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

Table 6

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

Stations	Evaluation index	AP	OG	Jin	BA	LO	GM	EM	AH	DL	HS	AN	BC
Guangzhou
	RMSE	2.302	2.266	2.298	2.222	2.235	2.292	2.300	2.498	2.299	4.426	4.426	3.546
	RRMSE	17.8	17.6	17.8	17.2	17.3	17.8	17.8	19.4	17.8	34.3	34.3	27.5
	NS	0.868	0.872	0.868	0.877	0.875	0.869	0.868	0.844	0.868	0.510	0.510	0.686
	MAE	1.926	1.904	1.922	1.870	1.857	1.916	1.924	2.055	1.923	3.759	3.759	2.775
Haikou
	RMSE	2.725	2.669	2.729	2.554	2.727	2.727	2.721	2.951	2.724	5.190	5.190	4.753
	RRMSE	19.0	18.6	19.0	17.8	19.0	19.0	18.9	20.5	19.0	36.1	36.1	33.1
	NS	0.877	0.882	0.877	0.892	0.877	0.877	0.877	0.856	0.877	0.554	0.554	0.626
	MAE	2.173	2.105	2.175	2.007	2.175	2.174	2.170	2.399	2.172	4.249	4.249	3.764
Nanning
	RMSE	2.068	1.963	2.068	1.888	2.068	2.069	2.069	2.355	2.067	4.157	4.157	3.513
	RRMSE	16.7	15.8	16.7	15.2	16.7	16.7	16.7	19.0	16.7	33.5	33.5	28.3
	NS	0.911	0.920	0.911	0.926	0.911	0.911	0.911	0.885	0.911	0.642	0.642	0.744
	MAE	1.624	1.540	1.623	1.451	1.624	1.625	1.625	1.905	1.623	3.466	3.466	2.654
Average
	RMSE	2.365	2.299	2.365	2.222	2.343	2.363	2.363	2.601	2.363	4.591	4.591	3.937
	RRMSE	17.8	17.3	17.8	16.7	17.7	17.8	17.8	19.6	17.8	34.6	34.6	29.6
	NS	0.885	0.891	0.885	0.898	0.888	0.886	0.885	0.862	0.885	0.569	0.569	0.685
	MAE	1.908	1.850	1.907	1.776	1.885	1.905	1.906	2.119	1.906	3.825	3.825	3.064
	GPI	−0.001	0.127	−0.001	0.278	0.035	0.003	0.001	−0.473	0.001	−4.722	−4.722	−3.273
	Rank	8	2	7	1	3	4	6	9	5	12	11	10