【摘要】 对2003年2月10日至11日发生在南京的一次寒潮降温降雨(雪)的主要影响系统,如阻塞高压、高空槽、横槽、中低层暖式切变线、地面冷锋以及地面暖低压倒槽等进行了描述和分析,并对某些物理量进行了分析。分析得出:这次寒潮降温降雨(雪)天气是在高空500hPa乌拉尔山阻塞高压崩溃、巴尔喀什湖至准噶尔盆地的横槽转竖,冷空气从西北路径东移南下,中低层冷槽与暖式切变线接合以及地面冷锋切入暖低压倒槽等天气系统的作用下发生的,并归纳出此类天气预报的指示系统,对于做好寒潮天气预报具有指导作用。更多还原

【Abstract】 A weather process along with cold wave,temperature decreasing and rain(snow) appeared in Nanjing on 10 February 2003.Some main weather systems,included blocking high, high trough,across trough,middle and low layer warm shear line,ground cold front as well as ground warm low upend trough and so on,were described and some physical variables were analyzed.The results showed: this weather process happened in effects of some weather systems,such as upper air 500hpa Ural Mountains blocking high collapsing,across trough from the Lake Balkhash to Dzungar basin turned upright,cold air moving from northwest to south,middle and low layer cold trough jointing with warm shear line and ground cold front cuting into warm low upend trough.The paper concluded indicating system of this kind of weather forecast and has instruction function to make cold wave forecast.更多还原