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.

引用

页数：11

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