DOI: 10.1175/JCLI-D-17-0284.1
Scopus记录号: 2-s2.0-85040557937
论文题名: Interannual variations of the first rainy season precipitation over South China
作者: Gu W. ; Wang L. ; Hu Z.-Z. ; Hu K. ; Li Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 2 起始页码: 623
结束页码: 640
语种: 英语
英文关键词: Atmosphere-ocean interaction
; Climate variability
; Climatology
; Interannual variability
; Thermodynamics
Scopus关键词: Atmospheric thermodynamics
; Climate change
; Climatology
; Mechanical waves
; Surface waters
; Thermodynamics
; Troposphere
; Atmosphere-ocean interactions
; Climate variability
; Convective instabilities
; East Asian summer monsoon
; Interannual variability
; Interannual variation
; Sea surface temperature (SST)
; Water vapor transport
; Oceanography
; air-sea interaction
; annual variation
; climate variation
; climatology
; monsoon
; precipitation (climatology)
; thermodynamics
; troposphere
; wind shear
; Pacific Ocean
; South China Sea
英文摘要: The first rainy season (FRS), also known as the presummer rainy season, is the first standing stage of the East Asian summer monsoon when over 40% of the annual precipitation is received over South China. Based on the start and end dates of the FRS defined by the China Meteorological Administration, this study investigates the interannual variations of the FRS precipitation over South China and its mechanism with daily mean data. The length and start/end date of the FRS vary year to year, and the average length of the FRS is 90 days, spanning from 6 April to 4 July. Composite analyses reveal that the years with abundant FRS precipitation over South China feature weakened anticyclonic wind shear over the Indochina Peninsula in the upper troposphere, southwestward shift of the western Pacific subtropical high, and anticyclonic wind anomalies over the South China Sea in the lower troposphere. The lower-tropospheric southwesterly wind anomalies are especially important because they help to enhance warm advection and water vapor transport toward South China, increase the lower tropospheric convective instability, and shape the pattern of the anomalous ascent over South China. It is further proposed that a local positive feedback between circulation and precipitation exists in this process. The variability of the FRS precipitation can be well explained by a zonal sea surface temperature (SST) dipole in the tropical Pacific and the associated Matsuno-Gill-type Rossby wave response over the western North Pacific. The interannual variability of both the SST dipole and the FRS precipitation over South China is weakened after the year 2000. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111750
Appears in Collections: 气候减缓与适应
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作者单位: Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, Beijing, China; Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Climate Prediction Center, NOAA/NWS/NCEP, College Park, MD, United States; National Meteorological Center, China Meteorological Administration, Beijing, China
Recommended Citation:
Gu W.,Wang L.,Hu Z.-Z.,et al. Interannual variations of the first rainy season precipitation over South China[J]. Journal of Climate,2018-01-01,31(2)