ecosystems along the 0°C mean annual isotherm are arguably among the most sensitive to changing climate and mires in these regions emit significant amounts of the important greenhouse gas methane (CH4) to the atmosphere. These CH4 emissions are intimately related to temperature and hydrology, and alterations in permafrost coverage, which affect both of those, could have dramatic impacts on the emissions. Using a variety of data and information sources from the same region in subarctic Sweden we show that mire ecosystems are subject to dramatic recent changes in the distribution of permafrost and vegetation. These changes are most likely caused by a warming, which has been observed during recent decades. A detailed study of one mire show that the permafrost and vegetation changes have been associated with increases in landscape scale CH4 emissions in the range of 22-66% over the period 1970 to 2000.
Åkerman Jonas H.
Christensen Torben R.
Crill Patrick
Friborg Thomas
Johansson Torbjörn
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