2020年梅雨季节镇江市空气污染变化及原因分析

Analysis of Air Pollution Changes and Causes in Zhenjiang City during the Rainy Season in 2020

2020年梅雨期较往年持续时间长、累计雨量大、影响范围广。为了解梅雨季节恶劣气象条件下镇江市区大气环境污染来源和成分,通过2020年梅雨季节典型自动站监测数据和镇江市区近三年大气空气质量逐月数据,分析了特殊梅雨季节(6月)镇江市空气污染变化情况及影响因素。结果表明:(1)梅雨期间颗粒物浓度未见明显变化;(2)O3污染仍是影响近期空气质量的主要因素,在高温天气时,臭氧容易超标;(3)VOCs对臭氧污染的影响较明显,整个梅雨季节镇江市基本处于VOCs控制区以及VOCs和NOx协同控制区。

The rainy season in 2020 lasts longer than previous years,has more accumulated rainfall and a wider range of influence.In order to understand the source and composition of air pollution in Zhenjiang urban area under severe weather conditions during the rainy season,based on the monitoring data of typical automatic stations during the rainy season in 2020 and the monthly data of atmospheric air quality in Zhenjiang City in the past three years,this paper analyzed the air pollution changes and influencing factors in Zhenjiang City during the special rainy season(June).The results showed that:(1)The concentration of particulate matter did not change significantly during the rainy season period;(2)O3 pollution is still the main factor affecting air quality in the near future.In high temperature weather,ozone is likely to exceed the standard;(3)VOCs have a significant impact on ozone pollution,Zhenjiang City is basically in the VOCs control area and the VOCs and NOx coordinated control area throughout the rainy season.