气候变化领域集成服务门户(CCPortal): Westerly jet stream controlled climate change mode since the Last Glacial Maximum in the northern Qinghai-Tibet Plateau

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DOI	10.1016/j.epsl.2020.116529
	Westerly jet stream controlled climate change mode since the Last Glacial Maximum in the northern Qinghai-Tibet Plateau
	Li Y.; Peng S.; Liu H.; Zhang X.; Ye W.; Han Q.; Zhang Y.; Xu L.; Li Y.
发表日期	2020
ISSN	0012821X
卷号	549
英文摘要	Climate change from the northern Qinghai-Tibet Plateau (QTP) is affected by the combined effects of the Asian summer monsoon and the westerlies. However, changes in monsoon vapor transport and the westerly jet stream, as well as their effect to climate change mode there, are not clear at different time scales. Here we present composite research using paleoclimate reconstructions and ensemble simulations since the Last Glacial Maximum (LGM) on the basis of an eolian sedimentary sequence in the northern QTP. Results from 317 surface sediment samples show that pedogenic carbonate δ18O is affected both by precipitation and temperature, and organic carbon isotope (δ13Corg) reflects the vegetation growth status in areas where precipitation is greater than 290 mm. Proxies from the sedimentary sequence and the Paleoclimate Modeling Intercomparison Project 3 (PMIP3) simulations show a close relationship between climate change mode in the northern QTP and the westerly jet stream whose movement is triggered by warm or cold conditions in the high-latitude regions. That is, when the climate is in cold/glacial period the westerly jet stream strengthens and moves southward, and the mountains become wetter. This climate change mode can be validated by records from mountains of North America and Africa. According to the CMIP5 simulations, the westerly jet stream will strengthen in the future, and climate in the northern QTP and the high-altitude region of the mid-latitudes will become wetter with global warming. © 2020 Elsevier B.V.
关键词	climate change mode climate simulations eolian sediments Last Glacial Maximum westerly jet stream
英文关键词	Atmospheric thermodynamics; Global warming; Organic carbon; Sedimentology; Asian summer monsoons; High-latitude regions; Model inter comparisons; Paleoclimate reconstruction; Pedogenic carbonates; Qinghai Tibet plateau; Sedimentary sequence; Westerly jet streams; Glacial geology; climate change; climate modeling; CMIP; eolian deposit; jet stream; Last Glacial Maximum; monsoon; paleoclimate; reconstruction; westerly; China; Qinghai-Xizang Plateau
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202728
作者单位	Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Center for Hydrologic Cycle and Water Resources in Arid Region, Lanzhou University, Lanzhou, 730000, China
推荐引用方式 GB/T 7714	Li Y.,Peng S.,Liu H.,et al. Westerly jet stream controlled climate change mode since the Last Glacial Maximum in the northern Qinghai-Tibet Plateau[J],2020,549.
APA	Li Y..,Peng S..,Liu H..,Zhang X..,Ye W..,...&Li Y..(2020).Westerly jet stream controlled climate change mode since the Last Glacial Maximum in the northern Qinghai-Tibet Plateau.Earth and Planetary Science Letters,549.
MLA	Li Y.,et al."Westerly jet stream controlled climate change mode since the Last Glacial Maximum in the northern Qinghai-Tibet Plateau".Earth and Planetary Science Letters 549(2020).