Characteristic Analysis of Short Time Heavy Rain in Yulin, China  

Characteristic Analysis of Short Time Heavy Rain in Yulin, China

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作  者:Yiqing Xiao Qiyuan Hu Pingyun Li Jing Yao Yiqing Xiao;Qiyuan Hu;Pingyun Li;Jing Yao(Shaanxi Meteorological Observatory, Xi’an, China)

机构地区:[1]Shaanxi Meteorological Observatory, Xi’an, China

出  处:《Journal of Geoscience and Environment Protection》2023年第9期165-175,共11页地球科学和环境保护期刊(英文)

摘  要:National Centers for Environment Prediction (NCEP) reanalysis data, automatic observation data, FY-2E satellite data and Doppler radar data are used to analyze a short-time local heavy rain in Yulin city, Shaanxi, China on August 7, 2018. The result shows that the strong convective weather occurred in peripheral subtropical high over west pacific, being caused by short wave disturbance, and surface convergence lines with positive pressure variation are corresponding to areas of short-time heavy precipitation. The degree of temperature change in cold pool caused by thunderstorm may decide the intensity of a short-time rainfall, and local topography plays an important role in extreme precipitation. Local water vapour accumulation and water vapour flux convergence in the middle and lower layers support adequate moisture condition in the process. Moving direction and development direction of mesocale convective cloud are in a line to develop the train effect, leading to local short-time heavy rain in Yulin city, Shaanxi, China.National Centers for Environment Prediction (NCEP) reanalysis data, automatic observation data, FY-2E satellite data and Doppler radar data are used to analyze a short-time local heavy rain in Yulin city, Shaanxi, China on August 7, 2018. The result shows that the strong convective weather occurred in peripheral subtropical high over west pacific, being caused by short wave disturbance, and surface convergence lines with positive pressure variation are corresponding to areas of short-time heavy precipitation. The degree of temperature change in cold pool caused by thunderstorm may decide the intensity of a short-time rainfall, and local topography plays an important role in extreme precipitation. Local water vapour accumulation and water vapour flux convergence in the middle and lower layers support adequate moisture condition in the process. Moving direction and development direction of mesocale convective cloud are in a line to develop the train effect, leading to local short-time heavy rain in Yulin city, Shaanxi, China.

关 键 词:Short-Time Rain Storm Precipitable Water Vapor Flux Divergence Train Effect 

分 类 号:F42[经济管理—产业经济]

 

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