Precipitation over the west Tibetan Plateau (TP) was always being accused of lacking observations that limits the precipitation moisture attribution and quantitation over the whole TP. By introducing precipitation from the Tropical Rainfall Measuring Mission (TRMM) and other observation-based data, moisture sources for the whole TP and their variations from 1998 to 2018 are explored using an Eulerian model. It is found that the Southwest subregion from TP to the western Indian Ocean, is the largest moisture contributor. It contributes around 147.6 ± 13.0 mm yr −1 in water-depth of the TP in climatology, accounting for 31.9 ± 1.9% of the annual precipitation. The TP, the West (TP to Europe), and the Southeast (TP to Indochina Peninsula) follow by contributing 23.6 ± 2.3, 21.8 ± 1.5, and 2.6 ± 0.6%, respectively. Circulations dominate the TP in different seasons. Take spring for example, the westerlies prevail over the TP and the West contributes the most moisture, which...

中文翻译：

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利用TRMM评估青藏高原降水的水分源和变化特征。

一直有人指责青藏高原西部的降水缺乏观测值，这些观测值限制了整个TP的降水水分归因和定量。通过引入热带雨量测量任务（TRMM）的降水和其他基于观测的数据，使用欧拉模型探索了整个TP的水源及其在1998年至2018年之间的变化。发现从TP到印度洋西部的西南分区是最大的水分贡献者。它在气候学中对TP的水深贡献约为147.6±13.0 mm yr -1，占年降水量的31.9±1.9％。TP，西部（至欧洲的TP）和东南部（印度支那半岛的TP）分别贡献了23.6±2.3、21.8±1.5和2.6±0.6％。在不同季节中，流通量占主导地位。以春天为例，西风高于TP，而西方贡献最大的水分，这...