中文摘要：

利用热带测雨卫星上测雨雷达的探测结果,考察了青藏高原与东亚及热带地区降水廓线的异同.结果表明高原深厚弱对流降水为高原上最主要的降水类型,占降水总样本近90%,而对总降水量的贡献超过70%,其雨顶高度接近海拔13 km,最大降水率出现在近地面.高原与陆面（非高原地区）及洋面的降水廓线差异主要表现在：①高原上缺少陆面和洋面上的层云降水;②高原深厚对流降水云团在垂直方向上只有2层,难以从平均廓线中辨认深厚降水云团中的冰水混合层和冰晶过冷水层;③高原深厚强对流降水在垂直方向的厚度受到了＂压缩＂,平均最大厚度约10 km,显著小于陆面及洋面地区的平均厚度;④高原深厚弱对流降水平均廓线斜率大于其他地区对流降水平均廓线斜率,表明8 km以上的降水率垂直变率大,由此将释放出更多的潜热,造成显著高于周边地区的对中高层大气的加热.

英文摘要：

Based on measurements derived from tropical rainfall measuring mission （TRMM） precipitation radar （PR）, the vertical profiles of precipitation over the Tibetan Plateau （TP） were examined and compared with those over East Asia and the Tropics. Weak deep convective precipitation was found to be the predominant rain type over TP, which covers the total samples by about 90% and contributes to more than 70% of the total rainfall. It was also shown that the maximum rainrate occurs near the surface of TP and the rain top altitude is near 13 km over sea level Four significant differences between the precipitation profiles over TP and those of other areas are identified： （1） there is no stratiform rain over TP, which could be easily found over other regions; （2） the water-ice mixed layer cannot be separated from ice-supercooled water layer, because only two distinct layers could be identified for the convective rain profile over TP compared to three or four layers over other areas; （3） a vertically compressing effect is placed on the convective rain, resulting in a rain layer depth of about 10 km significantly less than those over East Asia and the Tropics; （4） the slope of profile for weakly deep convective precipitation over TP is much more than that of other areas, which indicates a greater latent heat released at higher levels over TP.