合肥市PM_(2.5)污染特征及影响因素分析研究

Analysis of Pollution Characteristics and Influencing Factors of PM_(2.5) in Hefei

通过对合肥市2013年和2014年PM2.5浓度变化与时间、气象条件、地域维度的关系的研究,对PM2.5的影响因素进行了分析。结果表明,夏季PM2.5平均浓度最低,冬季最高。在一天中的PM2.5的浓度变化呈双峰分布,两个峰值分别出现在上午8、9时和晚上的9点左右。一天中在下午2、3点时PM2.5的浓度最低。PM2.5的主要影响因素为当地的气象条件因素和污染源的排放情况,其中气象条件为主要原因,污染源排放为根本原因。

This paper studies the relationship between PM2. 5concentration and time,meteorological condition and regional dimensions in Hefei during 2013 and 2014. The results show that the lowest average concentrations of PM2. 5appears in summer and the highest in winter. Daily PM2. 5concentration distribution is bimodal,two peak appeared at 8： 00 and 9： 00 in the morning and21： 00 in the evening respectively. The lowest PM2. 5concentration appeared in 14： 00 and 15： 00. PM2. 5main influence factors for the local meteorological conditions and pollution sources of emissions,including meteorological conditions as the main reason,pollution emissions for root cause.