【摘要】 利用三维准弹性中小尺度云模式,对武汉地区1998年7月的一次强降水过程进行了数值模拟,研究了产生强降水云的微物理过程和降水机制,揭示了暴雨云高效率降水的基本原因.结果表明,这次暴雨过程的最大特点是降水持续且降水强度大,云内上升速度的长时间维持和云内较大水凝物含量为特大暴雨的产生提供了条件.这次暴雨过程中,云雨的自动转化碰并过程以及霰的融化致雨过程相对于其它微物理过程更为重要.更多还原

【Abstract】 A threedimensional mesogamma scale qusielastic atmospheric numerical model was used to simulate a heavy rain in Wuhan district in July 1998. Some important characteristics and mechanisms of the microphysical processes were analyzed. Calculations demonstrated the continuity of heavy rain and high precipitation efficiency in the cloud,the results also showed that at the beginning the warmrain process and then the coldrain process was essential for precipitation.更多还原