Effect of marginal topography around the Tibetan Plateau on the evolution of central Asian arid climate: Yunnan-Guizhou and Mongolian Plateaux as examples

doi:10.1007/s00382-019-04796-z

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	Effect of marginal topography around the Tibetan Plateau on the evolution of central Asian arid climate: Yunnan-Guizhou and Mongolian Plateaux as examples
	Shi, Zhengguo1,2,3,4 ; Sha, Yingying 1; Liu, Xiaodong 1; Xie, Xiaoning 1; Li, Xinzhou1,5
通讯作者	Shi, Zhengguo(shizg@ieecas.cn)
	2019-10-01
发表期刊	CLIMATE DYNAMICS
ISSN	0930-7575
卷号	53 期号:7-8 页码:4433-4445
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.
关键词	Arid climate Central Asia Tibetan Plateau Marginal topography Mechanical effect Numerical simulation
DOI	10.1007/s00382-019-04796-z
关键词[WOS]	LAND-SEA DISTRIBUTION ; EURASIAN CLIMATE ; UPLIFT ; MONSOON ; OROGRAPHY ; ARIDIFICATION ; MOUNTAINS ; IMPACTS ; SENSITIVITY ; TRANSITION
收录类别	SCI ; SCI
语种	英语
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDA20070103] ; National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41572160] ; Chinese Academy of Sciences[QYZDY-SSW-DQC001] ; Chinese Academy of Sciences[ZDBS-SSW-DQC001] ; Youth Innovation Promotion Association CAS ; Innovative Talents Promotion Plan of Shaanxi[2017KJXX-51]
WOS研究方向	Meteorology & Atmospheric Sciences
项目资助者	Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; Innovative Talents Promotion Plan of Shaanxi
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000489753900038
出版者	SPRINGER
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/13272
专题	现代环境研究室第四纪科学与全球变化卓越创新中心
通讯作者	Shi, Zhengguo
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian, Shaanxi, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Open Studio Ocean Continental Climate & Environ, Qingdao, Shandong, Peoples R China 4.Xi An Jiao Tong Univ, Dept Earth & Environm Sci, Xian, Shaanxi, Peoples R China 5.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Shi, Zhengguo,Sha, Yingying,Liu, Xiaodong,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[J]. CLIMATE DYNAMICS,2019,53(7-8):4433-4445.
APA	Shi, Zhengguo,Sha, Yingying,Liu, Xiaodong,Xie, Xiaoning,&Li, Xinzhou.(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(7-8),4433-4445.
MLA	Shi, Zhengguo,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 53.7-8(2019):4433-4445.