Evaluation of Three Gridded Precipitation Products to Quantify Water Inputs over Complex Mountainous Terrain of Western China

This study evaluates the capacity of three gridded precipitation products (MSWEP V2.2, TRMM-3B42 V7, and GPM-IMERG V6) to detect in Min Jiang watershed, a data-scarce mountainous region western China. A set statistical contingency indices is calculated for compared with rain gauge observations at 23 ground stations from July 2000 May 2016. Consistency between datasets examined different temporal (i.e., daily, monthly, seasonally, annually) spatial site level, sub-regional watershed level) resolutions. We identify possible reasons discrepancies among datasets. Our results indicate that: (1) MSWEP product best suited long-term mesoscale rainfall, rather than short-term light or extreme rainfall; (2) IMERG represents stable performance simulation rainfall variability detection capability; (3) Composition datasets, climatic systems, regional topography are key factors influencing consistency Therefore, we suggest using V2.2 V6 as potential data sources hydrometeorological studies over watershed. The findings this inform future climate applications regions complex terrain.