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

Table 4

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

Stations	Evaluation index	AP	OG	Jin	BA	LO	GM	EM	AH	DL	HS	AN	BC
Wuhan
	RMSE	3.141	3.067	3.147	3.016	3.142	3.147	3.142	3.340	3.142	5.141	5.141	4.709
	RRMSE	26.1	25.4	26.1	25.0	26.1	26.1	26.1	27.7	26.1	42.6	42.6	39.1
	NS	0.839	0.846	0.838	0.851	0.839	0.838	0.838	0.818	0.838	0.568	0.568	0.637
	MAE	2.326	2.219	2.333	2.166	2.329	2.333	2.328	2.544	2.329	3.998	3.998	3.380
Changsha
	RMSE	2.062	2.085	2.066	2.018	2.060	2.061	2.062	2.292	2.063	4.874	4.874	4.047
	RRMSE	18.9	19.1	19.0	18.5	18.9	18.9	18.9	21.0	18.9	44.7	44.7	37.1
	NS	0.927	0.926	0.927	0.930	0.928	0.927	0.927	0.910	0.927	0.594	0.594	0.720
	MAE	1.648	1.676	1.651	1.602	1.646	1.648	1.648	1.846	1.649	3.984	3.984	2.903
Zhengzhou
	RMSE	2.246	2.182	2.244	2.069	2.246	2.244	2.245	2.436	2.243	4.180	4.180	3.753
	RRMSE	17.3	16.8	17.3	15.9	17.3	17.3	17.3	18.8	17.3	32.2	32.2	28.9
	NS	0.900	0.906	0.900	0.915	0.900	0.900	0.900	0.882	0.900	0.653	0.653	0.721
	MAE	1.646	1.606	1.644	1.484	1.645	1.644	1.645	1.818	1.643	3.269	3.269	2.780
Average
	RMSE	2.483	2.445	2.486	2.368	2.482	2.484	2.483	2.689	2.483	4.732	4.732	4.170
	RRMSE	20.8	20.5	20.8	19.8	20.8	20.8	20.8	22.5	20.8	39.9	39.9	35.0
	NS	0.889	0.892	0.888	0.899	0.889	0.889	0.889	0.870	0.889	0.605	0.605	0.693
	MAE	1.873	1.833	1.876	1.751	1.873	1.875	1.874	2.069	1.874	3.751	3.751	3.021
	GPI	0.001	0.078	−0.003	0.236	0.002	−0.001	0.001	−0.407	0.002	−4.764	−4.764	−3.485
	Rank	5	2	8	1	3	7	6	9	4	12	11	10