气候变化领域集成服务门户(CCPortal): Out of the Ice Age: Megatides of the Arctic Ocean and the Bølling-Ållerød; Younger Dryas Transition

CCPortal

DOI	10.1029/2020GL089870
	Out of the Ice Age: Megatides of the Arctic Ocean and the Bølling-Ållerød; Younger Dryas Transition
	Velay-Vitow J.; Richard Peltier W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	The most recent deglaciation of the Northern Hemisphere ice sheets began slowly subsequent to the Last Glacial Maximum (LGM) but was soon thereafter marked by a series of extremely rapid climate events, namely, Heinrich Event 1 (H1), the Bølling-Ållerød (B-A), and the Younger Dryas (YD). We show that a tidally forced marine ice stream instability mechanism, recently implicated as responsible for H1, may also have created the conditions required for the occurrence of the YD. Strong buoyancy forcing acting at the point of entry of the Amundsen Gulf Ice Stream (AGIS) into the Arctic Ocean would have destabilized the ice stream leading to its elimination. This buoyancy forcing was initially provided by the intense polar warming associated with the B-A acting in conjunction with the moderately high-amplitude tides that had existed since LGM. This initial destabilization led to a highly significant amplification of the tidal egime and thus AGIS destruction. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Buoyancy; Glacial geology; Buoyancy forcing; Climate event; Deglaciations; Heinrich Events; High amplitudes; Last Glacial Maximum; Northern Hemispheres; Point of entries; Ice; amplification; buoyancy forcing; deglaciation; Heinrich event; ice stream; Last Glacial Maximum; Northern Hemisphere; warming; Younger Dryas; Amundsen Gulf; Arctic Ocean; Arctic Ocean; Beaufort Sea
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169368
作者单位	Department of Physics, University of Toronto, Toronto, ON, Canada
推荐引用方式 GB/T 7714	Velay-Vitow J.,Richard Peltier W.. Out of the Ice Age: Megatides of the Arctic Ocean and the Bølling-Ållerød; Younger Dryas Transition[J],2020,47(23).
APA	Velay-Vitow J.,&Richard Peltier W..(2020).Out of the Ice Age: Megatides of the Arctic Ocean and the Bølling-Ållerød; Younger Dryas Transition.Geophysical Research Letters,47(23).
MLA	Velay-Vitow J.,et al."Out of the Ice Age: Megatides of the Arctic Ocean and the Bølling-Ållerød; Younger Dryas Transition".Geophysical Research Letters 47.23(2020).