A study of the 1999 monsoon rainfall in a mountainous region in central Nepal using TRMM products and rain gauge observations.
A study of the 1999 monsoon rainfall in a mountainous region in central Nepal using TRMM products and rain gauge observations.
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DOI：
10.1029/2000gl011827
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发表时间：
2000-11-15
影响因子：
5.2
通讯作者：
Burbank, DW
中科院分区：
文献类型：
--
作者：
Barros, AP;Joshi, M;Burbank, DW
将1999年季风的雨量计数据与热带降雨测量使命卫星上的降水雷达和微波成像仪得出的降水量进行了比较。这些雨量计是安装在Marsyandi河流域的新水文气象网络的一部分，该流域从青藏高原边缘延伸到恒河流域。与高海拔站点相比，TRMM派生的降水在低海拔站点显示出更好的降雨检测，对于雨率> 0.5 mm/hr.3D PR雨率的Pn产品具有良好的分数，表明中尺度对流系统与海拔1-2 km的陡峭地形之间存在强烈的相互作用，这与在这些位置测量到的非常高的降雨量一致。对雨量计数据的分析表明，即使在海拔4 000米的地方，季风的累积降雨量也相当于印度次大陆记录的最高降雨量。
Raingauge data from the 1999 monsoon were compared with precipitation derived from the precipitation radar (PR) and the microwave imager instruments on board the Tropical Rainfall Measuring Mission (TRMM) satellite. The raingauges are part of a new hydrometeorological network installed in the Marsyandi river basin, which extends from the edge of the Tibetan Plateau to the Gangetic basin. TRMM-derived precipitation showed better detection of rain at low altitude stations as compared with high elevation stations, with good scores for the Pn product for rain rates > 0.5 mm/hr. The 3D PR rain rates suggest strong interaction between mesoscale convective systems and steep terrain at elevations of 1-2 km, which is consistent with the very high rainfall measured at those locations. Analysis of the raingauge data shows that even at altitudes as high as 4,000 m the cumulative monsoon rainfall is comparable to the highest amount recorded in the Indian subcontinent.