梅雨静止锋积云群整体属性的诊断研究

本文利用积云群整体诊断模式，对一次梅雨静止锋暴雨过程的积云对流活动进行研究，计算了质量通量、云内温度、比湿、液态水等积云属性，讨论了云中凝结蒸发过程以及对流能量输送特征。结果表明，梅雨积云质量通量比热带扰动大，但积云的发展高度不及热带深厚对流；积云群的降水效率约为50％；潜热在对流能量铅直输送中占显著地位，其量值远大于热带扰动中的对流活动。

Diagnostic Study of Bulk Properties of the Cumulus Ensembles inside Meiyu Quasi-stationary Front

A one-dimensional steady state cumulus cloud model, by considering both cumulus uporaft anddowndraft, has been applied to diagnose the bulk properties inside the cumulus cloud clusters of theMeiyu quasi-stationary front. The vertical structures of several characteristic values of cumulus clouds,e.g. cumulus mass flux, temperature excess, water vapor mixing ratio excess and liquid wate contenthave been studied. The condensation and evaporation processes ofcumulus clusters and the processes ofvertical transports on energies are also discussed. Results show that although the mass flux of ti ie Meiyufront cumulus cloud is larger than that of the tropical deep convective cumulus cloud, but the cumulusclouds of the Meiyu front can only reach a height much lower than the tropical clouds. The 1 frecipitation efficiency in Meiyu front cumulus clouds is about 50%. The vertical flux of latent heat d )minatesthe total energy vertical flux. Its magnitude is greater than that of the tropical disturbance.