中文摘要：

获取武汉市2013年全年10个监测点PM2.5监测数据,采用数理统计方法和GIS空间分析方法分析其时间变化特征和空间分布特征。2013年武汉市城区PM2.5年均值为89.0μg/m3,清洁对照点年均值75.2μg/m3。月变化上,1-7月,浓度逐月下降至7月份达到最低;7-12月,浓度整体上升,10月份浓度上升明显以至11月份有明显回落。日变化上,上午9：00为日间浓度峰值,下午16：00达到低谷;夜间浓度高于日间浓度且夜间变化幅度较小。城区内部污染差异明显,夏季PM2.5浓度空间异质性相对冬季更强;工业区和人口集中区污染最严重,城市绿地和公园局部污染相对较轻;污染程度变化的一致性不仅与距离有关,受周边环境影响更明显。

英文摘要：

Temporal variations and spatial distribution of PM2.5 concentration in Wuhan were analyzed using mathematical statistics method and GIS spatial analysis method with data collected from 10 monitoring sites in Wuhan from January to December, 2013. In 2013, annual average PM2.5 concentration was 89.0 μg/m^3 in urban area and 75.2 μg/m^3 in clean air site located in suburban about 50 km away from city center. As for monthly variation, PM2.5 concentration dropped every month from January to July until at the bottom in July. In the second half year, PM2.5 concentration increased as a whole from July to December, but it increased at a much high level in October and then fell significantly in November. For one day, PM2.5 concentration reached at peak around 9：00 am and bottom around 16：00 pm. Average concentration in the nighttime was higher than in the daytime and it showed much less variation in the nighttime. As for spatial distribution of PM2.5 concentration, there was sharp distinction in urban area, and spatial heterogeneity of PM2.5 concentration in summer is more apparent than in winter. Industrial zones and areas with high population density are the most polluted area while urban green land and parks are less polluted. The consistency of variation of pollutants is not only related to the distance, but affected more obviously by surrounding environment.