2006年春季河南一次强寒潮天气诊断分析

应用1°×1°NCAR／NCEP再分析格点资料，对2006年4月11-12日发生在河南省的一次强寒潮天气过程进行了热力因子和动力因子的诊断分析，结果发现：这次寒潮天气过程是西路和东路两股冷空气与暖平流共同作用促进蒙古气旋发展，并使低槽、冷锋东移南压造成的；不同的层结条件下垂直速度对河南前期增温、后期剧烈降温有利；非地转...

Diagnostic Analysis of a Strong Cold Wave Over Henan Province in April 2006

By using 1 ° × 1 ° NCAR/NCEP reanalysis grid data, a strong cold wave weather was diagnosed by analyzing the heat factor and power factor, which happened in Henan province during April 11- 12, 2006. The results showed that the cold air coming from west load and east load co-act with warm advection to induce the development of Mongolia cyclone, on the other hand, lead low trough and cold front eastward movement and southward push down, which produce the cold wave process. The vertical velocity in different stratification conditions is beneficial to pre-warming and post-cooling sharply in Henan. The strength variety and movement of sinking branch of the secondary circulation stimulated by ageostrophic wet Q vector, has a good relationship with the change of windy weather in Henan. The movement and development of vertical helicity area with great value has a good indication for the gale loading zone.