安徽农业科学2017，Vol.45Issue(6)：205-208,233,5.
一次东北冷涡暴雪过程分析
Analysis on an Snowstorm Event Caused by Northeast Cold Vortex
摘要
Abstract
The routine surface observational data and NCEP reanalysis data are used to analyze a persistant snowstorm process of a northeast cold vortex in the Northeast China during 16-19 November,2013.The results show snowstorm appears near convergence line of the low troposphere,and there is warm ridge in the low troposphere and cold trough in the middle troposphere.The source of water vapor is the seas off northeast China's eastern coastline,and water vapor flux at lower troposphere is above 2 g/(cm·hPa·s).At the initial stage,its baroclinic characteristic is obvious,which provides advantageous condition for the occurrence of snowstorm.At the stage of maturity and decay,snow tends to weaken.Snowstorm often occur in the stiff and dense zone of the θse contour line,where the convective stability is small.关键词
东北冷涡/暴雪/系统配置/物理量Key words
Northeast cold vortex/Snowstorm/System configuration/Physical quantity分类
农业科技引用本文复制引用
国世友,吴岩,关铭,孙庆丰..一次东北冷涡暴雪过程分析[J].安徽农业科学,2017,45(6):205-208,233,5.基金项目
2016年中国气象局核心业务发展专项(CMAHX20160206). （CMAHX20160206）
