Deepwater circulation variation in the South China Sea since the Last Glacial Maximum

Deepwater circulation plays a central role in global climate. Compared with the Atlantic, the Pacific deepwater circulation's history remains unclear. The Luzon overflow, a branch of the North Pacific deep water, determines the ventilation rate of the South China Sea (SCS) basin. Sedimentary ma...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Zheng, Xufeng, Kao, ShuhJi, Chen, Zhong, Menviel, Laurie, Chen, Han, Du, Yan, Wan, Shiming, Yan, Hong, Liu, Zhonghui, Zheng, Liwei, Wang, Shuhong, Li, Dawei, Zhang, Xu
Format: Article in Journal/Newspaper
Language:English
Published: 2016
Subjects:
South China Sea
Deep Current
Anisotropy Of Magnetic Susceptibility
Heinrich 1
Atlantic-pacific Seesaw
Science & Technology
Physical Sciences
MERIDIONAL OVERTURNING CIRCULATION
NORTH PACIFIC
BOTTOM-WATER
MAGNETIC-SUSCEPTIBILITY
OCEAN CIRCULATION
DEGLACIATION
CLIMATE
SEDIMENTS
ANISOTROPY
Geology
Geosciences
Multidisciplinary
Pacific
North Atlantic Deep Water
North Atlantic
Online Access:http://ir.ieecas.cn/handle/361006/5649
https://doi.org/10.1002/2016GL070342
Description
Summary:Deepwater circulation plays a central role in global climate. Compared with the Atlantic, the Pacific deepwater circulation's history remains unclear. The Luzon overflow, a branch of the North Pacific deep water, determines the ventilation rate of the South China Sea (SCS) basin. Sedimentary magnetic properties in the SCS reflect millennial-scale fluctuations in deep current intensity and orientation. The data suggest a slightly stronger current at the Last Glacial Maximum compared to the Holocene. But, the most striking increase in deep current occurred during Heinrich stadial 1 (H1) and to a lesser extent during the Younger Dryas (YD). Results of a transient deglacial experiment suggest that the northeastern current strengthening at the entrance of the SCS during H1 and the YD, times of weak North Atlantic Deep Water formation, could be linked to enhanced formation of North Pacific Deep Water.

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