河南省一次大雾的数值模拟及生消机制分析  

Numerical Simulation and Development Mechanism Analysis of Heavy Fog Process in Henan Province

作　　者：王金兰[1] 寿绍文[1] 刘泽军 王新红[1] 田春娜 

机构地区：[1]南京信息工程大学江苏省气象灾害重点实验室,南京210044 [2]广西自治区气象减灾研究所,南宁530022 [3]新乡市气象局,河南新乡453003

出　　处：《气象与环境科学》2008年第1期39-44,共6页Meteorological and Environmental Sciences

基　　金：国家自然科学基金项目(40775033;40405009;40575022;40205008);江苏省自然科学基金项目(BK2005141);江苏省气象灾害重点实验室基金项目(KLME050201)资助

摘　　要：应用非静力平衡中尺度模式MM5及NCEP资料和高空地面资料，模拟分析了2006年1月28日发生在河南省的一次大雾天气过程，结果发现：这次雾体最强的时段在日出后1～2h内，相对湿度下降的拐点滞后于气温回升的拐点2h左右；先出现贴地逆温再出现大雾，逆温最强的时段也是雾体最强的时段，逆温层顶始终覆盖在雾体上方；近地面的微风和风向的转变，有利于雾体的形成和向上发展，风向转变的时间也是雾体形成的时间；增温、减湿和逆温层的破坏是大雾消散的主要原因。This paper presents simulated results of heavy fog process that occurred on January 28, 2007 in Henan province using the non-static equilibrium mesoscale model MM5, the NCEP data, and the upper air and surface data. The results show the period of strongest fog time was behind sunrise 1 - 2 h, and the flex point of relative humidity decline was behind temperature uptrend about 2 h. It was earlier that ground-hugging inversion appeared than heavy fog, and the most inversion was consistent with the strongest fog, and the inversion layer was above the fog; the breeze and the wind shift of surface layer was favorable the heavy fog appearing and growing upwards ; the major reason of heavy fog vanishing was elevated temperature, dehumidification and destroyed inversion layer.

关 键 词：大雾 数值模拟 生消机制 

分 类 号：P458.3[天文地球—大气科学及气象学]