气候变化领域集成服务门户(CCPortal): Iceberg discharges of the last glacial period driven by oceanic circulation changes

CCPortal

DOI	10.1073/pnas.1306622110
	Iceberg discharges of the last glacial period driven by oceanic circulation changes
	Alvarez-Solas J.; Robinson A.; Montoya M.; Ritz C.
发表日期	2013
ISSN	0027-8424
起始页码	16350
结束页码	16354
卷号	110 期号:41
英文摘要	Proxy data reveal the existence of episodes of increased deposition of ice-rafted detritus in the North Atlantic Ocean during the last glacial period interpreted as massive iceberg discharges from the Laurentide Ice Sheet. Although these have long been attributed to self-sustained ice sheet oscillations, growing evidence of the crucial role that the ocean plays both for past and future behavior of the cryosphere suggests a climatic control of these ice surges. Here, we present simulations of the last glacial period carried out with a hybrid ice sheet-ice shelf model forced by an oceanic warming index derived from proxy data that accounts for the impact of past ocean circulation changes on ocean temperatures. The model generates a time series of iceberg discharge that closely agrees with ice-rafted debris records over the past 80 ka, indicating that oceanic circulation variations were responsible for the enigmatic ice purges of the last ice age.
英文关键词	Abrupt changes; Climate modeling; Glacial climate variability
语种	英语
scopus关键词	article; circulation; glacial period; hybrid; ice age; ice sheet; ice shelf; iceberg; priority journal; sea; simulation; temperature; time series analysis; warming; abrupt changes; climate modeling; glacial climate variability; Atlantic Ocean; Climate Change; Computer Simulation; Ice Cover; Models, Theoretical; Water Movements
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/158927
作者单位	Alvarez-Solas, J., Universidad Complutense de Madrid, 28040 Madrid, Spain, Instituto de Geociencias, Consejo Superior de Investigaciones Científicas-Universidad Complutense de Madrid, 28040 Madrid, Spain; Robinson, A., Universidad Complutense de Madrid, 28040 Madrid, Spain, Instituto de Geociencias, Consejo Superior de Investigaciones Científicas-Universidad Complutense de Madrid, 28040 Madrid, Spain; Montoya, M., Universidad Complutense de Madrid, 28040 Madrid, Spain, Instituto de Geociencias, Consejo Superior de Investigaciones Científicas-Universidad Complutense de Madrid, 28040 Madrid, Spain; Ritz, C., Laboratoire de Glaciologie et de Géophysique de L'Environnement, Centre National de la Recherche Scientifique (Unité Mixte de Recherche 5183), F-38041 Grenoble, France, Université Grenoble Alpes, Laboratoire de Glaciologie et de Geophysique de L'Environnement (Unite Mixte de Recherche 5183), F-38041 Grenoble, France
推荐引用方式 GB/T 7714	Alvarez-Solas J.,Robinson A.,Montoya M.,et al. Iceberg discharges of the last glacial period driven by oceanic circulation changes[J],2013,110(41).
APA	Alvarez-Solas J.,Robinson A.,Montoya M.,&Ritz C..(2013).Iceberg discharges of the last glacial period driven by oceanic circulation changes.Proceedings of the National Academy of Sciences of the United States of America,110(41).
MLA	Alvarez-Solas J.,et al."Iceberg discharges of the last glacial period driven by oceanic circulation changes".Proceedings of the National Academy of Sciences of the United States of America 110.41(2013).