A preliminary study on the simulation differences of a summer precipitation process by different microphysics schemes of WRF model in Qinghai Plateau
In order to understand the influence of different microphysical schemes on summer precipitation process simulation in Qinghai Plateau,by using the WRF model and NCEP reanalysis data,three microphysical process parameterization schemes,including Lin scheme,WSM6 scheme and New Thompson scheme,were selected to simulate a typical precipitation process in the summer of 2017 in Qinghai Plateau,and the simulation results were discussed based on the observation data of radiosonde and precipitation.Results show that:three microphysical parameterization schemes of WRF model show good consistency to the simulation of temperature profiles,and are close to the real situation.However,there are obviously different in the simulation ability of relative humidity profiles in different regions;the three microphysical parameterization schemes can simulate the main trend,rain belt and heavy rainfall center of the precipitation,but the location of simulated rain belt and heavy precipitation center is more east than the real situation and the local rainfall is larger;the simulated precipitation spatial distribution of WSM6 scheme is the closest to the real data,and the simulated precipitation deviation of the WSM6 and New Thompson schemes is slightly smaller than that of the Lin scheme;the TS score of light rain was the highest,followed by moderate rain,and the reliability of heavy rain simulation was poor;the New Thompson scheme has the highest TS score(0.60)in light rain simulation,followed by WSM6 scheme and Lin scheme(0.43);the WSM6 scheme is better than the other two schemes for medium precipitation simulation;New Thompson scheme and WSM6 scheme are superior to Lin scheme on the whole.
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