沙尘气溶胶对福建沿海城市空气质量的影响  

Impact Analysis of Dust Aerosols on Air Quality in Fujian Coastal Cities

作　　者：余永江[1] 王宏[1] 林长城[1] 冯宏芳 

机构地区：[1]福建省气象科学研究所,福州350001 [2]福建省漳州市气象局,漳州363000

出　　处：《气象科技》2013年第4期748-752,共5页Meteorological Science and Technology

基　　金：环保公益性行业科研专项(201009004)资助

摘　　要：利用2005—2009年沙尘天气资料、空气污染指数及后向轨迹模型分析了沙尘气溶胶影响期间福建沿海城市的空气质量。结果表明:沙尘影响日数总体上和沙尘天气过程的次数有关,2006和2007年的沙尘影响日较多。沙尘影响日呈单峰型分布,高值区出现在春季(3—6月)。沙尘影响期间的空气污染指数较高,年平均API接近或超过轻度污染级别,能见度和PM10浓度之间呈反相关。沙尘气溶胶气团主要通过西北和偏北路径运动至福建沿海城市,其中300m高度的气团有11次经西北路径运动至福建沿海(占50%),有10次经偏北路径运动至福建沿海(占45%);800m高度的气团有12次经西北路径运动至福建沿海(占57%),5次经偏北路径运动至福建沿海(占24%)。Based on the sand-dust weather data and air pollution index from 2005 to 2009, the air quality characteristics of Fujian coastal cities influenced by dust aerosols are analyzed. The air mass backward trajectory simulation method is employed to analyze the dust aerosol sources and transport paths. The results show that the number of days in which air PM10 concentration was influenced by dust aerosols was determined the number of dust events mainly, and the numbers of days influenced by dust in 2006 and 2007 are relatively larger. The monthly change of the number of days influenced by dust aerosol presented a typical single peak, larger between March and June. The air pollution index was higher during the dust aerosol period, and the mean API often exceeded the mild pollution degree. Visibility was positively correlated to PM10 during the dust aerosol period. There are three transportation paths： north, west, and northwest. The dust air masses moved toward Fujian coastal cities by the northwest path and north path mainly, with 11 times through the northwest path （50%） and 10 times through the north path （45%） at 300 m and 12 times through the northwest path （57%） and 5 times through the north path （24%） at 800 m altitude.

关 键 词：沙尘气溶胶 空气污染指数 福建沿海城市 

分 类 号：X513[环境科学与工程—环境工程]