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DOI | 10.1073/pnas.1915510117 |
Half-precessional cycle of thermocline temperature in the western equatorial Pacific and its bihemispheric dynamics | |
Jian, Zhimin1; Wang, Yue1; Dang, Haowen1; Lea, David W.2; Liu, Zhengyu3; Jin, Haiyan1; Yin, Yaqian1 | |
2020-03-31 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:13页码:7044-7051 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | The El Nino-Southern Oscillation (ENSO), which is tightly coupled to the equatorial thermocline in the Pacific, is the dominant source of interannual climate variability, but its long-term evolution in response to climate change remains highly uncertain. This study uses Mg/Ca in planktonic foraminiferal shells to reconstruct sea surface and thermoclinewater temperatures (SST and TWT) for the past 142 ky in a western equatorial Pacific (WEP) core MD01-2386. Unlike the dominant 100-ky glacial-interglacial cycle recorded by SST and delta O-18, which echoes the pattern seen in other WEP sites, the upper ocean thermal gradient shows a clear half-precessional (9.4 ky or 12.7 ky) cycle as indicated by the reconstructed and simulated temperature (Delta T) and delta O-18 differences between the surface and thermocline waters. This phenomenon is attributed to the interplay of subtropical-to-tropical thermocline anomalies forced by the antiphased meridional insolation gradients in the two hemispheres at the precessional band. In particular, the TWT shows greater variability than SST, and dominates the Delta T changes which couple with the west-east SST difference in the equatorial Pacific at the half-precessional band, implying a decisive role of the tropical thermocline in orbital-scale climate change. |
英文关键词 | thermocline temperature half-precession western equatorial Pacific meridional gradient |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000523188100020 |
WOS关键词 | EL-NINO ; WARM POOL ; CLIMATE VARIABILITY ; PLANKTIC FORAMINIFERA ; FORCING MECHANISMS ; WAVE INTERACTION ; INDO-PACIFIC ; KELVIN WAVE ; SURFACE ; MG/CA |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249569 |
专题 | 地球科学 |
作者单位 | 1.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China; 2.Univ Calif Santa Barbara, Dept Earth Sci, Santa Barbara, CA 93106 USA; 3.Ohio State Univ, Dept Geog, Columbus, OH 43210 USA |
推荐引用方式 GB/T 7714 | Jian, Zhimin,Wang, Yue,Dang, Haowen,et al. Half-precessional cycle of thermocline temperature in the western equatorial Pacific and its bihemispheric dynamics[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(13):7044-7051. |
APA | Jian, Zhimin.,Wang, Yue.,Dang, Haowen.,Lea, David W..,Liu, Zhengyu.,...&Yin, Yaqian.(2020).Half-precessional cycle of thermocline temperature in the western equatorial Pacific and its bihemispheric dynamics.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(13),7044-7051. |
MLA | Jian, Zhimin,et al."Half-precessional cycle of thermocline temperature in the western equatorial Pacific and its bihemispheric dynamics".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.13(2020):7044-7051. |
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