CO2 and CH4 exchanges between land ecosystems and the atmosphere in northern high latitudes over the 21st century


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dc.contributor.author Zhuang, Qianlai
dc.contributor.author Melillo, Jerry M.
dc.contributor.author Sarofim, Marcus C.
dc.contributor.author Kicklighter, David W.
dc.contributor.author McGuire, A. David
dc.contributor.author Felzer, Benjamin S.
dc.contributor.author Sokolov, Andrei P.
dc.contributor.author Prinn, Ronald G.
dc.contributor.author Steudler, Paul A.
dc.contributor.author Hu, Shaomin
dc.date.accessioned 2006-10-16T16:51:10Z
dc.date.available 2006-10-16T16:51:10Z
dc.date.issued 2006-09-15
dc.identifier.uri http://hdl.handle.net/1912/1264
dc.description Author Posting. © American Geophysical Union, 2006. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 33 (2006): L17403, doi:10.1029/2006GL026972. en
dc.description.abstract Terrestrial ecosystems of the northern high latitudes (above 50oN) exchange large amounts of CO2 and CH4 with the atmosphere each year. Here we use a process-based model to estimate the budget of CO2 and CH4 of the region for current climate conditions and for future scenarios by considering effects of permafrost dynamics, CO2 fertilization of photosynthesis and fire. We find that currently the region is a net source of carbon to the atmosphere at 276 Tg C yr-1. We project that throughout the 21st century, the region will most likely continue as a net source of carbon and the source will increase by up to 473 Tg C yr-1 by the end of the century compared to the current emissions. However our coupled carbon and climate model simulations show that these emissions will exert relatively small radiative forcing on global climate system compared to large amounts of anthropogenic emissions. en
dc.description.sponsorship This study was supported by a NSF Biocomplexity (ATM-0120468) and ARCSS programs; the NASA Land Cover and Land Use Change and EOS Interdisciplinary Science (NNG04GJ80G) programs; and by funding from MIT Joint Program on the Science and Policy of Global Change, which is supported by a consortium of government, industry and foundation sponsors. en
dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.language.iso en_US en
dc.publisher American Geophysical Union
dc.relation.uri http://dx.doi.org/10.1029/2006GL026972
dc.title CO2 and CH4 exchanges between land ecosystems and the atmosphere in northern high latitudes over the 21st century en
dc.type Article en
dc.identifier.doi 10.1029/2006GL026972

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