气候变化领域集成服务门户(CCPortal): One and a Half Million Yearlong Aridity During the Middle Eocene in North-West China Linked to a Global Cooling Episode

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DOI	10.1029/2020JB021037
	One and a Half Million Yearlong Aridity During the Middle Eocene in North-West China Linked to a Global Cooling Episode
	Zhang R.; Kravchinsky V.A.; Qin J.; Goguitchaichvili A.; Li J.
发表日期	2021
ISSN	21699313
卷号	126 期号:3
英文摘要	The Eocene record of substantial aridification near Tibet was reported to mimic the global climate cooling trend, overwriting the previously proposed dominant role of the Tibetan Plateau uplift in the aridification (Li et al., 2018, https://doi.org/10.1038/s41467-018-05415-x). Here we present new paleoclimate data from the red clay sequence deposited between 40 and 50 Ma in Altun Shan at the northeastern edge of the Tibetan Plateau. After building an age model using a compilation of magnetostratigraphy and cyclostratigraphy, we demonstrate that our record of magnetic susceptibility in the Altun Shan red clay exhibits variations linked to eccentricity cycles. Our age model allows us to estimate the age of eight short geomagnetic events, cryprochrons, in Altun Shan. Further we show that the aridification interval in Altun Shan coincides with (i) a cooling event recorded in the global oxygen isotope record, (ii) a sea surface temperature record on the east Tasmanian plateau, and (iii) an aridity record in the surrounding sedimentary basins of Central Asia. The middle Eocene aridity and cooling reached its maximum 45.5-44 Ma. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Asian monsoon; climate cooling; cyclostratigraphy; eccentricity cycles; Eocene; magnetostratigraphy
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187264
作者单位	Department of Geology, Institute of Cenozoic Geology and Environment, State Key Laboratory of Continental Dynamics, Northwest University, Xi'an, China; Department of Physics, Geophysics, University of Alberta, Edmonton, Alberta, Canada; State Key laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; CAS Center for Excellence in Quaternary Science and Global, Chinese Academy of Sciences, Xi'an, China; Servicio Arqueomagnético Nacional, Instituto de Geofísica, Univesidad Nacional Autónoma de México, Campus Morelia, Morelia, Mexico; Chengdu Center of Geological Survey, China Geological Survey, Chengdu, China
推荐引用方式 GB/T 7714	Zhang R.,Kravchinsky V.A.,Qin J.,et al. One and a Half Million Yearlong Aridity During the Middle Eocene in North-West China Linked to a Global Cooling Episode[J],2021,126(3).
APA	Zhang R.,Kravchinsky V.A.,Qin J.,Goguitchaichvili A.,&Li J..(2021).One and a Half Million Yearlong Aridity During the Middle Eocene in North-West China Linked to a Global Cooling Episode.Journal of Geophysical Research: Solid Earth,126(3).
MLA	Zhang R.,et al."One and a Half Million Yearlong Aridity During the Middle Eocene in North-West China Linked to a Global Cooling Episode".Journal of Geophysical Research: Solid Earth 126.3(2021).