DOI: 10.1002/joc.5321
论文题名: Interannual variation of precipitation over the Hengduan Mountains during rainy season
作者: Dong D. ; Huang G. ; Tao W. ; Wu R. ; Hu K. ; Li C.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 4 起始页码: 2112
结束页码: 2125
语种: 英语
英文关键词: central and eastern Pacific cooling
; precipitation
; SCS cyclone
; Silk Road pattern
; the Hengduan Mountains
; vertical motions
Scopus关键词: Advection
; Mechanical waves
; Moisture
; Nickel compounds
; Precipitation (chemical)
; Roads and streets
; Silk
; Storms
; Surface waters
; Eastern pacific
; Geopotential height anomalies
; Hengduan Mountains
; Interannual variability
; Northern South China Sea
; Precipitation anomalies
; Silk roads
; Vertical motions
; Landforms
; annual variation
; cooling
; cyclone
; precipitation (climatology)
; Rossby wave
; temperature gradient
; Walker circulation
; zonal wind
; China
; Hengduan Mountains
; Pacific Ocean
; South China Sea
英文摘要: The present study investigates the interannual variability of precipitation over the Hengduan Mountains (HMs) during rainy season based on daily precipitation dataset of 151 meteorological stations. More HMs precipitation is associated with an anomalous lower level cyclonic circulation over the northern South China Sea (SCS) and the upper level Silk Road pattern (SRP)-like geopotential height anomalies. Along the north flank of the anomalous cyclonic circulation, easterly wind anomalies weaken climatology winds and prevent further movement of southwest moisture transport, leading to the enhancement of moisture convergence over HMs. Diagnosis shows that anomalous vertical motions are owing to the advection of anomalous temperature by basic zonal winds. The anomalous lower level cyclonic circulation over the northern SCS is related to La Niña-like sea surface cooling in the equatorial central and eastern Pacific. This cooling adjusts the Walker Circulation, causing positive precipitation anomalies near the SCS, which trigger the anomalous cyclonic circulation as a warm Rossby wave response. The distribution of upper level geopotential height anomalies over the mid-latitude Asian land resembles the SRP. Due to its barotropic structure, the SRP leads to warm and cold anomalies over the central Asia and the central China, respectively. The advection of anomalous temperature gradient by mean westerlies leads to anomalous ascending motions and more precipitation over HMs. © 2017 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117054
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, China; Joint Center for Global Change Studies, Beijing, China; Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Dong D.,Huang G.,Tao W.,et al. Interannual variation of precipitation over the Hengduan Mountains during rainy season[J]. International Journal of Climatology,2018-01-01,38(4)