珠三角地区2015年2月一次重污染天气污染物的时空分布特征

Characteristics Analysis of Temporal and Spatial Distributions of Air Pollutants in PRD:A Case Study

利用广东省环保、气象监测数据，对珠三角地区春季一次重污染天气过程中污染物浓度的变化特征、空间分布及其相互影响进行了分析，结果表明：该次过程中珠三角主要城市的AQI日均值最高超过150、东莞和深圳超过了200，空气质量达到了中度到重度污染等级；AQI首先从珠三角西侧开始升高，逐渐扩散为全区域性的污染天气；该次污染过程以气溶胶污染为主，PM2.5，和PM10超标率分别达到了0．990和0．993；PM2.5，占PM10比例的日均值在52％-79％之间，细粒子污染特征明显，细粒子对能见度的影响很大。

Extreme air pollution weather, which can influent the economic and social development and human health considerably, attracted increasing attentions in recent years. In this research, environmental and meteorological data are used to analyze the variations and spatial distributions of air pollutant concentrations and interrelationship of pollutants in a severe air pollution process in spring in Pearl River Delta （PRD） region. Results show that the maximum diurnal air quality index （AQI） in main cities in PRD region gets higher than 150 and overpasses 200 in Dongguan and Shenzhen, which means the air quality levels in PRD reach moderate to heavy pollution levels. AQI in the east of PRD begins to rise firstly, then the whole region drops into high air pollution state. Aerosol pollution dominates the whole air pollution progress. The probability for over-the-standard PM2.5 and PM10 pollution to appear reaches 0.990 and 0. 993, respectively. The diurnal values of the proportion of PM2.5 in PM10 vary between 52% and 79%. Fine particulates dominate in the pollution progress and affect the visibility dramatically.