globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2017JD026530
论文题名:
Subtropical westerly jet waveguide and winter persistent heavy rainfall in south China
作者: Ding F.; Li C.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期:14
起始页码: 7385
结束页码: 7400
语种: 英语
英文关键词: large spatial persistent heavy rainfall ; Rossby wave ; westerly jet waveguide
英文摘要: Using observed daily precipitation and National Centers for Environmental Prediction-National Center for Atmospheric Research reanalysis data, what induced winter large spatial persistent heavy rainfall (PHR) events in south China was examined, based on composite analyses of 30 large spatial PHR events during 1951–2015. The results showed that wave trains within North Africa-Asia (NAA) westerly jet existed in upper troposphere during these PHR processes. The wave trains shared the characteristic of a Rossby wave. The Rossby wave originated from northwest Europe, entered into the NAA jet through strong cold air advection to form convergence over the Mediterranean, and then propagated eastward along subtropical NAA jet. The Rossby wave propagated toward Southeast Asia and caused strong divergence in the upper troposphere. The strong divergence in the upper troposphere induced vertical convection and favored large spatial PHR events in south China. In addition, the enhanced India-Burma trough and subtropical high in the northwestern Pacific supplied enough water vapor transportation. This mechanism would be useful to the medium-range forecast of such winter rainfall processes over south China. ©2017. American Geophysical Union. All Rights Reserved.
资助项目: 41130859 ; 41276002
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62641
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: Qingdao Engineering Technology Research Center of Meteorological Disaster Prevention, Qingdao Meteorological Bureau, Qingdao, China; Physical Oceanography Laboratory, Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Ocean–Atmosphere Interaction and Climate in Universities of Shandong, Ocean University of China, Qingdao, China

Recommended Citation:
Ding F.,Li C.. Subtropical westerly jet waveguide and winter persistent heavy rainfall in south China[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(14)
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