Analysis on the Heavy Snow Weather Process in Benxi Area

作     者：KOU Si-cong CAO Wen 

作者机构：Benxi Meteorological ObservatoryLiaoning ProvinceBenxi 117000China Nanjing University of Information Science and TechnologyNanjing 210044China 

出 版 物：《Meteorological and Environmental Research》 (气象与环境研究(英文版))

年 卷 期：2011年第2卷第1期

页      面：24-27页

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

主　　题：Heavy snow Weather situation Physical quantity Process analysis Benxi area China 

摘      要：[Objective] The aim was to study the formation and development of a heavy snow in Benxi area. [Method] Based on conventional meteorological data, the formation and development of a heavy snow in Benxi area from December 4th to 5th in 2009 were analyzed from the aspects of weather situation evolution and physical quantity field feature. [Result] The heavy snow was caused by upper trough and North China cyclone. In this process, there was upper level divergence and lower level convergence over Benxi area, and it was warm at low attitude and cold at high attitude; southwest jet at low attitude transported water vapor from Bohai Sea to eastern Liaoning, which provided good water vapor condition for snow, but it didn’t reach heavy snow due to inadequate ascending force. The development of Ural Mountains high ridge played an important role in the snow process and the strengthened high ridge moving northward was beneficial to the southward movement of cold air and deepening of upper trough. Analysis on physical quantity field could provide reference for predicting beginning and ending time and strength of heavy snow. [Conclusion] The study could provide basis for the forecast of heavy snow.