Analysis on the air quality of the Yangtze River Delta region based on spatial autocorrelation and geographic detectors

Air quality index analysis is an important means to understand the air quality status in a specific region, which plays an important role in promoting environmental governance, protecting human health and enhancing sustainable development. In this paper, the air quality index of the Yangtze River Delta urban agglomeration was studied spatially and temporally. Firstly, the spatial autocorrelation method was used to analyze the overall and local air quality characteristics of the region, and then the influencing factors of air quality were studied by using geographic detectors. The conclusion shows that the spatial difference of AQI in the Yangtze River Delta is decreasing. Natural factors such as annual average wind speed, average annual temperature and accumulated sunshine have a greater impact on air quality, while human factors such as built-up area and green space area have little explanation power.