Table 3. LST normalization results for the study area in 2015 and 2019.

Temperature grade	Normalized temperature index	2015		2019
		LST /°C	Percentage	LST /°C	Percentage
Low temperature zone	0.0–0.2	19.16–23.78	18.19%	16.29–20.65	19.31%
Low-middle temperature zone	0.2–0.4	23.78–28.41	70.53%	20.65–25.01	72.21%
Middle temperature zone	0.4–0.6	28.41–33.04	10.34%	25.01–29.37	7.79%
Middle-high temperature zone	0.6–0.8	33.04–37.66	0.90%	29.37–33.72	0.66%
High temperature zone	0.8–1.0	37.66–42.29	0.04%	33.72–38.08	0.03%
Total	0.0–1.0	19.16–42.29	100.00%	16.29–38.08	100.00%