Impacts of climate change on methane emissions from wetlands
Article first published online: 2 NOV 2004
Copyright 2004 by the American Geophysical Union.
Geophysical Research Letters
Volume 31, Issue 21, November 2004
How to Cite
2004), Impacts of climate change on methane emissions from wetlands, Geophys. Res. Lett., 31, L21202, doi:10.1029/2004GL021009., , and (
- Issue published online: 2 NOV 2004
- Article first published online: 2 NOV 2004
- Manuscript Accepted: 6 OCT 2004
- Manuscript Revised: 15 SEP 2004
- Manuscript Received: 13 JUL 2004
 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 CO2 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.