globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1412953111
论文题名:
Methane emissions from Alaska in 2012 from CARVE airborne observations
作者: Chang R.Y.-W.; Miller C.E.; Dinardo S.J.; Karion A.; Sweeney C.; Daube B.C.; Henderson J.M.; Mountain M.E.; Eluszkiewicz J.; Miller J.B.; Bruhwiler L.M.P.; Wofsy S.C.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2014
卷: 111, 期:47
起始页码: 16694
结束页码: 16699
语种: 英语
英文关键词: Alaska ; Arctic ; Boreal ; Methane ; Tundra
Scopus关键词: methane ; air pollution ; air sampling ; airborne particle ; Article ; atmospheric dispersion ; forecasting ; growing season ; measurement ; seasonal variation ; spring ; surface property ; United States ; weather ; wetland
英文摘要: We determined methane (CH4) emissions from Alaska using airborne measurements from the Carbon Arctic Reservoirs Vulnerability Experiment (CARVE). Atmospheric sampling was conducted between May and September 2012 and analyzed using a customized version of the polar weather research and forecast model linked to a Lagrangian particle dispersion model (stochastic timeinverted Lagrangian transport model). We estimated growing season CH4 fluxes of 8 ± 2 mg CH4·m-2·d-1 averaged over all of Alaska, corresponding to fluxes from wetlands of 56+22-13 mg CH4·m-2·d-1 if we assumed that wetlands are the only source from the land surface (all uncertainties are 95% confidence intervals from a bootstrapping analysis). Fluxes roughly doubled from May to July, then decreased gradually in August and September. Integrated emissions totaled 2.1 ± 0.5 Tg CH4 for Alaska from May to September 2012, close to the average (2.3; a range of 0.7 to 6 Tg CH4) predicted by various land surface models and inversion analyses for the growing season. Methane emissions from boreal Alaska were larger than from the North Slope; the monthly regional flux estimates showed no evidence of enhanced emissions during early spring or late fall, although these bursts may be more localized in time and space than can be detected by our analysis. These results provide an important baseline to which future studies can be compared.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162367
Appears in Collections:气候变化与战略

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作者单位: Chang, R.Y.-W., School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States, Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS B3H 4R2, Canada; Miller, C.E., Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States; Dinardo, S.J., Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States; Karion, A., Global Monitoring Division, National Oceanic and Atmospheric Administration Earth System Research Laboratory, Boulder, CO 80305, United States, Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, United States; Sweeney, C., Global Monitoring Division, National Oceanic and Atmospheric Administration Earth System Research Laboratory, Boulder, CO 80305, United States, Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, United States; Daube, B.C., School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States; Henderson, J.M., Atmospheric and Environmental Research, Inc., Lexington, MA 02421, United States; Mountain, M.E., Atmospheric and Environmental Research, Inc., Lexington, MA 02421, United States; Eluszkiewicz, J., Atmospheric and Environmental Research, Inc., Lexington, MA 02421, United States; Miller, J.B., Global Monitoring Division, National Oceanic and Atmospheric Administration Earth System Research Laboratory, Boulder, CO 80305, United States, Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, United States; Bruhwiler, L.M.P., Global Monitoring Division, National Oceanic and Atmospheric Administration Earth System Research Laboratory, Boulder, CO 80305, United States; Wofsy, S.C., School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States

Recommended Citation:
Chang R.Y.-W.,Miller C.E.,Dinardo S.J.,et al. Methane emissions from Alaska in 2012 from CARVE airborne observations[J]. Proceedings of the National Academy of Sciences of the United States of America,2014-01-01,111(47)
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