持续性霾天气与大气边界层气象条件的关系分析  

Relationships between Long Time Haze Weather and Boundary Layer Meteorological Conditions

作　　者：杨雪艳[1] 杜倩[1] 慕秀香[1] 张梦远[1] 

机构地区：[1]吉林省气象台,吉林长春130062

出　　处：《安徽农业科学》2015年第3期240-243,共4页Journal of Anhui Agricultural Sciences

基　　金：中国气象局小型业务建设项目"京津冀;长三角及珠三角环境气象预报预警业务系统建设"

摘　　要：利用地面气象观测资料以及气象探空资料,从环流形势特点、边界层风速、逆温强度、湿度垂直分布特征、混合层高度、通风系数等方面分析了2013年1月11-17日长春市持续霾天气的气象条件。结果发现,此次霾天气发生在高空不断有弱槽扰动、冷空气总体较弱的天气背景下,大气边界层逆温强、风速偏小、湿度大、混合层高度持续〈800 m、边界层通风系数持续〈3 000 m^2/s,致使大气水平扩散能力和垂直交换能力弱,引发了此次持续霾天气。Using the surface meteorological observation data and the sounding data,the meteorological conditions during the long time haze weather in Changchun Jan. 11-17,2013 were analyzed from circulation situation,boundary layer wind speed,intensity of inversion,vertical humidity distribution,the mixed layer height,ventilation coefficient etc. The results indicated that the haze occurred in the condition of weak trough disturbances and weak cold air. Strong boundary layer inversion,low wind speed,high humidity and the mixed layer height lasts for less than 800 meters,the boundary layer ventilation coefficient lasts less than 3 000 m^2/ s,caused weak ability of atmospheric horizontal diffusion and vertical exchange,which lead to the persistent haze weather.

关 键 词：霾 边界层气象条件 逆温强度 混合层高度 通风系数 

分 类 号：S161[农业科学—农业气象学]