| With the increase of pollution in Harbin from 2013 and the rapid development of industry in Harbin in recent years,the city's air pollution problem had increased significantly.At the moment,more and more people are beginning to pay attention to the concentration of atmospheric pollutants in air quality.The main analysis of this paper is as follows:This paper selected the monitoring values and monitoring meteorological data of six pollutants such as SO2,NO2,O3,CO,PM10 and PM2.5 collected by 12 ambient air quality monitoring centers in the main urban area of Harbin.Through statistical calculations,we obtained annual,monthly,continuous pollution dates and hourly mean values to analyze the changes of major pollutants and air quality at different time scales.Therefore,it is concluded that Harbin winter pollution period was more and more serious.According to the standard value of the extinction coefficient of the particulate matter for the 3D visible laser radar of less than 3.3 km-1 and the depolarization ratio of0.8,a vertical distribution of the contaminated particles in space can be seen.When the height of the particle concentration distribution was less than 800 m,the extinction coefficient was positively correlated with the particle concentration.The pollution period of the heating period was monitored by laser radar,and SPSS and correlation analysis were used to obtain the relationship between meteorological factors and pollutants and the dispersal and accumulation of pollutants.The correlation coefficient between PM2.5 and PM10 and AQI is 0.945,indicating that it is the primary pollutant affecting ambient air quality.The correlation coefficient between NO2 and wind speed was-0.548,and the correlation was the best.At the same time,the source analysis of the cluster analysis of the backward trajectory was used to burn the straw of the farmer,which provided reasonable suggestions for air quality monitoring and treatment in Harbin. |
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