Abstract
Using hourly data to study the impact of precipitation on air pollutants and AQI in 2018 spring and summer in Lanzhou. The results show that precipitation has different scavenging capacity for air pollutants. The sorting capacity of precipitation for different pollutants is: SO2> PM10> NO2> O3> PM2.5> CO. Different levels of precipitation scavenging capacity is also different, heavy rain and micro rain had the best effect on PM10 removal, moderate rain and micro rain had better wet scavenging capacity for O3. Precipitation duration and precipitation are the key factors of pollutant removal capacity.
Highlights
Meteorological conditions will have a greater impact on air quality[1-3], one of the main factors is precipitation
Previous studies[4-10] have shown that precipitation has a certain scavenging effect on air pollutants
In the first half of 2012, air quality index (AQI) will be used to replace the original air pollution index (API), and the pollutants involved in the evaluation will be increased to SO2, NO2, PM10, PM2.5, O3, CO
Summary
Meteorological conditions will have a greater impact on air quality[1-3], one of the main factors is precipitation. Previous studies[4-10] have shown that precipitation has a certain scavenging effect on air pollutants. Due to the limitation of early data, most studies use daily data for analysis, and the pollutants analyzed are mainly PM10, SO2, NO2 and API. In the first half of 2012, air quality index (AQI) will be used to replace the original air pollution index (API), and the pollutants involved in the evaluation will be increased to SO2, NO2, PM10, PM2.5, O3, CO. Precipitation is less, so its precipitation scavenging effect must be different from that of more rain water in southern China[12,13]. Precipitation, air pollutants and AQI in Lanzhou in spring and summer of 2018 were taken as the research objects to analyze the effect of precipitation on the removal of air pollutants in this area
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