Changes of deep Pacific overturning circulation and carbonate chemistry during middle Miocene East Antarctic ice sheet expansion
文献类型：期刊论文
| 作者 | Li, Ke3; Yu, Jimin1,3; Ma, Wentao3,4; Tian, Jun3; Ma, Xiaolin2,3 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2018-02-15 |
| 卷号 | 484期号:2018页码:253-263 |
| 关键词 | Deep Pacific Ocean Circulation Middle Miocene Carbonate Chemistry East Antarctic Ice Sheet Expansion |
| DOI | 10.1016/j.epsl.2017.12.002 |
| 文献子类 | Article |
| 英文摘要 | East Antarctic ice sheet expansion (EAIE) at similar to 13.9 Ma in the middle Miocene represents a major climatic event during the long-term Cenozoic cooling, but ocean circulation and carbon cycle changes during this event remain unclear. Here, we present new fish teeth isotope (epsilon Nd) and benthic foraminiferal B/Ca records from the South China Sea (SCS), newly integrated meridional Pacific benthic foraminiferal delta O-18 and delta C-13 records and simulated results from a biogeochemical box model to explore the responses of deep Pacific Ocean circulation and carbon cycle across EAIE. The epsilon Nd and meridional benthic delta C-13 records reveal a more isolated Pacific Deep Water (PDW) and a sluggish Pacific meridional overturning circulation during the post-EAIE with respect to the pre-EAIE owing to weakened southern-sourced deep water formation. The deep-water [CO32-] and calcium carbonate mass accumulation rate in the SCS display markedly similar increases followed by recoveries to the pre-EAIE level during EAIE, which were probably caused by a shelf-basin shift of CaCO3 deposition and strengthened weathering due to a sea level fall within EAIE. The model results show that the similar to 1 parts per thousand positive delta C-13 excursion during EAIE could be attributed to increased weathering of high-delta C-13 shelf carbonates and a terrestrial carbon reservoir expansion. The drawdown of atmospheric CO2 over the middle Miocene were probably caused by combined effects of increased shelf carbonate weathering, expanded land biosphere carbon storage and a sluggish deep Pacific meridional overturning circulation. (C) 2017 Elsevier B.V. All rights reserved. |
| WOS关键词 | SOUTH CHINA SEA ; OCEAN CIRCULATION ; ATMOSPHERIC CO2 ; PALEOCEANOGRAPHIC EVOLUTION ; ISOTOPE STRATIGRAPHY ; TECTONIC EVOLUTION ; CLIMATE TRANSITION ; RECONSTRUCTIONS ; PRESERVATION ; GLACIATION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000424726000022 |
| 源URL | [http://ir.ieecas.cn/handle/361006/5190]  |
| 专题 | 地球环境研究所_黄土与第四纪地质国家重点实验室（2010~） |
| 作者单位 | 1.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2601, Australia 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, Peoples R China 3.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China 4.SOA, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Zhejiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Ke,Yu, Jimin,Ma, Wentao,et al. Changes of deep Pacific overturning circulation and carbonate chemistry during middle Miocene East Antarctic ice sheet expansion[J]. EARTH AND PLANETARY SCIENCE LETTERS,2018,484(2018):253-263. |
| APA | Li, Ke,Yu, Jimin,Ma, Wentao,Tian, Jun,&Ma, Xiaolin.(2018).Changes of deep Pacific overturning circulation and carbonate chemistry during middle Miocene East Antarctic ice sheet expansion.EARTH AND PLANETARY SCIENCE LETTERS,484(2018),253-263. |
| MLA | Li, Ke,et al."Changes of deep Pacific overturning circulation and carbonate chemistry during middle Miocene East Antarctic ice sheet expansion".EARTH AND PLANETARY SCIENCE LETTERS 484.2018(2018):253-263. |
入库方式： OAI收割
来源：地球环境研究所
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