Abstract: In this paper, we evaluate the fitness of WRF physics schemes when simulate weather in Bayanbulak basin of the Tianshan Mountain area in Xinjiang, and seek the best performance one. So we use WRF to simulate two heavy precipitations in this area. We choose two cloud and convective parameterization schemes(Grell-Freitas,Grell-3), two boundary layer parameterization schemes(YSU,MYJ), three cloud microphysical parameterization schemes(Lin,WSM6,Thompson), three combination schemes of short and long radiation(New Goddard/New Goddard,Dudhia/RRTM,GFDL/GFDL). Based on these, we form 36 different combination schemes, and adopt double nested manner in WRF to simulate experimental area. Meanwhile, by using meteorological observational data of automatic weather station, we analyze hourly rainfall, 10 m wind speed, surface atmospheric pressure, atmospheric temperature and characteristics of boundary layer structure. Finally, we evaluate the difference among parameterization schemes and get the most stable ensemble parameterization schemes are YSU, Grell-Freitas, WSM6 and Duhia/RRTM. But even the best performance, one also have some gap to the observation.

Key words: WRF model, parameterization scheme, heavy rainfall, numerical simulation, Bayanbuluk Basin, Xinjiang