梅雨涡旋与环境场动能的相互作用  

A STUDY OF SCALE INTERACTION FOR KINETIC ENERGY IN THE MEI-YU VORTICITY

作　　者：汪钟兴[1] 刘勇[1] 

机构地区：[1]合肥中国科学技术大学地球和空间科学系,第三世界科学院中国科学技术大学地,合肥球科学和天文学高级研究中心,安徽省气象台

出　　处：《热带气象学报》1996年第1期91-96,共6页Journal of Tropical Meteorology

基　　金：国家自然科学基金

摘　　要：选取１９９１年７月长江中下游地区一次梅雨涡旋暴雨过程，对实测资料用Ｂａｌｅｎｓ尺度分离方法经自适应技术处理后，应用动能相互作用方程组，计算得出发展阶段和成熟阶段涡旋区内对流层高、中、低各层次天气尺度和次天气尺度系统的动能源汇以及相互作用过程，尤其看到两种尺度流场和质量场之间相互作用所制造的动能向两种尺度系统转换，故它是一个促使系统发生发展的能量学标志。Observational data of a selected heavy rain by the Mei-yu vortex in the middle and lower reaches of the Yangtze River in July 1991 are put through a self-adaptive treatment by use of the method of Barens' stale separation. A set of equations for niteractions of kinetic energy is then used to describe the sources (sinks) and interactive processes for synoptic and sub-synoptic stale systems at layers of the troposphere within the area of the vortex in both the developing and maturing stages. The results show that the kinetic energy produced by interaction between wind and mass fields of both scales transforms into the synoptic arid mesoscale systems. It is a sing of energetics for a developing system.

关 键 词：动能收支 梅雨 涡旋 暴雨 环境场 相互作用 

分 类 号：P426.62[天文地球—大气科学及气象学] P432.1