Evaluation of Three Gridded Precipitation Products in Characterizing Extreme Precipitation over the Hengduan Mountains Region in China

Extreme precipitation events can lead to severe mountain hazards, and they have therefore received widespread attention. The study of extreme be hindered by the insufficient number uneven distribution rain gauge stations, especially in mountainous areas with complex terrain. In this study, daily data three gridded products (Integrated Multi-satellite Retrievals for GPM, IMERG; Multi-Source Weighted-Ensemble Precipitation, MSWEP; Tropical Rainfall Measuring Mission, TRMM) were compared observations at 62 ground stations from 2001 2016 over Hengduan Mountain region China. Deviations between datasets using four heavy rainfall sequences. Various indices used evaluate performance selected products. results show that IMERG TRMM are better than MSWEP characterizing precipitation. accuracy these detecting varied altitude gradient. All provided more accurate estimates higher-altitude lower-altitude areas. Notably, applicable detection subalpine or alpine regions, there still uncertainties capturing characterization low (<1000 m) altitudes region. These should caution future applications when analyzing elevations.