大气颗粒物时空分布特征及影响因素

目的研究城市空气污染现状以应对日益严重的城市空气污染问题．方法以某市为研究区域，市城区以及邻县的大气颗粒物为研究对象，分别于采暖季、风沙季、非采暖季每个季度连续6天对TSP、PM小PM2.5，样品进行有效同步采集，对该市大气颗粒物质量浓度的时空分布特征和影响因素进行了分析．结果该市空气大气颗粒物污染以PM2.5，的污染最为严重，PM2.5,最大超标倍数为3．6倍．结论该市大气颗粒物的平均质量浓度变化特征为采暖李质量浓度〉风沙季质量浓度〉非采暖季质量浓度，TSP、PM10和PM2.5，质量浓度与风速呈现负相关性，PM10和PM2.5质量浓度与湿度呈现正相关性，TSP质量浓度与湿度呈现负相关性，能见度与三个粒径的颗粒物浓度均呈现负相关性．

Study on the Temporal and Spatial Characteristics of Atmospheric Particulates and the Factors

This paper studies the pollution of urban air current situation in order to deal with the growing problem of urban air pollution. With a city as the research area and the atmospheric particulates of the city and neighboring counties as research object, TSP, PM10 and PM2.5 were effectively and synchronously col- lected in continuous 6 - days of heating season, sand season and non - heating season. The temporal and spa- tial characteristics of mass concentration of atmospheric particulates and the influencing factors in this city were analyzed. The result is that PMz 5 pollution is the most serious. The biggest exceeded criterion multiple is 3.6 multiples. The average mass concentration variation of atmospheric particulates is：Heating season 〉 Sand season 〉 Non - heating season. The mass concentration of TSP, PM~0 and PMz 5 and wind velocity are negatively correlated. The mass concentration of PM10 and PMz s and humidity are positive correlated. The mass concentration of TSP and humidity are negatively correlated. The mass concentration of TSP,PM~0 and PM2. 5 and visibility are negatively correlated.