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The 3.6-Ma aridity and westerlies history over midlatitude Asia linked with global climatic cooling

文献类型：期刊论文

作者Fang, Xiaomin1,2,3; An, Zhisheng3,4,5; Clemens, Steven C.6; Zan, Jinbo1,2; Shi, Zhengguo3,7; Yang, Shengli8; Han, Wenxia9
刊名PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
出版日期2020-10-06
卷号117期号:40页码:24729-24734
ISSN号0027-8424
关键词dust emission Taklimakan loess sequence Asian inland aridification global cooling Plio-Quaternary
DOI10.1073/pnas.1922710117
通讯作者Fang, Xiaomin(fangxm@itpcas.cn) ; An, Zhisheng(anzs@loess.llqg.ac.cn)
英文摘要Midlatitude Asia (MLA), strongly influenced by westerlies-controlled climate, is a key source of global atmospheric dust, and plays a significant role in Earth's climate system . However, it remains unclear how the westerlies, MLA aridity, and dust flux from this region evolved over time. Here, we report a unique high-resolution eolian dust record covering the past 3.6 Ma, retrieved from the thickest loess borehole sequence (671 m) recovered to date, at the southern margin of the Taklimakan desert in the MLA interior. The results show that eolian dust accumulation, which is closely related to aridity and the westerlies, indicates existence of a dry climate, desert area, and stable land surface, promoting continuous loess deposition since at least similar to 3.6 Ma. This region experienced long-term stepwise drying at similar to 2.7, 1.1, and 0.5 Ma, coeval with a dominant periodicity shift from 41-ka cyclicity to 100-ka cyclicity between 1.1 Ma and 0.5 Ma. These features match well with global ice volume variability both in the time and frequency domains (including the Mid-Pleistocene Transition), highlighting global cooling-forced aridity and westerlies climate changes on these timescales. Numerical modeling demonstrates that global cooling can dry MLA and intensify the westerlies, which facilitates dust emission and transport, providing an interpretive framework. Increased dust may have promoted positive feedbacks (e.g., decreasing atmospheric CO2 concentrations and modulating radiation budgets), contributing to further cooling. Unraveling the long-term evolution of MLA aridity and westerlies climate is an indispensable component of the unfolding mystery of global climate change.
WOS关键词LAST GLACIAL MAXIMUM ; DUST STORM ; ASTRONOMICAL CALIBRATION ; NORTH PACIFIC ; GRAIN-SIZE ; UPLIFT ; INSOLATION ; MOUNTAINS ; ICE ; PLIOCENE
资助项目National Natural Science Foundation of China ; CAS[XDB40000000] ; CAS[QYZDY-SSWDQC001] ; CAS[XDA20000000] ; Ministry of Science and Technology of China
WOS研究方向Science & Technology - Other Topics
语种英语
出版者NATL ACAD SCIENCES
WOS记录号WOS:000579059100024
资助机构National Natural Science Foundation of China ; CAS ; Ministry of Science and Technology of China
源URL[http://ir.ieecas.cn/handle/361006/15428]  
专题地球环境研究所_黄土与第四纪地质国家重点实验室（2010~）
第四纪科学与全球变化卓越创新中心
通讯作者Fang, Xiaomin; An, Zhisheng
作者单位1.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
4.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
5.Beijing Normal Univ, Interdisciplinary Res Ctr Earth Sci Frontier, Beijing 100875, Peoples R China
6.Brown Univ, Earth Environm & Planetary Sci, Providence, RI 02912 USA
7.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Ocean Continental Climate & Environm, Qingdao 266061, Peoples R China
8.Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China
9.Linyi Univ, Sch Resource & Environm Sci, Shandong Prov Key Lab Water & Soil Conservat & En, Linyi 276000, Shandong, Peoples R China
推荐引用方式
GB/T 7714		 Fang, Xiaomin,An, Zhisheng,Clemens, Steven C.,et al. The 3.6-Ma aridity and westerlies history over midlatitude Asia linked with global climatic cooling[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(40):24729-24734.
APA Fang, Xiaomin.,An, Zhisheng.,Clemens, Steven C..,Zan, Jinbo.,Shi, Zhengguo.,...&Han, Wenxia.(2020).The 3.6-Ma aridity and westerlies history over midlatitude Asia linked with global climatic cooling.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(40),24729-24734.
MLA Fang, Xiaomin,et al."The 3.6-Ma aridity and westerlies history over midlatitude Asia linked with global climatic cooling".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.40(2020):24729-24734.

入库方式： OAI收割

来源：地球环境研究所

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