气候变化领域集成服务门户(CCPortal): Coherent changes of southeastern equatorial and northern African rainfall during the last deglaciation

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DOI	10.1126/science.1259531
	Coherent changes of southeastern equatorial and northern African rainfall during the last deglaciation
	Otto-Bliesner B.L.; Russell J.M.; Clark P.U.; Liu Z.; Overpeck J.T.; Konecky B.; Demenocal P.; Nicholson S.E.; He F.; Lu Z.
发表日期	2014
ISSN	0036-8075
起始页码	1223
结束页码	1227
卷号	346 期号:6214
英文摘要	During the last deglaciation, wetter conditions developed abruptly ∼14,700 years ago in southeastern equatorial and northern Africa and continued into the Holocene. Explaining the abrupt onset and hemispheric coherence of this early African Humid Period is challenging due to opposing seasonal insolation patterns. In this work, we use a transient simulation with a climate model that provides a mechanistic understanding of deglacial tropical African precipitation changes. Our results show that meltwater-induced reduction in the Atlantic meridional overturning circulation (AMOC) during the early deglaciation suppressed precipitation in both regions. Once the AMOC reestablished, wetter conditions developed north of the equator in response to high summer insolation and increasing greenhouse gas (GHG) concentrations, whereas wetter conditions south of the equator were a response primarily to the GHG increase.
英文关键词	rain; Atlantic Multidecadal Oscillation; climate modeling; insolation; last deglaciation; paleoclimate; rainfall; seasonal variation; simulation; Africa; african humid period; Article; atlantic meridional overturning circulation; climate; climate change; deglaciation; falling; global climate; greenhouse gas; Holocene; humidity; ice sheet; moisture; North Africa; precipitation; sea; sea surface temperature; seasonal variation; sediment; southeastern equatorial africa; spring; summer; sunlight; vegetation; winter; freezing; greenhouse effect; ice cover; Africa; Africa, Northern; Freezing; Global Warming; Greenhouse Effect; Ice Cover; Rain
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/244964
作者单位	Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, CO 80307-3000, United States; Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912, United States; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, United States; Center for Climatic Research, Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI 53706, United States; Laboratory for Climate, Ocean and Atmosphere Studies, School of Physics, Peking University, Beijing, 100871, China; Department of Geosciences, Institute of the Environment, University of Arizona, Tucson, AZ 85721, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309, United States; Department of Earth and Environmental Sciences, Columbia University, New York, NY 10027, United States; Department of Earth, Ocean, and Atmospheric Science, Florida ...
推荐引用方式 GB/T 7714	Otto-Bliesner B.L.,Russell J.M.,Clark P.U.,et al. Coherent changes of southeastern equatorial and northern African rainfall during the last deglaciation[J],2014,346(6214).
APA	Otto-Bliesner B.L..,Russell J.M..,Clark P.U..,Liu Z..,Overpeck J.T..,...&Lu Z..(2014).Coherent changes of southeastern equatorial and northern African rainfall during the last deglaciation.Science,346(6214).
MLA	Otto-Bliesner B.L.,et al."Coherent changes of southeastern equatorial and northern African rainfall during the last deglaciation".Science 346.6214(2014).