浮尘和重污染天气过程个例分析  

Analysis of a Floating-Dust and Heavy Air Pollution Event

作　　者：朱云凤[1] 刘杰[1] 白雪[1] 王桂臣[1] 

机构地区：[1]江苏省连云港市气象局,连云港222006

出　　处：《气象科技》2016年第5期800-804,810,共6页Meteorological Science and Technology

基　　金：江苏省预报员专项项目(Q201407);连云港市社会发展项目(SH1207和SH1422)资助

摘　　要：利用MICAPS资料、NCEP再分析资料和环境监测站大气成分监测资料,分析2015年3月29日连云港地区一次浮尘及重污染天气过程,结果表明:由于上游地区出现沙尘天气后,空气中大量沙尘粒子随着高空西北气流携带向东南输送,影响连云港,从而形成浮尘天气;高空有西风急流带,400hPa下沉运动加强,高空动量下传是形成浮尘天气的动力条件;连云港处于弱气压场中,大气层结稳定,空气干燥,风力较小,不利于沙尘粒子和污染物扩散;由浮尘的质点后向轨迹模拟得知,沙源来自蒙古国东部地区,与高空形势分析结果一致。Using the MICAPS, NCEP,and the monitoring data of atmospheric composition from environmental monitoring stations,the floating-dust and heavy air pollution process on 29 March 2015 in the Lianyungang area is analyzed.The results show that after the dust weather in the upstream area,a large number of dust particles carried by the northwest air affected the local area,resulted in the floating dust.There were westerlies at the upper levels and increasing sinking motion at 400 hPa,and the high altitude momentum transmission is the dynamic condition for the floating dust.In a weak pressure field,the atmospheric stability and wind are weak,and the air is dry,which are conducive to the spread of dust particles and pollutants.The backward trajectory simulation of dust particles indicates that the sand source is from the eastern region of Mongolia,consistent with the high altitude situation analysis.

关 键 词：浮尘 重污染 后向轨迹 

分 类 号：P458.121.1[天文地球—大气科学及气象学]