气候变化领域集成服务门户(CCPortal): Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years

CCPortal

DOI	10.1038/s41467-021-24264-9
	Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years
	Wu S.; Lembke-Jene L.; Lamy F.; Arz H.W.; Nowaczyk N.; Xiao W.; Zhang X.; Hass H.C.; Titschack J.; Zheng X.; Liu J.; Dumm L.; Diekmann B.; Nürnberg D.; Tiedemann R.; Kuhn G.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	The Antarctic Circumpolar Current (ACC) plays a crucial role in global ocean circulation by fostering deep-water upwelling and formation of new water masses. On geological time-scales, ACC variations are poorly constrained beyond the last glacial. Here, we reconstruct changes in ACC strength in the central Drake Passage in vicinity of the modern Polar Front over a complete glacial-interglacial cycle (i.e., the past 140,000 years), based on sediment grain-size and geochemical characteristics. We found significant glacial-interglacial changes of ACC flow speed, with weakened current strength during glacials and a stronger circulation in interglacials. Superimposed on these orbital-scale changes are high-amplitude millennial-scale fluctuations, with ACC strength maxima correlating with diatom-based Antarctic winter sea-ice minima, particularly during full glacial conditions. We infer that the ACC is closely linked to Southern Hemisphere millennial-scale climate oscillations, amplified through Antarctic sea ice extent changes. These strong ACC variations modulated Pacific-Atlantic water exchange via the “cold water route” and potentially affected the Atlantic Meridional Overturning Circulation and marine carbon storage. © 2021, The Author(s).
语种	英语
scopus关键词	Antarctic Circumpolar Wave; circumpolar current; climate oscillation; diatom; geochemistry; glacial-interglacial cycle; global ocean; grain size; Last Glacial; oceanic circulation; polar front; sea ice; Southern Hemisphere; upwelling; water exchange; water mass; antarctic circumpolar current; Antarctica; Article; Atlantic meridional overturning circulation; carbon storage; climate; diatom; flow rate; geochemical analysis; glacial period; oscillation; particle size; sea ice; sediment; Southern Hemisphere; strength; winter; Antarctic Circumpolar Current; Drake Passage; Southern Ocean; Bacillariophyta
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251407
作者单位	Alfred-Wegener-Institut Helmholtz-Zentrum für Meeres- und Polarforschung, Bremerhaven, 27568, Germany; Leibniz Institute for Baltic Sea Research, Warnemünde, Rostock 18119, Germany; Helmoltz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, 14473, Germany; State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China; Key Laboratory of Western China’s Environmental Systems, (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; Alfred-Wegener-Institut Helmholtz-Zentrum für Meeres- und Polarforschung, Sylt, 25980, Germany; MARUM–Center for Marine Environmental Sciences, University of Bremen, Bremen, 28359, Germany; Senckenberg am Meer, Marine Research Department, Wilhelmshaven, 26382, Germany; State Key Laboratory of Marine Resour...
推荐引用方式 GB/T 7714	Wu S.,Lembke-Jene L.,Lamy F.,et al. Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years[J],2021,12(1).
APA	Wu S..,Lembke-Jene L..,Lamy F..,Arz H.W..,Nowaczyk N..,...&Kuhn G..(2021).Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years.Nature Communications,12(1).
MLA	Wu S.,et al."Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years".Nature Communications 12.1(2021).