2010年辽宁一次沙尘天气过程的气象因素及污染特征  

Analysis of meteorological elements and air pollution during a sand dust weather process in 2010 in Liaoning province

作　　者：王扬锋[1] 马雁军[1] 陆忠艳[2] 谷伟 刘宁微[1] 洪也[1] 

机构地区：[1]中国气象局沈阳大气环境研究所,辽宁沈阳110016 [2]沈阳中心气象台,辽宁沈阳110016 [3]辽宁省气象局,辽宁沈阳110016

出　　处：《气象与环境学报》2011年第5期27-31,共5页Journal of Meteorology and Environment

基　　金：中央级公益性科研院所基本科研业务费项目(2011IAE-CMA09);中央级公益性科研院所基本科研业务费项目(2011IAE-CMA08)共同资助;国家自然科学基金(40975084)

摘　　要：利用常规气象观测资料以及环保监测数据,对2010年4月8日辽宁沙尘天气过程的高低空天气形势和主要气象要素进行探讨,并对沈阳地区的空气污染状况进行分析。结果表明:沙尘天气过程主要是受贝加尔湖地区东移冷空气和蒙古低压的共同影响,强大的蒙古气旋造成地面强变压导致地面风速加大,是形成沙尘天气的动力因子;沙尘天气来临前后,风速、能见度和湿度等发生急剧变化;在沙尘天气影响下,沈阳地区的PM10浓度迅速上升,而大风等有利的扩散条件,造成黑碳、气态污染物SO2和NO2浓度出现不同程度的下降。Based on the meteorological observational data from weather stations and monitoring data from environment protection department,the upper and lower weather situation and the main meteorological elements during a sand dust weather event occurred on April 8,2010 in Liaoning province were discussed.The results indicate that this process is influenced by cold air moving to the east in Lake Baike region and Mongolia low pressure.The strong Mongolia cyclone makes strong allobaric gradient and wind speed on ground,which are the dynamic reasons forming sand dust weather.Many meteorological elements such as wind,visibility and humidity change sharply when sand dust weather occurs.PM10 concentration increases quickly in a short time because of the influence of sand dust weather,while the concentrations of black carbon,SO2 and NO2 decline in some extent because of favorable diffusion conditions such as gale in Shenyang.

关 键 词：沙尘天气 气象要素 空气污染 

分 类 号：P445.4[天文地球—大气科学及气象学]