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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, Shuzhuang; Lembke-Jene, Lester; Lamy, Frank; Arz, Helge W.; Nowaczyk, Norbert; Xiao, Wenshen; Zhang, Xu; Hass, H. Christian; Titschack, Juergen; Zheng, Xufeng; Liu, Jiabo; Dumm, Levin; Diekmann, Bernhard; Nuernberg, Dirk; Tiedemann, Ralf; Kuhn, Gerhard | |
通讯作者 | Wu, SZ (通讯作者) |
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. How the Antarctic Circumpolar Current (ACC) changed on glacial-interglacial time scales is not well known. Here, the authors present a 140,000 year long sediment record from the Drake passage and show both glacial-interglacial as well as millennial-scale variability which are linked to Atlantic variability and marine carbon storage. |
关键词 | MERIDIONAL OVERTURNING CIRCULATIONLAST GLACIAL MAXIMUMWESTERLY WIND CHANGESNORTH-ATLANTIC OCEANSOUTHERN-OCEANSEA-ICECLIMATE VARIABILITYTERRIGENOUS SEDIMENTTRANSPORTWATER |
语种 | 英语 |
WOS研究方向 | Science & Technology - Other Topics |
WOS类目 | Multidisciplinary Sciences |
WOS记录号 | WOS:000669490300003 |
来源期刊 | NATURE COMMUNICATIONS |
来源机构 | 中国科学院青藏高原研究所 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/260540 |
推荐引用方式 GB/T 7714 | Wu, Shuzhuang,Lembke-Jene, Lester,Lamy, Frank,et al. Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years[J]. 中国科学院青藏高原研究所,2021,12(1). |
APA | Wu, Shuzhuang.,Lembke-Jene, Lester.,Lamy, Frank.,Arz, Helge W..,Nowaczyk, Norbert.,...&Kuhn, Gerhard.(2021).Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years.NATURE COMMUNICATIONS,12(1). |
MLA | Wu, Shuzhuang,et al."Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years".NATURE COMMUNICATIONS 12.1(2021). |
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