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

Numerical simulations of 18 precipitation days from June to September in 1996 with the 3D convective cloud model of CAMS (Chinese Academy of Meteorological Sciences, Version 2000) were conducted. In these simulations, the concentration of IN (ice nuclei) was assumed to increase by 5 times. The results show that when IN concentrations increase, the amounts of precipitation decrease, cloud tops heighten and the areas of cloud tops increase in 80 percent simulated clouds. Moreover, in 95 percent simulated clouds, the sizes of ice crystals in clouds decrease and quantities increase. These results mean that the physical properties of clouds will change when IN concentration increases. The radiant properties of clouds and climate may also change directly and indirectly.

作 者： LI Juan MAO Jietai HU Zhijin YOU Laiguang ZHANG Qiang   作者單位： LI Juan(National Meteorological Center of China, Beijing 100081)

MAO Jietai(Department of Atmospheric Sciences, Institute of Physics, Peking University, Beijing 100871)

HU Zhijin,YOU Laiguang(Chinese Academy of Meteorological Sciences, Beijing 100081)

ZHANG Qiang(Beijing Municipal Meteorological Bureau, Beijing 100089) 

刊 名： 氣象學報（英文版）  SCI 英文刊名： ACTA METEOROLOGICA SINICA  年，卷(期)： 2005 19(1)  分類號： P4  關鍵詞： ice nuclei   observation   numerical simulations   climate   radiation  

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