气候变化领域集成服务门户(CCPortal): Differential ice volume and orbital modulation of Quaternary moisture patterns between Central and East Asia

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DOI	10.1016/j.epsl.2019.115901
	Differential ice volume and orbital modulation of Quaternary moisture patterns between Central and East Asia
	Li, Guoqiang; Yang, He; Stevens, Thomas; Zhang, Xiaojian; Zhang, Haixia; Wei, Haitao; Zheng, Weipeng; Li, Lijuan; Liu, Xiangjun; Chen, Jianhui; Xia, Dunsheng; Oldknow, Chris; Ye, Wei; Chen, Fahu
通讯作者	Li, GQ (通讯作者)
发表日期	2020
ISSN	0012-821X
EISSN	1385-013X
卷号	530
英文摘要	Desertification is of pressing environmental concern in large parts of Asia and directly affects millions of people. Arid Central Asia (ACA) in particular is highly sensitive to desertification and environmental change. Climate change in ACA may be driven by westerly circulation or monsoon variation. However, no consensus exists over their relative importance during the Quaternary and this greatly restricts our understanding of how this region may be affected by future climate change. Here we use the most detailed luminescence dating age model yet produced for ACA for three loess records in the Tianshan Mountains spanning the past 250 ka to show a sharp dichotomy in moisture variation between lowland and high mountain areas. The lowland areas of ACA are subjected to persistent aridity during past 250 ka, while highland areas clearly show dry-glacial and moist-interglacial changes, synchronous to moisture variability in monsoonal East Asia, and both co-varying with global ice volume and greenhouse gas (GHG) variation. In contrast, moisture variability across ACA within interglacials varies inversely with insolation-driven precessional changes. This is directly out of phase with the moisture changes of East Asia, which co-vary with precessional insolation changes, and indicates the influence of Westerly circulation in ACA. Our Flexible Global Ocean-Atmosphere-Land System model simulations further reveal that coupled ice volume and GHG variations dominated climatic variability in both ACA and East Asia over glacial interglacial cycles. However, the out of phase relationship between the intensity of the Westerly and East Asian monsoon systems during interglacial periods indicates that precessional forcing is responsible for differences in moisture patterns between ACA and East Asia. These observations indicate that moisture levels will not increase even in high altitude regions of ACA over the next several millennia; rather desertification is likely to worsen resulting from stabilization of the Westerlies as a result of low summer insolation. (C) 2019 Elsevier B.V. All rights reserved.
关键词	ARID CENTRAL-ASIA TIANSHAN MOUNTAINS K-FELDSPAR LOESS HOLOCENE CLIMATE LUMINESCENCE MONSOON RECORD MODEL
英文关键词	arid central Asia; luminescence dating; loess; climatic changes; Tianshan Mountains; glacial-interglacial cycles, interglacial
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000508747300026
来源期刊	EARTH AND PLANETARY SCIENCE LETTERS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260067
推荐引用方式 GB/T 7714	Li, Guoqiang,Yang, He,Stevens, Thomas,et al. Differential ice volume and orbital modulation of Quaternary moisture patterns between Central and East Asia[J]. 中国科学院青藏高原研究所,2020,530.
APA	Li, Guoqiang.,Yang, He.,Stevens, Thomas.,Zhang, Xiaojian.,Zhang, Haixia.,...&Chen, Fahu.(2020).Differential ice volume and orbital modulation of Quaternary moisture patterns between Central and East Asia.EARTH AND PLANETARY SCIENCE LETTERS,530.
MLA	Li, Guoqiang,et al."Differential ice volume and orbital modulation of Quaternary moisture patterns between Central and East Asia".EARTH AND PLANETARY SCIENCE LETTERS 530(2020).