【摘要】 本文通过春季华北地区大风、降温、强寒潮过程中能量场的滤波分析,研究了滤波处理后行星尺度系统动能变率的中、短期演变特征,及其与寒潮冷空气爆发路径的相关关系,揭示了有效位能各项对寒潮大风、降温、强天气区的预报指示意义。同时,利用热力学第一定律反算了春季寒潮过程中的非绝热热源项,并对其进行滤波分析,给出了寒潮前期和寒潮过程中热源场的分布特征及其与寒潮活动的关系。更多还原

【Abstract】 In this paper, the filter analyses are made on the energy and heat fields in the process of spring cold waves over North China. The characters of the energy and heat distributions on different scales before and during the cold-wave process are given, along with their relationships with the activities of cold waves.更多还原