Cause Analysis of a Heavy Snowstorm over Northern Xinjiang in Late Autumn of 2011
The cause of a snowstorm process over the northern Xinjiang in October 2011 is analyzed in this paper.The results show that the snowstorm was formed when the European ridge declined and Urals trough moved into Xinjiang; the secondary circulation caused by the dynamic frontogenesis mechanism with thermal force and dynamic force directly generated the mesoscale system for the snowstorm; the snowstorm happened in the area where MPV1 was above 0 and growed obviously while the absolute value of MPV2 also got big growth,and θe lines were dense;the MPV distribution structure promoted the large growth of vertical vorticity,which was beneficial to the generation and strenthening of snowstorm.High and low-level jet made great contribution to water vapor transfer,the development of circulation and water vapor condensed.
snowstorm causesecondary circulationinstability conditionvapor transferhigh and low-level jet
国家科技期刊平台
NSTL
万方数据
维普
