参考文献:
[1] 陈德亮, 徐柏青, 姚檀栋等. 青藏高原环境变化科学评估: 过去, 现在与未来[J]. 科学通报, 2015, 60(32): 3025-3035.
     [2] 赵煜飞, 朱江, 许艳. 近50a中国降水格点数据集的建立及质量评估[J]. 气象科学, 2014, 34(4): 414-420.
     [3] Adler, R. F., Huffman, G. J., Chang, A., et al. The version-2 global precipitation climatology project (GPCP) monthly precipitation analysis (1979-present) [J]. Journal of Hydrometeorology, 2003, 4: 1147-1167.
     [4] Dee, D. P., Uppala, S. M., Simmons, A. J., et al. The ERA-Interim reanalysis: configuration and performance of the data assimilation system [J]. Quarterly Journal of the Royal Meteorological Society, 2011, 137: 553-597.
     [5] Sun, B., Wang, H. Moisture sources of semiarid grassland in China using the Lagrangian particle model FLEXPART [J]. Journal of Climate, 2014, 27: 2457-2474.
     [6] Van der Ent, R. J., Savenije, H. H., Schaefli, B., et al. Origin and fate of atmospheric moisture over continents [J]. Water Resources Research, 2010, 46: W09525.
     [7] Xie, P., Arkin, P. A. Global precipitation: A 17-year monthly analysis based on gauge observations, satellite estimates, and numerical model outputs [J]. Bulletin of the American Meteorological Society, 1997, 78: 2539-2558.
     [8] Zhang, C., Tang, Q. H., Chen, D. L. Recent changes in the moisture source of precipitation over the Tibetan Plateau [J]. Journal of Climate, 2017, 30: 1807-1819.