摘要
利用TRMM卫星探测结果来探讨2010年6月23日发生于湖南一次局地大暴雨的云物理特征。结果表明:(1)强降水系统由一个主降水云团和多个零散降水云团组成,降水系统中对流降水所占面积比层云降水面积小但对总降水量的贡献超过层云降水;(2)可降水冰的丰富区与强的对流上升区域相吻合,云水、云冰对降水产生的影响不大,可降水冰的强度可为降水云提供主要的微波散射信息;(3)可降水与可降水冰之间相变潜热与对流运动的正反馈机制是促进暴雨维持和发展的最重要热力因子。
Based on TRMM satellite data,the cloud physical characteristics of a local rainstorm in Hunan on June 23,2010 are investigated.The results show that（1） heavy precipitation system consists of one major rain cloud cluster and some scattered clouds,among which convective cloud with less area,contributed more to the total rainfall than the stratus cloud systems with more area;（2） the areas with abundant precipitable ice/water were consistent with the strong upward motion areas;（3）the intensity of precipitable ice/water can provide useful microwave scattering information for rainfall analysis,while cloud water/ice doesn＇t show good signature for precipitation;（4） the positive feedback mechanism between the convective motion and the latent heat released by precipitable ice-water phase transition,promotes the maintenance and development of heavy rain.
出处
《广东气象》
2011年第6期4-7,共4页
Guangdong Meteorology
关键词
天气学
典型暴雨
TRMM卫星
水凝物
云物理特征
相变潜热
湖南
synoptics
typical rainstorm
TRMM satellite
hydrometeor
cloud physical characteristics
latent heat
Hunan province
