The Scientific World Journal

Research Article

A Temperature-Based Model for Estimating Monthly Average Daily Global Solar Radiation in China

Table 3

The minimum, maximum, and average values of the statistical indicators for the four models at the 65 stations in China.


Error	Model	Wet region			Semiwet region			Semi-arid region			Arid region			Overall
Error	Model	Min.	Max.	Ave.	Min.	Max.	Ave.	Min.	Max.	Ave.	Min.	Max.	Ave.	Min.	Max.	Ave.

MPE	HS	−0.8776	8.7307	2.5114	−0.2146	0.9753	0.2416	−0.1027	0.5700	0.2023	−0.2488	1.2711	0.1362	−0.8776	8.7307	1.1600
	Samani	−2.6927	3.9379	1.1221	−2.9563	4.3446	0.8382	−5.6928	4.0134	0.0326	−4.8029	3.8377	−0.9011	−5.6928	4.3446	0.5254
	Chen	−0.8200	2.3224	0.8990	0.0623	0.6648	0.2495	0.0623	0.5936	0.2474	0.0757	0.5148	0.2490	−0.8200	2.3224	0.5189
	Equation (4)	−0.4714	1.4145	0.4072	−0.1984	0.7587	0.1067	−0.2414	0.3613	0.1086	−0.4718	0.4250	0.0361	−0.4718	1.4145	0.2199

MBE	HS	−0.2237	0.6223	−0.0024	−0.1528	0.4181	0.1358	−0.0962	0.4891	0.1759	−0.1936	0.4919	0.2205	−0.2237	0.6223	0.0995
	Samani	−0.4043	0.5132	0.0285	−0.4681	0.6410	0.1842	−1.0949	0.6886	0.0646	−0.8158	0.8158	−0.0861	−1.0949	0.8158	0.0536
	Chen	−0.2592	0.5091	−0.0316	−0.1040	0.4187	0.1107	−0.0409	0.3427	0.1378	−0.0711	0.4193	0.1431	−0.2592	0.5091	0.0617
	Equation (4)	−0.0536	0.1681	0.0511	−0.0710	0.0747	0.0184	−0.0659	0.0934	0.0159	−0.0867	0.0919	0.0201	−0.0867	0.1681	0.0318

RMSE	HS	0.6398	2.3068	1.4972	0.3878	1.2721	0.7589	0.3489	1.3869	0.7508	0.5161	1.3956	0.9760	0.3489	2.3068	1.1009
	Samani	0.5503	1.8496	1.0371	0.2622	1.1235	0.7129	0.3624	1.2429	0.8792	0.3661	1.2611	0.9003	0.2622	1.8496	0.9074
	Chen	0.5085	1.9254	1.1351	0.2976	1.2655	0.6849	0.3005	1.2403	0.7090	0.3962	1.4056	0.8036	0.2976	1.9254	0.8961
	Equation (4)	0.2688	1.1429	0.6579	0.2356	0.8538	0.4382	0.1524	0.8140	0.4234	0.2301	0.8039	0.5204	0.1524	1.1429	0.5408

NSE	HS	0.2311	0.9837	0.7651	0.7575	0.9931	0.9540	0.9284	0.9960	0.9715	0.9297	0.9933	0.9656	0.2311	0.9960	0.8805
	Samani	0.5717	0.9818	0.8872	0.8169	0.9957	0.9616	0.8644	0.9969	0.9582	0.9424	0.9966	0.9690	0.5717	0.9969	0.9314
	Chen	0.5730	0.9817	0.8708	0.7962	0.9945	0.9616	0.9288	0.9968	0.9740	0.9470	0.9960	0.9761	0.5730	0.9968	0.9284
	Equation (4)	0.8324	0.9930	0.9534	0.8908	0.9975	0.9821	0.9418	0.9988	0.9889	0.9768	0.9987	0.9887	0.8324	0.9988	0.9724