气候变化领域集成服务门户(CCPortal): Influence of the North Atlantic subpolar gyre circulation on the 4.2 ka BP event

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DOI	10.5194/cp-15-701-2019
	Influence of the North Atlantic subpolar gyre circulation on the 4.2 ka BP event
	Jalali B.; Sicre M.-A.; Azuara J.; Pellichero V.; Combourieu-Nebout N.
发表日期	2019
ISSN	18149324
起始页码	701
结束页码	711
卷号	15 期号:2
英文摘要	The 4.2 ka BP event, spanning from ca 4200 to 3900 cal BP, has been documented in numerous archaeological data and continental archives across the Northern Hemisphere as an abrupt shift to dry and cold climate. However, data on synchronous ocean circulation changes are notably lacking, thus preventing us from getting a full insight into the physical mechanisms responsible for this climate deterioration. Here, we present two high-resolution (5-20 years) sea surface temperature (SST) records from the subpolar gyre and off north Iceland in the vicinity of the polar front obtained from alkenone paleo-thermometry and compare them with proxy data from the western Mediterranean Sea to gain information on regional temperature and precipitation patterns. Our results are evidence of a temperature dipole pattern which, combined with other paleo-oceanographic records of the North Atlantic, suggests a weakening of the subpolar gyre possibly associated with atmospheric blocked regimes. © Author(s) 2019.
语种	英语
scopus关键词	alkenone; gyre; Northern Hemisphere; paleoceanography; polar front; precipitation (climatology); sea surface temperature; thermometry; Atlantic Ocean; Atlantic Ocean (North); Iceland; Mediterranean Sea; Mediterranean Sea (West)
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146829
作者单位	LOCEAN Laboratory, Sorbonne Universités (UPMC, Univ Paris 06), CNRS-IRD-MNHN, Paris, France; Histoire Naturelle de l'Homme Préhistorique (UMR 7194 CNRS), Département Homme et Environnement, Muséum National d'Histoire Naturelle, Institut de Paléontologie Humaine, Paris, France
推荐引用方式 GB/T 7714	Jalali B.,Sicre M.-A.,Azuara J.,et al. Influence of the North Atlantic subpolar gyre circulation on the 4.2 ka BP event[J],2019,15(2).
APA	Jalali B.,Sicre M.-A.,Azuara J.,Pellichero V.,&Combourieu-Nebout N..(2019).Influence of the North Atlantic subpolar gyre circulation on the 4.2 ka BP event.Climate of the Past,15(2).
MLA	Jalali B.,et al."Influence of the North Atlantic subpolar gyre circulation on the 4.2 ka BP event".Climate of the Past 15.2(2019).