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Co-evolution of monsoonal precipitation in East Asia and the tropical Pacific ENSO system since 2.36 Ma: New insights from high-resolution clay mineral records in the West Philippine Sea
Yu, Zhaojie1,2; Wan, Shiming1,3; Colin, Christophe2; Yan, Hong4; Bonneau, Lucile2; Liu, Zhifei5; Song, Lina6; Sun, Hanjie1; Xu, Zhaokai1; Jiang, Xuejun7; Li, Anchun1; Li, Tiegang1
2016-07-15
发表期刊EARTH AND PLANETARY SCIENCE LETTERS
卷号446页码:45-55
文章类型Article
摘要Clay mineralogical analysis and scanning electron microscope (SEM) analysis were performed on deepsea sediments cored on the Benham Rise (core MD06-3050) in order to reconstruct long-term evolution of East Asian Summer Monsoon (EASM) rainfall in the period since 2.36 Ma. Clay mineralogical variations are due to changes in the ratios of smectite, which derive from weathering of volcanic rocks in Luzon Island during intervals of intensive monsoon rainfall, and illite-and chlorite-rich dusts, which are transported from East Asia by winds associated with the East Asian Winter Monsoon (EAWM). Since Luzon is the main source of smectite to the Benham Rise, long-term consistent variations in the smectite/(illite + chlorite) ratio in core MD06-3050 as well as ODP site 1146 in the Northern South China Sea suggest that minor contributions of eolian dust played a role in the variability of this mineralogical ratio and indicate strengthening EASM precipitation in SE Asia during time intervals from 2360 to 1900 kyr, 1200 to 600 kyr, and after 200 kyr. The EASM rainfall record displays a 30 kyr periodicity suggesting the influence of El Nifio Southern Oscillation (ENSO). These intervals of rainfall intensification on Luzon Island are coeval with a reduction in precipitation over central China and an increase in zonal SST gradient in the equatorial Pacific Ocean, implying a reinforcement of La Nina-like conditions. In contrast, periods of reduced rainfall on Luzon Island are associated with higher precipitation in central China and a weakening zonal SST gradient in the equatorial Pacific Ocean, thereby suggesting the development of dominant El Nino-like conditions. Our study, therefore, highlights for the first time a long-term temporal and spatial co-evolution of monsoonal precipitation in East Asia and of the tropical Pacific ENSO system over the past 2.36 Ma. (C) 2016 Elsevier B.V. All rights reserved.
关键词East Asian Monsoon Precipitation Enso Clay Minerals West Philippine Sea Eolian Input
DOI10.1016/j.epsl.2016.04.022
收录类别SCI
语种英语
WOS记录号WOS:000377836200006
引用统计
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/130991
专题海洋地质与环境重点实验室
海洋环流与波动重点实验室
作者单位1.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China
2.Univ Paris Saclay, Lab GEOsci Paris Sud GEOPS, Univ Paris 11, CNRS,UMR 8148, Batiment 504, F-91405 Orsay, France
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
4.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710061, Peoples R China
5.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
6.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao 266071, Peoples R China
7.China Geol Survey, Qingdao Inst Marine Geol, Qingdao 266071, Peoples R China
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Yu, Zhaojie,Wan, Shiming,Colin, Christophe,et al. Co-evolution of monsoonal precipitation in East Asia and the tropical Pacific ENSO system since 2.36 Ma: New insights from high-resolution clay mineral records in the West Philippine Sea[J]. EARTH AND PLANETARY SCIENCE LETTERS,2016,446:45-55.
APA Yu, Zhaojie.,Wan, Shiming.,Colin, Christophe.,Yan, Hong.,Bonneau, Lucile.,...&Li, Tiegang.(2016).Co-evolution of monsoonal precipitation in East Asia and the tropical Pacific ENSO system since 2.36 Ma: New insights from high-resolution clay mineral records in the West Philippine Sea.EARTH AND PLANETARY SCIENCE LETTERS,446,45-55.
MLA Yu, Zhaojie,et al."Co-evolution of monsoonal precipitation in East Asia and the tropical Pacific ENSO system since 2.36 Ma: New insights from high-resolution clay mineral records in the West Philippine Sea".EARTH AND PLANETARY SCIENCE LETTERS 446(2016):45-55.
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