Abstract: Through the analysis of 11 typical mesoscale convective systems occurring at China continent and adjacent ocean on June, July and August, 1998, it is found that 10.65GHz_ V channel and 19.35GHz_ V channel can well response to the absorbability and emission of liquid water in cloud and precipitation, and that 85.5GHz_ V channel and 37.00GHz_ V channel can response to the ice scatting in cloud well. Based on these characters of MCS, the relationship between 85.50GHz polarization-corrected temperatures (T_PC) and lightening is further discussed. The results show that large events density occurred within the contour of 220K, and that during 220--260K, the events density is sharply reduced. At T_PC higher than 260K, there is almost no events observed.

Key words: mesoscale convective system, geostationary satellite, tropical rainfall measuring mission, lightening

摘要： 通过对 1998 年 6—8 三个月内发生在我国大陆和邻近洋面上的 11 个中尺度对流系统的分析，发现 10.65 和 19.35GHz 垂直通道能较好的反应云中液态水和降水的吸收和发射；85.5 和 37.0GHz 垂直通道能较好的反应云中冰晶冰粒的散射。在此基础上，进一步探讨了 85.5GHz 极化订正温度（PCT）和闪电的关系。结果表明闪电密度大的地方发生在 PCT<220K 以下的等值线内；在 220～260K，闪电密度锐减；在 260K 以上，几乎观察不到闪电现象。

关键词: 中尺度对流系统, 地球静止卫星, 热带测雨卫星, 闪电