Combined high- and low-latitude forcing of East Asian monsoon precipitation variability in the Pliocene warm period

被引：63

作者：

Wang, Yichao ^{[1
]}

Lu, Huayu ^{[1
]}

Wang, Kexin ^{[1
]}

Wang, Yao ^{[1
]}

Li, Yongxiang ^{[2
]}

Clemens, Steven ^{[3
]}

Lv, Hengzhi ^{[1
]}

Huang, Zihan ^{[1
]}

Wang, Hanlin ^{[1
]}

Hu, Xuzhi ^{[2
]}

Lu, Fuzhi ^{[1
]}

Zhang, Hanzhi ^{[1
]}

机构：

[1] Nanjing Univ, Sch Geog & Ocean Sci, Nanjing 210023, Peoples R China

[2] Nanjing Univ, Sch Earth Sci & Engn, Nanjing 210023, Peoples R China

[3] Brown Univ, Earth Environm & Planetary Sci, Providence, RI 02912 USA

来源：

SCIENCE ADVANCES | 2020年 / 6卷 / 46期

基金：

中国国家自然科学基金;

关键词：

LOESS PLATEAU; CENTRAL CHINA; GREENHOUSE; GLACIATION; DEPOSITS; CYCLE; SEDIMENTATION; SEQUENCE; MARINE; DRIVEN;

D O I：

10.1126/sciadv.abc2414

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

070301 [无机化学]; 070403 [天体物理学]; 070507 [自然资源与国土空间规划学]; 090105 [作物生产系统与生态工程];

摘要：

East Asian monsoon variability in the Pliocene warm world has not been sufficiently studied because of the lack of direct records. We present a high-resolution precipitation record from Pliocene fluvial-lacustrine sequences in the Weihe Basin, Central China, a region sensitive to the East Asian monsoon. The record shows an abrupt monsoon shift at similar to 4.2 million years ago, interpreted as the result of high-latitude cooling, with an extratropical temperature decrease across a critical threshold. The precipitation time series exhibits a pronounced similar to 100-thousand year periodicity and the presence of precession and half-precession cycles, which suggest low-latitude forcing. The synchronous phase but mismatched amplitudes of the East Asian monsoon precipitation proxy and eccentricity suggest a nonlinear but sensitive precipitation response to temperature forcing in the Pliocene warm world. These observations highlight the role of high- and low-latitude forcing of East Asian monsoon variations on tectonic and orbital time scales.

引用

页数：9

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