Evaluating diurnal cycle of different satellite precipitation in China

Satellite precipitation plays an important roles in areas sparsely covered by ground stations and has been used in precipitation monitoring and climate research for several years. For this reason, during the last three years, the East Asian Multi-Satellite Integrated Precipitation (EMSIP) system was developed at China Meteorological Administration (CMA) National Meteorological Information Center (NMIC), partially through cooperation with NOAA/CPC. IR TBB data from the FY-2 Geostationary satellite and PMW rain rate retrievals from FY-3B, TRMM, GPM, NOAA-18/19, METOP-A/B, and DMSP-F16/17/18 were integrated to produce high-resolution satellite precipitation estimates over East Asia to make full use of CMA’s geostationary satellites and polar satellites. Then diurnal cycle of EMSIP, CMORPH and GSMAP were evaluated by compared with a dense network of automatic rain gauges over China. The result showed that, all those three satellite precipitation had a lower estimate compare with rain gauge observation; the precipitation diurnal cycle has two peaks over whole china, EMSIP captured those two peaks, but CMORPH and GSMAP only captured the afternoon peak; the RMSE, Bias, and Correlation Coefficient’s diurnal cycle of EMSIP played a stable status; the diurnal cycle had different type over 8 regions of China, those three satellite precipitation can capture the main dinurnal cycle type, but EMSIP can provide more information over Tibetan Plateau.