globalchange  > 气候变化与战略
DOI: 10.1175/JCLI-D-18-0112.1
Scopus ID: 2-s2.0-85061813814
Observed decadal transition in trend of autumn rainfall over central China in the late 1990s
Author: Wang Z.; Zhou B.
Source Publication: Journal of Climate
ISSN: 8948755
Publishing Year: 2019
Volume: 32, Issue:5
pages begin: 1395
pages end: 1409
Language: 英语
Scopus Keyword: Moisture ; Sea level ; Surface waters ; Atlantic Ocean ; Autumn rainfall ; Central chinas ; Cooling trends ; Moisture convergence ; Moisture transport ; Sea level pressure ; Sea surface temperatures ; Rain
English Abstract: This article presents a decadal transition from a decreasing trend to an increasing trend in the late 1990s for autumn rainfall in central China. The atmospheric and oceanic background underlying this regime shift is also addressed. Accompanying the above decadal transition, the moisture convergence and ascending motion averaged in central China both switch from a weakening trend to a strengthening trend. Meanwhile, after the late 1990s, the declining of the Asian sea level pressure (SLP) and the deepening of the Lake Balkhash trough may induce more cold air from high latitudes to break out southward. The strengthening of the low-level southerly in East Asia could transport more moisture northward from low latitudes. More cold air and more warm-moist airflow encountering in the targeted region contribute to the increasing trend of local rainfall. The situation before the late 1990s is generally reversed, which accounts for the decreasing trend of autumn rainfall. The movement of the East Asian jet (EAJ) from southward to northward also has a contribution via its influence on dynamic condition. Additionally, changes in the sea surface temperatures (SSTs) in the western Indian and Atlantic Oceans from a cooling trend to a warming trend in the late 1990s play significant roles through their modulations on moisture transport and cold-air activities. © 2019, American Meteorological Society.
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被引频次[WOS]:3   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:气候变化与战略

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Wang Z.,Zhou B.. Observed decadal transition in trend of autumn rainfall over central China in the late 1990s[J]. Journal of Climate,2019-01-01,32(5)
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