Microphysical processes under different hourly rainfall intensities in super typhoon Rammasun

High-resolution numerical simulation data of super typhoon Rammasun simulated by the Weather Research and Forecasting (WRF) Model was used to study cloud microphysical processes under different hourly rainfall intensities. The grid points in gale circle were categorized into four types (0–5, 5–20, 20–50, 50- mm) based on rainfall. precipitation characteristics investigated diagnostic statistical methods. results showed that eve first landfall, extremely heavy (50- mm type) significantly enhanced compared other types. vertical movement reduced middle lower troposphere which very conducive relative interaction hydrometeors with enhancement collision processes. 5–20 20–50 both mostly accounted for about 40% total circle, while 0–5 generally smaller than former two. As intensity increased, absolute conversion rates all major had shown increasing trends, especially non-uniformity C nd (the condensation water vapor water), P racw accretion rain) D gacw graupel). contribution gmlt melting graupel) increased slightly then decreased from type (36.28%) (25.06%), (41.77%) (50.97%), related upward motion characteristics.