East Asian Monsoonal Climate Sensitivity Changed in the Late Pliocene in Response to Northern Hemisphere Glaciations

被引：12
|
作者：
Zhang, Ze [1 ]
Licht, Alexis [2 ]
De Vleeschouwer, David [3 ]
Wang, Zhixiang [4 ]
Li, Yanzhen [1 ,5 ]
Kemp, David B. [1 ]
Tan, Liangcheng [5 ,6 ,7 ]
Zhang, Rui [8 ]
Qiang, Xiaoke [5 ]
Huang, Chunju [1 ]
机构：
[1] China Univ Geosci, Sch Earth Sci, State Key Lab Biogeol & Environm Geol, Hubei Key Lab Crit Zone Evolut, Wuhan, Peoples R China
[2] Aix Marseille Univ, CEREGE, CNRS, IRD,INRAE, Aix En Provence, France
[3] Univ Munster, Inst Geol & Paleontol, Munster, Germany
[4] Chinese Acad Sci, Qinghai Inst Salt Lakes, Qinghai Prov Key Lab Geol & Environm Salt Lakes, Xining, Peoples R China
[5] Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China
[6] Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Ocean Continental Climate & Environm C, Qingdao, Peoples R China
[7] Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Peoples R China
[8] Hubei Normal Univ, Coll Urban & Environm Sci, Huangshi, Peoples R China
来源：
GEOPHYSICAL RESEARCH LETTERS | 2022年 / 49卷 / 23期
基金：
中国国家自然科学基金;
关键词：
East Asian summer monsoon; late Pliocene; Northern Hemisphere ice sheet; obliquity forcing; INTERTROPICAL CONVERGENCE ZONE; LATE MIOCENE; SUMMER MONSOON; WEATHERING RESPONSE; OCEAN CIRCULATION; RB/SR RECORD; EVOLUTION; CHINA; PRECIPITATION; PACIFIC;
D O I：
10.1029/2022GL101280
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Mio-Pliocene sedimentary archives of the East Asian summer monsoon (EASM) in NE Tibet record a monotonic response to orbital forcing, dominated by eccentricity. By contrast, Pleistocene archives display a more stochastic response that varies regionally and temporally. When and why this response changed is poorly understood. Here, we present a new high-resolution Rb/Sr ratio data set of EASM intensity from the Sanmenxia Basin, North China, that spans the Plio-Pleistocene transition. Our results indicate decreased monsoonal rainfall in the late Pliocene, dated at 2.75-2.6 Ma, associated with an intensified response to obliquity and enhanced climate stochasticity. This transition is attributed to the increase of Northern Hemisphere ice volume. Quaternary monsoons display a sensitivity unique to the modern icehouse with large bipolar ice sheets, while pre-Quaternary monsoons were solely impacted by Antarctic ice sheet dynamics on orbital time-scales.
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页数：11
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