Scientific Reports

Table 3 PCA results.

From: Dynamic monitoring and analysis of factors influencing ecological environment quality in northern Anhui, China, based on the Google Earth Engine

Year	Index	PC1	PC2	PC3	PC4
2001	NDVI	0.565	0.521	0.072	−0.636
	LST	−0.339	0.091	0.928	−0.122
	WET	0.239	−0.845	0.108	−0.467
	NDBSI	−0.713	0.086	−0.348	−0.602
	Eigenvalues	0.034	0.01	0.007	0.001
	Contribution rate	65.4%	19.2%	13.5%	1.9%
2005	NDVI	0.499	−0.779	−0.309	−0.219
	LST	−0.294	−0.179	−0.558	0.755
	WET	0.550	0.601	−0.576	−0.070
	NDBSI	−0.602	−0.010	−0.511	−0.614
	Eigenvalues	0.016	0.006	0.002	0.002
	Contribution rate	61.5%	23.1%	7.7%	7.7%
2010	NDVI	0.408	0.560	0.350	0.630
	LST	−0.234	−0.224	0.931	−0.167
	WET	0.408	−0.796	−0.008	0.447
	NDBSI	−0.783	−0.057	−0.100	0.612
	Eigenvalues	0.019	0.009	0.002	0.001
	Contribution rate	61.3%	29.0%	6.5%	3.2%
2015	NDVI	0.545	0.612	−0.179	−0.545
	LST	−0.304	0.545	0.779	0.051
	WET	0.199	−0.569	0.515	−0.609
	NDBSI	−0.756	0.072	−0.308	−0.574
	Eigenvalues	0.036	0.003	0.002	0.001
	Contribution rate	85.7%	7.1%	4.8%	2.4%
2020	NDVI	0.587	0.650	−0.055	0.479
	LST	−0.336	0.350	0.874	0.037
	WET	0.345	−0.672	0.380	0.534
	NDBSI	−0.651	0.050	−0.299	0.696
	Eigenvalues	0.028	0.006	0.003	0.001
	Contribution rate	73.7%	15.8%	7.9%	2.6%

Back to article page

Search

Advanced search

Quick links