DOI: 10.1002/2016JD025077
论文题名: Role of intraseasonal oscillation in the persistent extreme precipitation over the Yangtze River Basin during June 1998
作者: Sun X. ; Jiang G. ; Ren X. ; Yang X.-Q.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期: 18 起始页码: 10453
结束页码: 10469
语种: 英语
英文关键词: intraseasonal oscillation (ISO)
; northwest Pacific
; persistent extreme precipitation event (PEPE)
; South China Sea (SCS)
; Yangtze River Basin (YRB)
Scopus关键词: atmosphere-ocean coupling
; climate oscillation
; convection
; extreme event
; meridional circulation
; persistence
; precipitation assessment
; precipitation intensity
; sea surface temperature
; seasonal variation
; teleconnection
; China
; Far East
; Indian Ocean
; Indian Ocean (North)
; Pacific Ocean
; Pacific Ocean (Northwest)
; Philippine Sea
; South China Sea
; Yangtze Basin
英文摘要: The persistent extreme precipitation event (PEPE) that occurred over the Yangtze River Basin (YRB) during the period of 12–27 June 1998 is the most severe one in recent 60 years, and it is mainly caused by two significant components of intraseasonal oscillation (ISO) (10–30 days and 30–60 days) identified in this study. The two ISOs play different roles in the distributions of YRB rain belt in the PEPE; i.e., the 30–60 day ISO generally maintains the shape and intensity of YRB rain belt with its peak covering the whole PEPE period; however, the 10–30 day ISO mainly determines the south-north swing of the YRB rain belt that features three PEPE stages. North Indian Ocean is the major forcing region of 30–60 day ISO, where anomalous warm sea surface temperature-induced local strong convections stimulate a meridional teleconnection wave train over the East Asia, generating the 30–60 day intraseasonal YRB rainfalls. The 10–30 day ISO primarily originates from the northwest Pacific and the South China Sea (SCS), and along with its northwestward and northeastward propagations due to the air-sea coupling and prevailing winds, suppressed and enhanced convections appear alternatively over the Philippine Sea and the central SCS in the three PEPE stages; thus, their stimulated downstream wave trains along the coast of East Asia vary accordingly in terms of phase and position, causing three stages of 10–30 day intraseasonal YRB rainfalls with different intensities and locations. These results suggest that proper combination of different intraseasonal oscillations is one of the essential and effective ways to produce the PEPEs. ©2016. American Geophysical Union. All Rights Reserved. 资助项目: 41275069
; 41330420
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62851
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: CMA-NJU Joint Laboratory for Climate Prediction Studies, Institute for Climate and Global Change Research, School of Atmospheric Sciences, Nanjing University, Nanjing, China
Recommended Citation:
Sun X.,Jiang G.,Ren X.,et al. Role of intraseasonal oscillation in the persistent extreme precipitation over the Yangtze River Basin during June 1998[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(18)