Table 2 Mean and PC1 results of RSEI in Shanxi Province (2000–2020).

Year	RSEI	kNDVI	WET	LST	NDBSI	PC1(%)
2000	0.42	0.60	0.59	0.35	0.57	78.33%
2001	0.43	0.54	0.60	0.44	0.58	83.13%
2002	0.52	0.62	0.48	0.45	0.54	77.65%
2003	0.46	0.63	0.52	0.45	0.58	76.55%
2004	0.51	0.63	0.58	0.40	0.56	71.03%
2005	0.46	0.60	0.56	0.44	0.58	80.48%
2006	0.50	0.62	0.47	0.40	0.57	77.81%
2007	0.52	0.65	0.46	0.43	0.59	77.67%
2008	0.51	0.66	0.48	0.40	0.57	79.07%
2009	0.49	0.61	0.50	0.47	0.60	78.69%
2010	0.49	0.64	0.47	0.41	0.59	80.16%
2011	0.51	0.64	0.45	0.44	0.56	77.17%
2012	0.58	0.68	0.46	0.41	0.54	72.87%
2013	0.57	0.72	0.39	0.36	0.52	65.70%
2014	0.55	0.68	0.42	0.40	0.55	76.28%
2015	0.54	0.67	0.47	0.47	0.57	79.19%
2016	0.53	0.73	0.44	0.38	0.54	70.68%
2017	0.56	0.70	0.46	0.43	0.56	77.60%
2018	0.55	0.74	0.49	0.35	0.54	68.71%
2019	0.50	0.68	0.48	0.38	0.58	76.94%
2020	0.58	0.72	0.43	0.42	0.55	72.35%

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