气候变化领域集成服务门户(CCPortal): Atmospheric science: Unexpected changes to the global methane budget over the past 2000 years

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DOI	10.1126/science.1115193
	Atmospheric science: Unexpected changes to the global methane budget over the past 2000 years
	Ferretti D.F.; Miller J.B.; White J.W.C.; Etheridge D.M.; Lassey K.R.; Lowe D.C.; MacFarling Meure C.M.; Dreier M.F.; Trudinger C.M.; Van Ommen T.D.; Langenfelds R.L.
发表日期	2005
ISSN	0036-8075
起始页码	1714
结束页码	1717
卷号	309 期号:5741
英文摘要	We report a 2000-year Antarctic ice-core record of stable carbon isotope measurements in atmospheric methane (δ13CH4). Large δ13CH4 variations indicate that the methane budget varied unexpectedly during the late preindustrial Holocene (circa 0 to 1700 A.D.). During the first thousand years (0 to 1000 A.D.), δ 13CH4 was at least 2 per mil enriched compared to expected values, and during the following 700 years, an about 2 per mil depletion occurred. Our modeled methane source partitioning implies that biomass burning emissions were high from 0 to 1000 A.D. but reduced by almost ∼40% over the next 700 years. We suggest that both human activities and natural climate change influenced preindustrial biomass burning emissions and that these emissions have been previously understated in late preindustrial Holocene methane budget research.
英文关键词	Biomass; Carbon; Climate change; Gas emissions; Isotopes; Mathematical models; Biomass burning emissions; Holocene; Methane; carbon; methane; stable isotope; atmospheric chemistry; climate change; methane; Antarctica; article; atmosphere; biomass; climate; combustion; global change; Late Holocene; priority journal; research
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/243687
作者单位	Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80309, United States; National Institute of Water and Atmospheric Research Limited (NIWA), Post Office Box 14901, Wellington, New Zealand; National Oceanic and Atmospheric Administration (NOAA), R/CMDL1, 325 Broadway, Boulder, CO 80305, United States; Commonwealth Scientific and Industrial Research Organisation (CSIRO), Marine and Atmospheric Research, Private Bag 1, Aspendale, Vic. 3195, Australia; Department of the Environment and Heritage, Australian Antarctic Division, Antarctic Climate and Ecosystems CRC, Private Bag 80, Hobart, Tasmania 7001, Australia
推荐引用方式 GB/T 7714	Ferretti D.F.,Miller J.B.,White J.W.C.,et al. Atmospheric science: Unexpected changes to the global methane budget over the past 2000 years[J],2005,309(5741).
APA	Ferretti D.F..,Miller J.B..,White J.W.C..,Etheridge D.M..,Lassey K.R..,...&Langenfelds R.L..(2005).Atmospheric science: Unexpected changes to the global methane budget over the past 2000 years.Science,309(5741).
MLA	Ferretti D.F.,et al."Atmospheric science: Unexpected changes to the global methane budget over the past 2000 years".Science 309.5741(2005).