合肥紫外线辐射强度与空气质量的关系研究

Relationship Between Surface UV Radiation and Air Quality in Hefei

利用合肥地面紫外辐射及环境空气质量观测资料,分析了晴天状况下9-15时逐时紫外线辐射强度与对应时段的PM10、PM2.5、SO2、NO2、O3、CO这6种污染物浓度及空气质量指数(AQI)之间的关系。结果表明:在PM2.5为首要污染物的情况下,紫外线辐射强度与PM2.5、PM10、AQI存在较好的负相关,与PM2.5的相关系统可达-0.72,而与SO2、NO2、O3、CO的相关性较差;与PM2.5的相关性存在明显的日变化,PM2.5/PM10越大,相关性越好;以PM2.5为首要污染物的重度污染可使紫外辐射衰减32%以上。

Based on the observation data of surface ultraviolet(UV) radiation and air quality collected in Hefei, the relationship between surface UV radiation intensity and the pollutant concentrations of PM10, PM2.5, SO2, NO2, O3, CO, air quality index(AQI) from 9:00 to 15:00 under sunny conditions were analyzed hourly. The results show that when PM2.5was primary pollutant the correlation between UV radiation and PM2.5, PM10, AQI were well compared with SO2, NO2, O3, CO,the correlation coefficient with PM2.5was up to-0.72.The correlation with PM2.5existed a significant diurnal variation, the bigger PM2.5/PM10, the better correlation. Severe pollution weather of PM2.5led the attenuation rate of ultraviolet radiation intensity to more than 32%.