萍乡市大气污染PM_(2.5)时空分布规律

Spatial and Temporal Distribution of PM_(2.5) in Pingxiang City

利用2017年萍乡市4个空气子站逐日逐次数据,统计分析了萍乡市大气污染物PM_(2.5)浓度时空分布规律、PM_(2.5)与PM_(10)的相互关系及其变化趋势,数据统计结果显示,萍乡市PM_(2.5)浓度超二类标准,四季中冬天污染最大,春秋次之,夏季最小,污染最大的地区分布在中心城区市政府车库;PM_(2.5)与PM_(10)比值平均为0.60,与污染月均浓度变化趋势相似,呈U型分布。

Based on the daily data of four air sub-stations in Pingxiang City in 2017,the temporal and spatial distribution of PM2.5 concentration,as well as the relationship between PM2.5 and PM10 and their changing trend were analyzed.The statistical results showed that the PM2.5 concentration in Pingxiang City exceeded the second-class standard.In the four seasons,the winter pollution appeared the most serious,followed by spring,autumn and summer respectively.As to the area distribution of pollution,the government garage in the central urban area was most seriously polluted,the average ratio of PM2.5 to PM10 reaching 0.60,which is similar to the trend of monthly average concentration of pollution,showing a U-shaped distribution.