Study on characteristics of spatial and temporal variations of air quality index in Anhui Province
In order to solve the problem of the regional air quality index(AQI)spatial and temporal distribution characteristics of the unknown and the lack of in-depth understanding of the coherence between the main air pollutants,mutation test and wavelet analysis and other methods were used to analyze and study the AQI and the concentration of the six major air pollutants in 16 cities in Anhui Province from 2016 to 2023.This paper showed that,on the time scale,the interannual variation of AQI was in a decreasing trend and there were significant seasonal differences,as well as annual cyclic characteristics;on the spatial distribution,the characteristics of'low in the south and high in the north,and low in the west and high in the east'were presented;and there exist a certain degree of correlation between the AQI and the six pollutants in a specific period of time and within a specific region.The results revealed the temporal and spatial variations of AQI and its correlation with specific pollutants,which could help to understand the factors affecting air quality,facilitate targeted interventions in areas with poor air quality,while the multi-scale characteristics demonstrated in the temporal evolution could also lay the foundation for air quality prediction and the development of effective environmentalmanagement strategies.
air quality indexspatio-temporal variation characteristicswavelet analysiscoherence analysisair pollutants
万方数据
维普
