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Impacts of climate change on methane emissions from wetlands
Author(s) -
Shindell Drew T.,
Walter Bernadette P.,
Faluvegi Greg
Publication year - 2004
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl021009
Subject(s) - wetland , environmental science , climate change , methane , global warming , greenhouse gas , methane emissions , latitude , climate model , atmospheric sciences , climatology , atmospheric methane , geography , ecology , oceanography , geology , geodesy , biology
We have included climate‐sensitive methane emissions from wetlands within the GISS climate model using a linear parameterization derived from a detailed process model. The geographic distribution of wetlands is also climate–dependent. Doubled CO 2 simulations using this model show an increase in annual average wetland methane emissions from 156 to 277 Tg/yr, a rise of 78%. The bulk of this increase is due to enhanced emissions from existing tropical wetlands. Additionally, high northern latitude wetland areas expand and emissions nearly triple during Northern summer. The global increase represents ∼20% of present‐day inventories. These large values indicate that the potential response of natural emissions to climate change merit greater study, and should be included in projections of future global warming and tropospheric pollution.