气候变化领域集成服务门户(CCPortal): Enhanced tropical methane production in response to iceberg discharge in the North Atlantic

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DOI	10.1126/science.1262005
	Enhanced tropical methane production in response to iceberg discharge in the North Atlantic
	Rhodes R.H.; Brook E.J.; Chiang J.C.H.; Blunier T.; Maselli O.J.; McConnell J.R.; Romanini D.; Severinghaus J.P.
发表日期	2015
ISSN	0036-8075
起始页码	1016
结束页码	1019
卷号	348 期号:6238
英文摘要	The causal mechanisms responsible for the abrupt climate changes of the Last Glacial Period remain unclear. One major difficulty is dating ice-rafted debris deposits associated with Heinrich events: Extensive iceberg influxes into the North Atlantic Ocean linked to global impacts on climate and biogeochemistry. In a new ice core record of atmospheric methane with ultrahigh temporal resolution, we find abrupt methane increases within Heinrich stadials 1, 2, 4, and 5 that, uniquely, have no counterparts in Greenland temperature proxies. Using a heuristic model of tropical rainfall distribution, we propose that Hudson Strait Heinrich events caused rainfall intensification over Southern Hemisphere land areas, thereby producing excess methane in tropical wetlands. Our findings suggest that the climatic impacts of Heinrich events persisted for 740 to 1520 years.
英文关键词	methane; rain; biogeochemistry; global climate; Heinrich event; iceberg; Last Glacial; methane; precipitation intensity; Southern Hemisphere; wetland; Article; Atlantic Ocean; Greenland; ice core record; iceberg; Northern Hemisphere; priority journal; Southern Hemisphere; summer; tropic climate; wetland; Atlantic Ocean; Atlantic Ocean (North); Canada; Hudson Strait
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/245211
作者单位	College of Earth, Ocean,and Atmospheric Sciences, 104 CEOAS Administration, Oregon State University, Corvallis, OR 97331, United States; Department of Geography, Berkeley Atmospheric Sciences Center, University of California, Berkeley, CA, United States; Center for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark; Division of Hydrologic Sciences, Desert Research Institute, 2215 Raggio Parkway, Reno, NV 89512, United States; Joseph Fourier University-Grenoble 1, CNRS, LIPhy UMR 5588, Grenoble, F-38041, France; Scripps Institution of Oceanography, University of California, 9500 Gilman Drive, San Diego, La Jolla, CA 92093-0244, United States
推荐引用方式 GB/T 7714	Rhodes R.H.,Brook E.J.,Chiang J.C.H.,et al. Enhanced tropical methane production in response to iceberg discharge in the North Atlantic[J],2015,348(6238).
APA	Rhodes R.H..,Brook E.J..,Chiang J.C.H..,Blunier T..,Maselli O.J..,...&Severinghaus J.P..(2015).Enhanced tropical methane production in response to iceberg discharge in the North Atlantic.Science,348(6238).
MLA	Rhodes R.H.,et al."Enhanced tropical methane production in response to iceberg discharge in the North Atlantic".Science 348.6238(2015).