Preliminary Study on the Characteristics of Air Pollution in Baoji City From 2015 to 2021
Through analyzing the air quality monitoring data of Baoji City from 2015 to 2021,the results show that over the past seven years,the overall air quality in Baoji City has shown a positive trend.Except for O3,all six major pollutants have shown a downward trend,with SO2 and CO concentrations decreasing the most significantly.Among them,O3 concentration increased by 4.7％;SO2 concentration decreased by 57.3％,and CO concentration decreased by 53.3％.There are significant seasonal differences in pollutant changes,with PM2.5,PM10,SO2,NO2,and CO concentrations being the highest in winter and the lowest in summer,while O3 is the opposite.Over the past seven years,the NO2/SO2 values in Baoji City have increased from 1.63 to 3.41,showing an upward trend year by year.In addition,the pollution load of O3 has been continuously increasing,and composite pollution has gradually become the main type of air pollution in Baoji City.
NETL
NSTL
万方数据
