气候变化领域集成服务门户(CCPortal): Methane emissions from Alaska in 2012 from CARVE airborne observations

CCPortal

DOI	10.1073/pnas.1412953111
	Methane emissions from Alaska in 2012 from CARVE airborne observations
	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.
发表日期	2014
ISSN	0027-8424
起始页码	16694
结束页码	16699
卷号	111 期号:47
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.
英文关键词	Alaska; Arctic; Boreal; Methane; Tundra
语种	英语
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
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159099
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 ...
推荐引用方式 GB/T 7714	Chang R.Y.-W.,Miller C.E.,Dinardo S.J.,et al. Methane emissions from Alaska in 2012 from CARVE airborne observations[J],2014,111(47).
APA	Chang R.Y.-W..,Miller C.E..,Dinardo S.J..,Karion A..,Sweeney C..,...&Wofsy S.C..(2014).Methane emissions from Alaska in 2012 from CARVE airborne observations.Proceedings of the National Academy of Sciences of the United States of America,111(47).
MLA	Chang R.Y.-W.,et al."Methane emissions from Alaska in 2012 from CARVE airborne observations".Proceedings of the National Academy of Sciences of the United States of America 111.47(2014).