湖北省PM2.5与PM10比值分析及PM2.5时空分布特征研究

基于2012年-2014年湖北省大气污染物监测数据,通过数据反演方法,得到湖北省17个城市的PM2.5年均浓度.利用ArcGIS绘制出各城市不同年份的颗粒物浓度空间分布图,并对其进行分析.结果表明,2012年-2014年间,湖北省17个城市PM2.5与PM10年均浓度比值为0.66,PM2.5年均浓度超出国家二级标准,整体呈现上升趋势.城市方面,在多数城市PM2.5与PM10浓度上升的同时,仅武汉、黄冈和天门3个城市颗粒物浓度2014年较2013年有所下降,且武汉市PM2.5浓度下降率达12.8%,表明武汉市近两年来采取的政策措施具有较好的可行性和有效性.

Analysis on PM2. 5/PM10 Ratio and Spatial and Temporal Distribution Characteristics of PM2. 5 in Hubei

Based on the monitoring data of air pollutants concentration from 2012 to 2014 in Hubei province, this study com-bines the data inversion method to calculate the average annual concentrations of PM2. 5 in the 17 cities of Hubei Province. With ArcGIS, the paper drew spatial distribution map of particulate matter of different cities in 2012~2014, and analyzed the result. It showed that PM2. 5/PM10 in Hubei province was 0. 66;the average annual concentrations of PM2. 5 were generally higher than the 2nd grade standard of the state, and showed an increasing trend during 2012~2014. Considering the cities, while most cities had an increase in the concentration of PM2. 5 and PM10 , only Wuhan, Huanggang and Tianmen had a fall in average annual concentra-tions of PM2. 5 and PM10 in 2014 than in 2013. In addition, the decrease of PM2. 5 concentration in Wuhan had reached 12. 8%, proved the good feasibility and effectiveness of the policy and measures it took in the last two years in Wuhan.