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Development of the Leeuwin Current on the northwest shelf of Australia through the Pliocene-Pleistocene period
He, Yuxin1; Wang, Huanye2; Liu, Zhonghui3
通讯作者He, Yuxin(yxhe@zju.edu.cn)
2021-04-01
发表期刊EARTH AND PLANETARY SCIENCE LETTERS
ISSN0012-821X
卷号559页码:9
摘要Although the Leeuwin Current (LC) is thought to play a pivotal role in climatic and oceanic systems of the western Australian region, how the LC developed through the Pliocene-Pleistocene period remains elusive. Here we used biomarker records to reconstruct variations of temperatures and primary productivity on the northwest shelf of Australia over the last 6 million years. Since similar to 1.2 million years ago (Ma), our sea surface temperature record indicates progressive warming, with temperature values comparable to those in the Indo-Pacific Warm Pool, in contrast with the long-term global cooling trend. The regional surface warming was accompanied by suppressed primary productivity, together indicating prevailing warm, low-salinity, nutrient-deficient surface water, and thus a stronger LC since the Mid-Pleistocene Transition. During 4-1.2 Ma, greater surface temperature gradient between the Indo-Pacific Warm Pool and the northwest shelf of Australia and higher primary productivity seem to suggest a generally weaker LC. Warmer temperatures and lower productivity suggest a plausible existence of the LC during 6-4 Ma, but more work is required to confirm this. Impact of sea level and the Indonesian Throughflow on the LC strength may exist, but did not dominate through the Pliocene-Pleistocene period, considering different variation patterns among them. We propose the stronger LC after similar to 1.2 Ma was more likely triggered by enhanced atmospheric circulation. Although the increased LC after similar to 1.2 Ma may have potentially brought additional moisture to the Australian continent during the interglacial periods, it has not overturned the long-term drying trend through the Pliocene-Pleistocene period. (C) 2021 Elsevier B.V. All rights reserved.
关键词Leeuwin Current Indonesian Throughflow northwest shelf of Australia Pliocene-Pleistocene temperatures primary productivity
DOI10.1016/j.epsl.2021.116767
关键词[WOS]INDONESIAN THROUGHFLOW ; TETRAETHER LIPIDS ; CLIMATE ; PACIFIC ; CALIBRATION ; VEGETATION ; U-37(K') ; PROXIES ; INDEX
收录类别SCI ; SCI
语种英语
资助项目National Natural Science Foundation of China[41877332] ; National Natural Science Foundation of China[42073071] ; Young Elite Scientists Sponsorship Program by CAST[2018QNRC001]
WOS研究方向Geochemistry & Geophysics
项目资助者National Natural Science Foundation of China ; Young Elite Scientists Sponsorship Program by CAST
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000620269600006
出版者ELSEVIER
引用统计
被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/15953
专题加速器质谱中心
通讯作者He, Yuxin
作者单位1.Zhejiang Univ, Sch Earth Sci, Key Lab Geosci Big Data & Deep Resource Zhejiang, Hangzhou 310027, Peoples R China
2.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710061, Shaanxi, Peoples R China
3.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China
推荐引用方式
GB/T 7714
He, Yuxin,Wang, Huanye,Liu, Zhonghui. Development of the Leeuwin Current on the northwest shelf of Australia through the Pliocene-Pleistocene period[J]. EARTH AND PLANETARY SCIENCE LETTERS,2021,559:9.
APA He, Yuxin,Wang, Huanye,&Liu, Zhonghui.(2021).Development of the Leeuwin Current on the northwest shelf of Australia through the Pliocene-Pleistocene period.EARTH AND PLANETARY SCIENCE LETTERS,559,9.
MLA He, Yuxin,et al."Development of the Leeuwin Current on the northwest shelf of Australia through the Pliocene-Pleistocene period".EARTH AND PLANETARY SCIENCE LETTERS 559(2021):9.
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