Development of the Leeuwin Current on the northwest shelf of Australia through the Pliocene-Pleistocene period
文献类型：期刊论文
| 作者 | He, Yuxin1; Wang, Huanye2; Liu, Zhonghui3 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2021-04-01 |
| 卷号 | 559页码:9 |
| 关键词 | Leeuwin Current Indonesian Throughflow northwest shelf of Australia Pliocene-Pleistocene temperatures primary productivity |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2021.116767 |
| 通讯作者 | He, Yuxin(yxhe@zju.edu.cn) |
| 英文摘要 | 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. |
| WOS关键词 | INDONESIAN THROUGHFLOW ; TETRAETHER LIPIDS ; CLIMATE ; PACIFIC ; CALIBRATION ; VEGETATION ; U-37(K') ; PROXIES ; INDEX |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000620269600006 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; Young Elite Scientists Sponsorship Program by CAST |
| 源URL | [http://ir.ieecas.cn/handle/361006/15952]  |
| 专题 | 地球环境研究所_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. |
入库方式： OAI收割
来源：地球环境研究所
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