Comparison To The Sensitivity Of GRAPES And WRF Model Cloud Microphysical Parameterization Schemes Using CloudSat And MODIS Satellite Data

It is very important for the cloud microphysical process to describe and reveal the physical mechanism of precipitation. In this paper, the content of cloud water and cloud top temperature retrieved from MODIS Satellite and vertical distribution of cloud liquid/ice water retrieved from CloudSat satellite were used as testing and comparison the impact of different cloud microphysical parameterization schemes on macro and micro characteristics of cloud forecasted by GRAPES and WRF models. Results show that:(1) Content of cloud water, cloud top temperature retrieved from MODIS Satellite and ice water content retrieved from CloudSat Satellite can provide an important reference to evaluate the sensitivity of GRAPES and WRF model's cloud microphysical parameterization schemes. (2) the WRF model with non-hydrostatic, double nested domains with the inner most domain of 5 km grid spacing was used to simulate the severe rain over Northeast China, on 19 April 2008 and examined its sensitivity to four different microphysical schemes and tested WRF model data using T639L60 spring simulation results in specific area. (3) A snowstorm process on 09 to 11 November 2009 in North China is simulated by using WRF model with the new double-moment microphysics parameterization scheme(Morrison's). The simulated content of cloud water, cloud top temperature and vertical distribution of cloud ice water and number of ice of the new double-moment microphysics parameterization scheme is the most similar to the result of satellite monitoring, the new scheme shows some improvement of ice water content location and intensity prediction. (4)Three primary ice-nucleation parameterizations are examined in the WRF model via sensitivity tests on a wintertime snowstorm event in the North China.Test3's ice-nucleation parameterizations is Youlaiguang's approximation that formulated based on data obtained Observations in Beijing from 1963. to 1995. The simulated vertical distribution of cloud ice water and number of ice of Test3 are the most similar to the result of satellite monitoring, It is shown that Youlaiguang's approximation is more adaptable in China region.