Research on the Variation Law of Atmospheric Nitrogen Dioxide Concentration in Hunan Province and Its Correlation With Various Basic Pollutants
Using automatic environmental air monitoring data and related data processing software in Hunan Prov-ince,statistical analysis was conducted on data from 14 cities from 2015 to 2018.The distribution characteristics and basic patterns of nitrogen dioxide concentration changes in the ambient air are analyzed,and the correlation with other pollutants is explored.The results show that the spatial distribution of nitrogen dioxide concentration during this period shows a gradient distribution trend,and is strongly positively correlated with pollutants such as sulfur dioxide,carbon monoxide,and particulate matter;The annual evaluation concentration of nitrogen dioxide did not show a significant consistent trend of change between years,and the overall trend of monthly average con-centration was basically consistent;The number of days when the daily average concentration of nitrogen dioxide exceeds the standard in each city shows a decreasing trend year by year,and the hourly average concentration within the day shows a"bimodal"pattern of change.The trend of daily average value change is relatively consist-ent with that of sulfur dioxide,but there is no obvious correlation with the daily average change trend of the other five pollutants.
NETL
NSTL
万方数据
