生态环境学报2016，Vol.25Issue(2)：266-271,6.DOI:10.16258/j.cnki.1674-5906.2016.02.012
西安市PM2.5时空分布特征及气象成因
Temporal and Spatial Distribution, Meteorological Factors of PM2.5 in Xi’an City
摘要
Abstract
PM2.5 is one of the important air pollutants that is harming human health and the environment, but research on the detailed spatiotemporal characteristics of PM2.5 and meteorological factors are critically lacking. For effective pollution control, daily concentration of PM2.5, primary pollutant date and synchronous meteorological data in Xi’an City of 12 months are collected from September in 2013 to August in 2014 to explore the relationships among them and main meteorological factors that affect PM2.5 concentration. The results show that:(1) PM2.5 is a key factor affecting air quality. (2) Xi’an City is serious polluted and its PM2.5 concentration is above the standard level up to 42.1%, the highest is 606 μg·m-3 on December 24th.The second peak appears on January 31th and PM2.5 concentration is 506μg·m-3. PM2.5 concentration varies seasonally from the peak in winter to the bottom in summer. The monthly variation of PM2.5 shows a “V”shaped distribution. PM2.5 concentration is 192.9 μg·m-3 at its highest in December and is 34.2μg·m-3 at its lowest in July. (3) As a whole, PM2.5 has affected Xi’an City severely over the past years. Among all kinds of reference sites, traffic reference sites are most serious, then resident and industrial reference sites, and the others are all at a good level, the variation of PM2.5 between the sites and the spatial variation of PM2.5 concentration varies with season. (4) PM2.5 concentration is closely related with meteorological factors. The seasonal stepwise regression model between PM2.5 concentration and meteorological factors is established. Its prediction results are corresponded to monitoring results very well.关键词
西安市/PM2.5/时空特征/气象原因Key words
Xi’an City/PM2.5/spatial and temporal characteristics/meteorological factors分类
资源环境引用本文复制引用
李会霞,史兴民..西安市PM2.5时空分布特征及气象成因[J].生态环境学报,2016,25(2):266-271,6.基金项目
国家自然科学基金项目（41271159）；教育部人文社科基金项目（15YJCZH141）；中央高校基本科研业务费专项基金项目 （）
