Numerical Analysis of Effects of Atmospheric Ice Nuclei Concentrations on Radiant Properties of Cold Clouds  

作　　者：李娟 毛节泰 胡志晋 游来光 张蔷 

机构地区：[1]National Meteorological Center of China, Beijing 100081 [2]Department of Atmospheric Sciences, Institute of Physics, Peking University, Beijing 100871 [3]Chinese Academy of Meteorological Sciences, Beijing 100081 [4]Beijing Municipal Meteorological Bureau, Beijing 100089

出　　处：《Acta meteorologica Sinica》2005年第1期102-111,共10页

基　　金：This work is supported by the project of National Meteorological Center "Improvement and Development of Global Medium-Range Numerical Forecast system".

摘　　要：Numerical simulations of 18 precipitation days from June to September in 1996with the 3D convective cloud model of CAMS (Chinese Academy of Meteorological Sciences, Version2000) were conducted. In these simulations, the concentration of IN (ice nuclei) was assumed toincrease by 5 times. The results show that when IN concentrations increase, the amounts ofprecipitation decrease, cloud tops heighten and the areas of cloud tops increase in 80 percentsimulated clouds. Moreover, in 95 percent simulated clouds, the sizes of ice crystals in cloudsdecrease and quantities increase. These results mean that the physical properties of clouds willchange when IN concentration increases. The radiant properties of clouds and climate may also changedirectly and indirectly.Numerical simulations of 18 precipitation days from June to September in 1996with the 3D convective cloud model of CAMS (Chinese Academy of Meteorological Sciences, Version2000) were conducted. In these simulations, the concentration of IN (ice nuclei) was assumed toincrease by 5 times. The results show that when IN concentrations increase, the amounts ofprecipitation decrease, cloud tops heighten and the areas of cloud tops increase in 80 percentsimulated clouds. Moreover, in 95 percent simulated clouds, the sizes of ice crystals in cloudsdecrease and quantities increase. These results mean that the physical properties of clouds willchange when IN concentration increases. The radiant properties of clouds and climate may also changedirectly and indirectly.

关 键 词：ice nuclei OBSERVATION numerical simulations CLIMATE radiation 

分 类 号：P426.51[天文地球—大气科学及气象学]