一次全国性寒潮暴雪天气过程分析

应用MICAPS资料,从大气环流形势演变、物理量诊断分析两个方面,对2003年2月7～11日出现的一次全国性寒潮暴雪天气过程进行了分析.结果表明,这次寒潮暴雪天气是典型的欧亚环流发展和东亚大槽建立的过程,主要表现为由纬向环流转变为经向环流的环流形势调整,且以冷空气堆积、加强并大举南下为背景条件.由此揭示此类天气系统的特点,为类似天气的预报提供思路和启示.

Analysis of a Nationally Cold Wave and Heavy Snow

Based on the Micaps data of cold wave and heavy snow on February 7-11, 2003, analyzed the atmosphere circulation situation and physical quantity field. It is indicate that the cold wave and snowfall was a typical process of development of Eurasia circulution and foundation of east Asia big trough which mostly represented the adjustion of circumfluence from latitende direction turn to via direction, moreover the cold air accumulate, strengthen, breake out southward was background condition. It will profit to do real-time operational forecast.