Numerical Simulation of Influence of Aerosols on Different Cloud Precipitation Types in Beijing Area
Three types of rainfall（rainstorm,moderate rain and slight rain） in Beijing area are simulated using Weather Research and Forecast（WRF3.2） model coupled with Milbrandt-two-moment cloud microphysics scheme,under the continental and maritime aerosol concentration,to explore the influence of aerosols on cloud precipitation.The results indicate that the aerosol increase has various influences on the cloud precipitation：（1） Influencing the ground precipitation.With the increasing of aerosol concentration in Beijing area,48 h total precipitation of the rainstorm and moderate rain are decreased 23% and 16.6%,and 24 h total precipitation of slight rain decreased 14%;（2） Influencing the surface precipitation distribution.The average precipitation of the rainstorm is increased in the most of parts of western Beijing and reduced over 20 mm in the most of parts of eastern Beijing with the increasing of aerosol concentration.The average precipitation of the moderate rainfall decreases 0.1～5 mm in the most of parts of Beijing area. With the increasing of aerosol concentration,the precipitation in western Beijing increase in the slight rainfall process,but eastern,decrease.（3） Influencing the ground precipitation intensity.With the increasing of aerosol concentration the rainfall duration of the rainstorm is prolonged in the high aerosol concentration.An earlier precipitation termination of the moderate rain is found with the increasing of aerosol concentration;（4） Influencing the airborne hydrometeors. The increasing of aerosol concentration causes higher cloud water concentration and lower rain water during the rainstorm and moderate rain processes .
NETL
NSTL
万方数据
维普
