| Thermocline dynamics in the northwestern tropical Pacific over the past 700 kyr | |
Jia, Qi1 ; Li, Tiegang1,2; Xiong, Zhifang1,2; Steinke, Stephan3,4; Algeo, Thomas J.5,6,7; Jiang, Fuqing2,8; Chang, Fengming2,8; Qin, Bingbin1
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| 2020-09-15 | |
| 发表期刊 | QUATERNARY SCIENCE REVIEWS
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| ISSN | 0277-3791 |
| 卷号 | 244页码:16 |
| 通讯作者 | Li, Tiegang([email protected]) |
| 摘要 | Variations in thermoclinal conditions play an important role in the evolution of the Western Pacific Warm Pool (WPWP) and in connecting the tropical and extratropical regions of the Pacific Ocean. However, secular thermoclinal changes in the northwestern part of the WPWP and their forcing mechanisms are not yet well understood, particularly on orbital timescales. In this study, we report thermoclinal variation at Site MD06-3047 B in the western Philippine Sea over the last 700 kyr. Our data show that variations in thermocline temperature and salinity in the study area were correlated with changes in Earth's obliquity, with warmer and saltier (colder and fresher) thermocline waters corresponding to high (low) Earth-axial obliquity. At high obliquity, increases in thermocline temperature and salinity may have been linked to advection of warm North Pacific tropical water. In the study area, a lower (higher) vertical temperature gradient in the upper water column suggests a deeper (shallower) thermocline during glacials (interglacials). The main factor leading to thermoclinal deepening during glacials was strengthening of the East Asian winter monsoon (EAWM), and more La Nina-like conditions may have contributed to concurrent subsurface warming and thus thermoclinal deepening. In-phase thermoclinal deepening in the northern and peri-equatorial southern WPWP during glacial stages may have been triggered by changes in glacial boundary conditions, such as increased ice sheet thickness, through intensification of the EAWM and strengthening of the tropical Trade Winds. (C) 2020 Elsevier Ltd. All rights reserved. |
| 关键词 | Western philippine sea Western pacific warm pool WPWP delta O-18 Obliquity Thermocline depth |
| DOI | 10.1016/j.quascirev.2020.106465 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[41830539]; National Natural Science Foundation of China[41906063]; National Natural Science Foundation of China[91858106]; National Natural Science Foundation of China[41806084]; National Natural Science Foundation of China[U1606401]; Basic Scientific Fund for National Public Research Institutes of China[2019S04]; Basic Scientific Fund for National Public Research Institutes of China[2017Y07]; Taishan Scholars Project Funding[ts20190963]; Open Fund of Qingdao National Laboratory for Marine Science and Technology[QNLM2016ORP0205]; National Programme on Global Change and Air-Sea Interaction[GASIGEOGE-03]; National Programme on Global Change and Air-Sea Interaction[GASI-GEOGE-04]; Evaluation and Effect of Paleoclimatic Evolution[GASI-04-QYQH-04]; China Postdoctoral Science Foundation[2019M662473]; China Ocean Mineral Resources Research and Development Association Program[DY135-E2-1-01] |
| WOS研究方向 | Physical Geography ; Geology |
| WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
| WOS记录号 | WOS:000566884300002 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/168738 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Li, Tiegang |
| 作者单位 | 1.Minist Nat Resources, Inst Oceanog 1, Qingdao 266061, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 3.Xiamen Univ, Dept Geol Oceanog, Xiamen 361102, Peoples R China 4.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361102, Peoples R China 5.Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA 6.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China 7.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 8.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Qi,Li, Tiegang,Xiong, Zhifang,et al. Thermocline dynamics in the northwestern tropical Pacific over the past 700 kyr[J]. QUATERNARY SCIENCE REVIEWS,2020,244:16. |
| APA | Jia, Qi.,Li, Tiegang.,Xiong, Zhifang.,Steinke, Stephan.,Algeo, Thomas J..,...&Qin, Bingbin.(2020).Thermocline dynamics in the northwestern tropical Pacific over the past 700 kyr.QUATERNARY SCIENCE REVIEWS,244,16. |
| MLA | Jia, Qi,et al."Thermocline dynamics in the northwestern tropical Pacific over the past 700 kyr".QUATERNARY SCIENCE REVIEWS 244(2020):16. |
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