一次辐射雾过程的数值模拟研究  

Numerical Simulation Study on a Radiation Fog

作　　者：宿兴涛[1] 李建云[2] 关皓[1] 

机构地区：[1]中国人民解放军理工大学气象学院,江苏南京211101 [2]成都军区空军气象中心,四川成都610041

出　　处：《气象与减灾研究》2008年第3期28-34,共7页Meteorology and Disaster Reduction Research

基　　金：国家自然科学基金项目(编号:40675040).

摘　　要：利用中尺度模式MM5对2007年10月26日中国东部的一次大雾生消过程进行了数值模拟研究,并对影响辐射雾生消的辐射条件和模式的分辨率做了6组敏感性实验。结果表明,地面的长波辐射冷却是雾形成的决定性因子,太阳短波辐射是雾消散的主要因素;RRTM长波辐射方案模拟效果较云辐射方案更好,适当提高模式水平分辨率对水平尺度很大的雾模拟效果帮助不大,而适当提高模式垂直分辨率模拟则会更准确。The fifth generation NCAR/Peun. State mesoscale model （MMS） was utilized to simulate a dense fog occurred in east China on October 26, 2007. In order to know how the radiation scheme and resolution of the model influenced the formation and dissipation of the radiation fog, six sensitivity tests were performed. The results showed that surface long-wave radiation cooling played a key role in the initiation of a fog; in contrast, solar short-wave radiation played a key role in the dissipation of a fog. And the simulation effect of RRTM long-wave radiation scheme was better than that of cloud radiation scheme. For the simulation of large horizontal scale fog, higher horizontal resolution of the model was not more efficient than the higher vertical resolution of the model.

关 键 词：辐射雾 数值模拟 液态水含量 敏感性试验 

分 类 号：P426.4[天文地球—大气科学及气象学]