DOI: 10.1002/2016JD025515
论文题名: Atmospheric moisture budget and its regulation on the variability of summer precipitation over the Tibetan Plateau
作者: Wang Z. ; Duan A. ; Yang S. ; Ullah K.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 2 起始页码: 614
结束页码: 630
语种: 英语
英文关键词: atmospheric moisture budget
; interannual variability
; North Atlantic Oscillation
; summer precipitation
; Tibetan Plateau
Scopus关键词: annual variation
; atmospheric circulation
; atmospheric moisture
; atmospheric transport
; baroclinic mode
; boundary layer
; jet stream
; moisture content
; North Atlantic Oscillation
; precipitation (climatology)
; precipitation assessment
; summer
; temporal variation
; Asia
; China
; Europe
; Qinghai-Xizang Plateau
英文摘要: Based on station observations and reanalysis data sets, the atmospheric moisture budget and its critical role in regulating the variability of summer precipitation over the Tibetan Plateau (TP) are investigated. Results indicate that the yearly variability of summer precipitation over the southern TP (STP) is mainly controlled by remote moisture transport. Local surface evaporation presents an infinitesimal interannual fluctuation, but it cannot be ignored since it is a large component of total precipitation amount in every summer. Although the incoming moisture transport at the western boundary of STP is much weaker than that at the southern boundary, it primarily influences the temporal variation of STP summer precipitation. Further analysis shows that the summer North Atlantic Oscillation (NAO) also possesses a significant impact on the variation of STP summer precipitation. A strong NAO apparently weakens the moisture transport at the western boundary, inducing less precipitation over the STP. When the NAO is strong, wave-activity flux obviously diverges eastward from the subtropical high over northwestern Europe. Then such flux converges toward the western TP, which weakens the baroclinic vertical structure of atmospheric circulation over the TP. The NAO also influences the meridional position of the Asian jet stream and modulates the specific humidity and moisture transport at the western boundary of STP. In addition, the dynamic processes of the atmosphere are more important than the thermodynamic processes in regulating the variability of TP summer precipitation. ©2016. American Geophysical Union. All Rights Reserved. 资助项目: 2015A030310224
; 41605038
; 41661144019
; 91337216
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62758
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: School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Institute of Earth Climate and Environment System, Sun Yat-sen University, Guangzhou, China; Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, China; Department of Meteorology, COMSATS Institute of Information Technology, Islamabad, Pakistan
Recommended Citation:
Wang Z.,Duan A.,Yang S.,et al. Atmospheric moisture budget and its regulation on the variability of summer precipitation over the Tibetan Plateau[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(2)