Thawing sub-arctic permafrost: Effects on vegetation and methane emissions
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 al...
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Published in | Geophysical research letters Vol. 31; no. 4; pp. L04501 - n/a |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
American Geophysical Union
01.02.2004
Blackwell Publishing Ltd |
Subjects | |
Online Access | Get full text |
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Summary: | 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. |
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Bibliography: | istex:BAE603B5772B3077251D60A8B6C48F1C577B1372 ark:/67375/WNG-0WWBWSML-F ArticleID:2003GL018680 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 0094-8276 1944-8007 1944-8007 |
DOI: | 10.1029/2003GL018680 |