气候变化领域集成服务门户(CCPortal): Effect of marginal topography around the Tibetan Plateau on the evolution of central Asian arid climate: Yunnan–Guizhou and Mongolian Plateaux as examples

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DOI	10.1007/s00382-019-04796-z
	Effect of marginal topography around the Tibetan Plateau on the evolution of central Asian arid climate: Yunnan–Guizhou and Mongolian Plateaux as examples
	Shi Z.; Sha Y.; Liu X.; Xie X.; Li X.
发表日期	2019
ISSN	0930-7575
起始页码	4433
结束页码	4445
卷号	53 期号:2020-07-08
英文摘要	Mountains are believed to have played an important role in the evolution of modern arid climate over central Asia. The main topography of the Tibetan Plateau (TP) suppresses the regional atmospheric rainfall by both the modulation of atmospheric circulation and blocking of water vapor transport from the ocean. In this study, the effect of Yunnan–Guizhou and Mongolian Plateaux (YGP and MP, respectively), two marginal topographies around the main TP, on the central Asian aridity are evaluated using general circulation model experiments. The results show that the precipitation over central Asia is significantly decreased by these two topographies. Compared to the whole TP-induced annual precipitation decrease of 0.45 mm/d, the contributions of the YGP and MP reach 0.14 mm/d and 0.08 mm/d, respectively. These two marginal mountains occupy approximately one half of the total change by the TP although they are much smaller in heights and sizes. The orographic forcing of the TP suppresses the precipitation significantly throughout the year while those of YGP and MP are mainly effective in boreal winter. A moisture budget analysis shows that all the mountains examined drive increases in subsidence and resulting decreases in humidity over central Asia, with smaller or opposing roles for changes in horizontal winds. These subsidence changes dominate the drying of Central Asia due to the TP and MP, and are largely driven by the influences of the topography on stationary waves. In contrast, the YGP dries Central Asia primarily through altering transient eddies. The forcing of YGP and MP originate from the mechanical blocking of the tropical easterly and mid-latitude westerly, respectively, which exert significant changes in atmospheric circulation. This implies that the effect of small-scale mountains on arid climate over central Asia might be underestimated and a considerable proportion of mechanical effect of the TP on the Asian aridity actually comes from its margins. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Arid climate; Central Asia; Marginal topography; Mechanical effect; Numerical simulation; Tibetan Plateau
语种	英语
scopus关键词	airflow; arid region; aridity; atmospheric circulation; atmospheric transport; climate forcing; climate modeling; computer simulation; general circulation model; mountain region; numerical model; orographic effect; plateau; rainfall; regional climate; topographic effect; water vapor; Central Asia; China; Mongolian Plateau; Qinghai-Xizang Plateau; Yunnan-Guizhou Plateau
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145970
作者单位	State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710061, China; Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi’an, China; Open Studio for Oceanic-Continental Climate and Environment Changes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Department of Earth and Environmental Sciences, Xi’an Jiaotong University, Xi’an, China; Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Shi Z.,Sha Y.,Liu X.,等. Effect of marginal topography around the Tibetan Plateau on the evolution of central Asian arid climate: Yunnan–Guizhou and Mongolian Plateaux as examples[J],2019,53(2020-07-08).
APA	Shi Z.,Sha Y.,Liu X.,Xie X.,&Li X..(2019).Effect of marginal topography around the Tibetan Plateau on the evolution of central Asian arid climate: Yunnan–Guizhou and Mongolian Plateaux as examples.Climate Dynamics,53(2020-07-08).
MLA	Shi Z.,et al."Effect of marginal topography around the Tibetan Plateau on the evolution of central Asian arid climate: Yunnan–Guizhou and Mongolian Plateaux as examples".Climate Dynamics 53.2020-07-08(2019).