辐射雾生消的数值研究(Ⅰ)——数值模式

A NUMERICAL STUDY ON THE FORMATION AND DISSIPATION OF RADIATION FOG(Ⅰ)——The Numerical Model of Radiation Fog

中文关键词:  辐射雾  数值模式  雾的微物理过程

英文关键词:Radiation fog  Numerical model  Micropliysical processes of fog

中文摘要:

      本文建立了一个描述辐射雾生消过程的数值模式,预报量包括风速、温度、比湿、雾含水量及雾滴浓度等。采用了新的雾微物理过程参数化方法及湍流交换系数公式,构造了考虑水汽、水滴对红外辐射吸收和发射及水滴对短红外辐射散射的辐射参数化计算方案。对具有代表性的实际雾过程模拟,结果表明,模式可行。

英文摘要:

      In this paper, a numerical model is established to study the life cycle of radiation fog.The variables predicted in the model are the wind velocity, the temperature,the specific humidity, the liquid water content and the concentration of fog droplets.New sets of parameterization formulae are adopted for the microphysical processes of fog and the turbulent exchange coefficients. The absorption and the emission of infrared radiation by water vapor and water droplets are considered, also the scattering of near infrared radiation by fog drops.The fog model is used to simulate a representative instance of observed fog process the results show that the model is practicable.