*4.2. Results of Spatial Autocorrelation Experiment*

In this experiment, Moran scatter plot and the LISA plot were used to analyze and study the spatial relationship of haze in different seasons. Then, the total spatial autocorrelation during the period was analyzed. The global Moran's *I* result are shown in Table 4:

**Table 4.** Global Moran Index Table.


The Moran's *I* of the haze of Beijing in winter, spring, summer, and autumn is 0.071, 0.052, 0.375, and 0.349. It shows that the haze concentration in the four seasons is positively correlated with the geographical area. This relationship is the strongest in summer and autumn, indicating that the spatial correlation in these two seasons is more prominent. Moran's *I* in winter and spring is very close to zero, indicating that the haze randomly occurs in nine blocks in these two seasons, while in summer and autumn, the haze has the characteristics of regional accumulation.
