globalchange  > 影响、适应和脆弱性
DOI: 10.5194/cp-14-1361-2018
Scopus记录号: 2-s2.0-85054330529
论文题名:
Last interglacial ocean changes in the Bahamas: Climate teleconnections between low and high latitudes
作者: Zhuravleva A.; Bauch H.A.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2018
卷: 14, 期:10
起始页码: 1361
结束页码: 1375
语种: 英语
英文摘要: Paleorecords and modeling studies suggest that instabilities in the Atlantic Meridional Overturning Circulation (AMOC) strongly affect the low-latitude climate, namely via feedbacks on the Atlantic Intertropical Convergence Zone (ITCZ). Despite the pronounced millennial-scale overturning and climatic variability documented in the subpolar North Atlantic during the last interglacial period (MIS 5e), studies on cross-latitudinal teleconnections remain very limited. This precludes a full understanding of the mechanisms controlling subtropical climate evolution across the last warm cycle. Here, we present new planktic foraminiferal assemblage data combined withi>18O values in surface and thermocline-dwelling foraminifera from the Bahamas, a region ideally suited to studying past changes in the subtropical ocean and atmosphere. Our data reveal that the peak sea surface warmth during early MIS 5e was intersected by an abrupt millennial-scale cooling/salinification event, which was possibly associated with a sudden southward displacement of the mean annual ITCZ position. This atmospheric shift is, in turn, ascribed to the transitional climatic regime of early MIS 5e, which was characterized by persistent ocean freshening in the high latitudes and an unstable AMOC mode. © 2018 Copernicus GmbH. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109527
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Academy of Sciences, Humanities and Literature, Mainz C/o GEOMAR Helmholtz Centre for Ocean Research, Wischhofstrasse 1-3, Kiel, 24148, Germany; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research C/o GEOMAR Helmholtz Centre for Ocean Research, Wischhofstrasse 1-3, Kiel, 24148, Germany

Recommended Citation:
Zhuravleva A.,Bauch H.A.. Last interglacial ocean changes in the Bahamas: Climate teleconnections between low and high latitudes[J]. Climate of the Past,2018-01-01,14(10)
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