DOI: 10.1175/JCLI-D-16-0105.1
Scopus记录号: 2-s2.0-85012292901
论文题名: Effect of Yunnan-Guizhou topography at the southeastern Tibetan Plateau on the Indian monsoon
作者: Shi Z. ; Sha Y. ; Liu X.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 4 起始页码: 1259
结束页码: 1272
语种: 英语
Scopus关键词: Climate models
; Topography
; Climate sensitivity
; General circulation model
; Indian subcontinents
; Monsoon precipitation
; Monsoons
; Orographic effects
; Paleoclimates
; Summer precipitation
; Atmospheric thermodynamics
; airflow
; climate modeling
; general circulation model
; monsoon
; orographic effect
; paleoclimate
; precipitation (climatology)
; topography
; Arabian Sea
; Bay of Bengal
; China
; Indian Ocean
; Qinghai-Xizang Plateau
; Yunnan-Guizhou Plateau
英文摘要: Topographic insulation is one of the primary origins for the influence of the Tibetan Plateau (TP) on Asian climate. The Yunnan-Guizhou (YG) Plateau, at the southeastern margin of the TP, is known to block the northern branch of the Indian monsoon circulation in summer. However, it is an open question whether this blocking feeds back to the monsoon. In this study, the effect of the YG topography on the Indian monsoon and its comparison with that of the TP were evaluated using general circulation model experiments. The results showed that the TP strengthens the monsoon precipitation, especially during the onset. However, the YG topography significantly weakens the monsoon. With the YG topography, strengthened low-level airflow around the YG Plateau induces anomalous anticyclonic winds to the southwest, and the changes remodulate the whole circulation structure over Asia. As a result, the Indian monsoon becomes weakened from the Bay of Bengal to the Indian subcontinent and Arabian Sea, as does the associated precipitation. In addition, the YG topography affects the anomalous warming center over the TP and the precipitation during the monsoon onset. The YG-reduced summer precipitation occupied approximately one-third of the total increment compared to the entire TP. The Indian monsoon weakened by YG topography distinctly opposes the traditional paleoclimatic viewpoint that all of the TP topography contributes to the monsoon strengthening. In fact, the climatic effect of the TP depends closely upon both its central and marginal topography, and the topography of its subterrains does not necessarily play a similar role. © 2017 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
; CAS, Chinese Academy of Sciences
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49735
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China; Joint Center for Global Change Studies, Beijing, China
Recommended Citation:
Shi Z.,Sha Y.,Liu X.. Effect of Yunnan-Guizhou topography at the southeastern Tibetan Plateau on the Indian monsoon[J]. Journal of Climate,2017-01-01,30(4)