Sensitivity experiments of RegCM4 using different cumulus and land surface schemes over the upper reaches of the Yangtze river

For the optimal performance of climate simulation, it is critical to localize physical parameterization schemes models, especially in regions with unique geographic characteristics. To study different for simulation upper reaches Yangtze River Basin (UYRB), we conducted short-term simulations a resolution 50 km from 1990 1993 using RegCM4 driven by ERA-Interim. Simulations 72 scheme combinations were and analyzed identify cumulus convection (CSs) land surface process model. Using multi-standard scoring method, evaluated model precipitation temperature over UYRB schemes. The results show that more sensitive CSs than LSPs. Among selected CSs, Kain-Fritsch can better reproduce characteristics UYRB, wet bias only 0.2 mm/day multi-year average precipitation. Compared community (CLM 3.5 CLM4.5), Biosphere-Atmosphere Transfer Scheme (BATS) performs reproducing an cold 0.2°C all BATS soil moisture, evapotranspiration are lower sensible heat flux higher CLM simulations, which account CLMs simulating warmer temperatures BATS. provide baseline localization RegCM4’s other China.