气象因素对大连空气中PM_(2.5)的去除效应分析

根据2013年1月1日至2月15日大连市环境监测中心PM2.5监测数据和大连市气象局风向、风速、降水量等资料,研究了降雪、降雨、风等气象因素对大气中PM2.5的去除效应。结果表明,大连市冬季采暖期PM2.5污染较重,PM2.5浓度受气象因素影响较明显。降雪、降雨、风三种气象因素对大气中PM2.5均有明显的去除效果,因去除机理不同,各气象因素对PM2.5的去除能力大小依次为风、降雨、降雪,去除效率分别为61.6%、46.0%、34.5%。

Removal Efficiency Analysis on PM2.5 Concentration by Meteorological Factors in Dalian

According to the meteorological data of PM2.5 presented by Dalian Environmental Monitoring Centre from January 1st to February 15th, 2013, 4 meteorological factors were considered including wind direction, wind speed, precipitation and snowfall. The results show that the pollutant level of PM2.5 in Dalian is relevant with meteorological factors in Dalian during the winter heating period. The above meteorological data can remove PM2.5 significantly, especially wind, precipitation and snowfall, the removal efficiency of wind, precipitation and snowfall are 61.6%, 46.0%, 34.5% respectively.