气候变化领域集成服务门户(CCPortal): Enhanced seasonal exchange of CO2by Northern ecosystems since 1960

CCPortal

DOI	10.1126/science.1239207
	Enhanced seasonal exchange of CO2by Northern ecosystems since 1960
	Graven H.D.; Keeling R.F.; Piper S.C.; Patra P.K.; Stephens B.B.; Wofsy S.C.; Welp L.R.; Sweeney C.; Tans P.P.; Kelley J.J.; Daube B.C.; Kort E.A.; Santoni G.W.; Bent J.D.
发表日期	2013
ISSN	0036-8075
起始页码	1085
结束页码	1089
卷号	341 期号:6150
英文摘要	Seasonal variations of atmospheric carbon dioxide (CO2) in the Northern Hemisphere have increased since the 1950s, but sparse observations have prevented a clear assessment of the patterns of long-term change and the underlying mechanisms. We compare recent aircraft-based observations of CO 2 above the North Pacific and Arctic Oceans to earlier data from 1958 to 1961 and find that the seasonal amplitude at altitudes of 3 to 6 km increased by 50% for 45° to 90° N but by less than 25% for 10° to 45° N. An increase of 30 to 60% in the seasonal exchange of CO2 by northern extratropical land ecosystems, focused on boreal forests, is implicated, substantially more than simulated by current land ecosystem models. The observations appear to signal large ecological changes in northern forests and a major shift in the global carbon cycle.
英文关键词	carbon dioxide; amplitude; Boreal; carbon cycle; carbon dioxide; data acquisition; ecosystem modeling; long-term change; Northern Hemisphere; seasonal variation; aircraft; altitude; Arctic; article; atmospheric pressure; atmospheric transport; carbon cycle; controlled study; ecosystem; latitude; Northern Hemisphere; Pacific Ocean; priority journal; seasonal variation; simulation; taiga; Arctic; Pacific Ocean; Pacific Ocean (North)
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243862
作者单位	Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States; Research Institute for Global Change, Yokohama, Japan; National Center for Atmospheric Research, Boulder, CO, United States; School of Engineering and Applied Science, Harvard University, Cambridge, MA, United States; National Oceanic and Atmospheric Administration, Boulder, CO, United States; Institute of Marine Science, University of Alaska, Fairbanks, Fairbanks, AK, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI, United States
推荐引用方式 GB/T 7714	Graven H.D.,Keeling R.F.,Piper S.C.,et al. Enhanced seasonal exchange of CO2by Northern ecosystems since 1960[J],2013,341(6150).
APA	Graven H.D..,Keeling R.F..,Piper S.C..,Patra P.K..,Stephens B.B..,...&Bent J.D..(2013).Enhanced seasonal exchange of CO2by Northern ecosystems since 1960.Science,341(6150).
MLA	Graven H.D.,et al."Enhanced seasonal exchange of CO2by Northern ecosystems since 1960".Science 341.6150(2013).