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北京一次大雾天气边界层结构特征及生消机理观测与数值模拟研究
引用本文:何晖,郭学良,刘建忠,等.北京一次大雾天气边界层结构特征及生消机理观测与数值模拟研究[J].大气科学,2009,33(6):1174-1186.
作者姓名:何晖  郭学良  刘建忠  
作者单位:1.中国科学院大气物理研究所, 北京,100029;北京市人工影响天气办公室, 北京,100089;中科院研究生院, 北京,100049
基金项目:国家"十一五"科技攻关项目2006BAC12B04;公益性行业科研专项GYHY200806001-1 
摘    要:在对2007年10月26日北京大雾天气形势及能见度分析的基础上, 利用12通道微波辐射计、风廓线仪及NOAA极轨卫星监测资料与中尺度数值模拟结果, 比较研究了雾的分布区域、温度、湿度、风速及液态水含量的边界层分布特征。利用中尺度模式模拟结果探讨了此次大雾的维持和形成机理, 具体展现了此次大雾是在稳定大气层结、充沛水汽条件下, 地面长波辐射冷却及雾顶的长波辐射冷却降温形成发展的过程, 而太阳的短波辐射对雾的减弱消散有重要影响。

关 键 词:北京大雾  微波辐射计  数值模拟  垂直结构  机理

Observation and Simulation Study of the Boundary Layer Structure and the Formation, Dispersal Mechanism of a Heavy Fog Event in Beijing Area
HE Hui,GUO Xueliang,LIU Jianzhong and et al.Observation and Simulation Study of the Boundary Layer Structure and the Formation, Dispersal Mechanism of a Heavy Fog Event in Beijing Area[J].Chinese Journal of Atmospheric Sciences,2009,33(6):1174-1186.
Authors:HE Hui  GUO Xueliang  LIU Jianzhong and
Affiliation:1.Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing,100029;Beijing Weather Modification Office, Beijing,100089;Graduate University of Chinese Academy of Sciences, Beijing,1000492.Chinese Academy of Meteorological Sciences, Beijing,100081;Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing,1000293.Beijing Weather Modification Office, Beijing,100089
Abstract:On the basis of Analysis of the synoptic situation and the visibility for the heavy fog event on 26 October 2007 in Beijing area, comparative analysis of the fog area, the boundary layer distribution characteristics of the temperature, humidity, wind speed, and liquid water content (LWC) is conducted with the observation data of the radiometer, wind profiler, satellite, and the simulation results. In addition, the mechanism of the fog formation, maintenance and dispersal is analyzed with the simulation results of a mesoscale model. The results indicate that the long-wave radiation cooling is the important factor of the fog formation in addition to the steady atmospheric stratification and plenty of moisture, while the fog dispersal was most influenced by the shortwave radiation.
Keywords:heavy fog  radiometer  numerical simulation  vertical structure  mechanism
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