气候变化领域集成服务门户(CCPortal): Wind-Driven Evolution of the North Pacific Subpolar Gyre Over the Last Deglaciation

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DOI	10.1029/2019GL086328
	Wind-Driven Evolution of the North Pacific Subpolar Gyre Over the Last Deglaciation
	Gray W.R.; Wills R.C.J.; Rae J.W.B.; Burke A.; Ivanovic R.F.; Roberts W.H.G.; Ferreira D.; Valdes P.J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:6
英文摘要	North Pacific atmospheric and oceanic circulations are key missing pieces in our understanding of the reorganization of the global climate system since the Last Glacial Maximum. Here, using a basin-wide compilation of planktic foraminiferal δ18O, we show that the North Pacific subpolar gyre extended ~3° further south during the Last Glacial Maximum, consistent with sea surface temperature and productivity proxy data. Climate models indicate that the expansion of the subpolar gyre was associated with a substantial gyre strengthening, and that these gyre circulation changes were driven by a southward shift of the midlatitude westerlies and increased wind stress from the polar easterlies. Using single-forcing model runs, we show that these atmospheric circulation changes are a nonlinear response to ice sheet topography/albedo and CO2. Our reconstruction indicates that the gyre boundary (and thus westerly winds) began to migrate northward at ~16.5 ka, driving changes in ocean heat transport, biogeochemistry, and North American hydroclimate. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Glacial geology; Oceanography; Surface waters; Topography; Deglaciations; Gyre circulation; North Pacific; Oxygen isotopes; westerlies; Climate models; albedo; atmosphere-ocean coupling; atmospheric circulation; climate forcing; climate modeling; gyre; ice sheet; last deglaciation; Last Glacial Maximum; oxygen isotope; proxy climate record; sea surface temperature; topography; westerly; Pacific Ocean; Pacific Ocean (North)
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/170550
作者单位	Laboratoire des Sciences du Climat et de l'Environnement (LSCE/IPSL), Université Paris-Saclay, Gif-sur-Yvette, France; School of Earth and Environmental Science, University of St Andrews, Saint Andrews, United Kingdom; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Geography and Environmental Sciences, Northumbria University, Newcastle, United Kingdom; Department of Meteorology, University of Reading, Reading, United Kingdom; School of Geographical Sciences, University of Bristol, Bristol, United Kingdom
推荐引用方式 GB/T 7714	Gray W.R.,Wills R.C.J.,Rae J.W.B.,et al. Wind-Driven Evolution of the North Pacific Subpolar Gyre Over the Last Deglaciation[J],2020,47(6).
APA	Gray W.R..,Wills R.C.J..,Rae J.W.B..,Burke A..,Ivanovic R.F..,...&Valdes P.J..(2020).Wind-Driven Evolution of the North Pacific Subpolar Gyre Over the Last Deglaciation.Geophysical Research Letters,47(6).
MLA	Gray W.R.,et al."Wind-Driven Evolution of the North Pacific Subpolar Gyre Over the Last Deglaciation".Geophysical Research Letters 47.6(2020).