Abstract: Using data gathered by Tropical Rainfall Measuring Mission (TRMM) Satellite in 2000 during the period of Huaihe River Basin Energy and Water Cycle Experiment (HUBEX), a new precipitable cloud model is established. To validate this model, a vector radiative transfer model is used to simulate the upwelling microwave radiation sensed by TRMM Microwave Imager (TMI). The contribution of each component in this cloud model to the total upwelling brightness temperature is discussed. It is concluded that the new precipitable cloud model is reliable and can fit the requirement for further study in relative areas; also it is pointed out that the influence of icy hydrometeors to the upwelling radiation is severe and needs further study.

Key words: precipitable cloud model, radar, microwave radiation, HUBEX

摘要： 利用热带降雨测量计划卫星2000年在淮河流域能量和水循环试验区域的观测资料建立了适合该地区的云雨模型，并用此模型研究了云雨系统中各种成分对星载微波辐射计所接收的辐射亮温的贡献。模拟结果跟微波成像仪(TRMM)的九通道微波辐射亮温进行对比的结果表明：用TRMM卫星资料建立的云雨模型较好的反映了云降水系统的实际辐射情况；同时也看到，降水系统中上部冰层对上行辐射亮温影响巨大，值得进一步研究。

关键词: 云雨模型, 雷达, 微波辐射, 降水