Comparative Analysis of Global Solar Radiation Models in Different Regions of China

Table 8

Statistics performances of the 12 models in estimating global solar radiation in Northwest China.

Stations	Evaluation index	AP	OG	Jin	BA	LO	GM	EM	AH	DL	HS	AN	BC
Urumqi
	RMSE	3.319	3.332	3.317	3.327	3.321	3.321	3.318	3.349	3.318	4.999	4.999	4.887
	RRMSE	23.1	23.2	23.1	23.2	23.1	23.2	23.1	23.3	23.1	34.8	34.8	34.1
	NS	0.849	0.848	0.849	0.848	0.849	0.849	0.849	0.846	0.849	0.657	0.657	0.672
	MAE	2.344	2.356	2.342	2.350	2.344	2.346	2.343	2.384	2.343	3.668	3.668	3.619
Xian
	RMSE	2.955	2.915	2.966	2.897	2.973	2.961	2.953	3.106	2.955	4.721	4.721	4.104
	RRMSE	24.2	23.9	24.3	23.7	24.3	24.2	24.2	25.4	24.2	38.6	38.6	33.6
	NS	0.853	0.857	0.852	0.859	0.852	0.853	0.854	0.838	0.853	0.626	0.626	0.717
	MAE	2.172	2.193	2.180	2.155	2.184	2.176	2.171	2.273	2.172	3.681	3.681	2.957
Xining
	RMSE	1.808	1.806	1.807	1.771	1.807	1.809	1.807	1.969	1.807	3.594	3.594	3.233
	RRMSE	11.6	11.5	11.6	11.3	11.6	11.6	11.6	12.6	11.6	23.0	23.0	20.7
	NS	0.932	0.932	0.932	0.935	0.932	0.932	0.932	0.920	0.932	0.732	0.732	0.783
	MAE	1.309	1.320	1.309	1.291	1.309	1.310	1.309	1.414	1.309	2.533	2.533	2.244
Average
	RMSE	2.694	2.684	2.697	2.665	2.700	2.697	2.693	2.808	2.693	4.438	4.438	4.075
	RRMSE	19.6	19.5	19.7	19.4	19.7	19.7	19.6	20.4	19.6	32.2	32.2	29.4
	NS	0.878	0.879	0.878	0.881	0.878	0.878	0.878	0.868	0.878	0.672	0.672	0.724
	MAE	1.942	1.956	1.944	1.932	1.946	1.944	1.941	2.024	1.941	3.294	3.294	2.940
	GPI	0.008	0.013	0.001	0.071	−0.006	0.001	0.010	−0.275	0.009	−4.929	−4.929	−3.787
	Rank	5	2	6	1	8	7	3	9	4	12	11	10