A Comparison of Models for Estimating Solar Radiation from Sunshine Duration in Croatia

Table 5

Comparison of monthly average daily global horizontal radiation calculated using Soler model with measurements for seven Croatian locations. and are in kWh/m².

Location		Month
		1	2	3	4	5	6	7	8	9	10	11	12
Dubrovnik		1.747	2.420	3.754	5.071	5.987	6.841	7.140	6.664	4.889	3.251	2.025	1.734
		1.673	2.384	3.878	5.078	6.187	7.292	7.457	6.670	4.883	2.718	1.995	1.721
	PE	4.4%	1.5%	-3.2%	-0.1%	-3.2%	-6.2%	-4.2%	-0.1%	0.1%	19.6%	1.5%	0.7%
Gospić		1.159	1.864	3.329	4.590	5.438	6.585	6.727	5.965	4.003	2.408	1.310	1.094
		1.205	1.966	3.202	4.509	5.472	6.695	6.926	6.006	3.867	2.358	1.206	1.083
	PE	-3.8%	-5.2%	4.0%	1.8%	-0.6%	-1.6%	-2.9%	-0.7%	3.5%	2.1%	8.7%	1.0%
Parg		1.126	1.723	3.103	4.336	5.032	6.139	6.097	5.627	3.647	2.202	1.323	1.169
		1.103	1.666	3.005	4.164	4.837	6.011	5.884	5.473	3.470	2.118	1.103	1.126
	PE	2.1%	3.4%	3.3%	4.1%	4.0%	2.1%	3.6%	2.8%	5.1%	4.0%	19.9%	3.9%
Rijeka		1.409	2.127	3.394	4.780	5.483	6.429	6.565	6.195	4.088	2.692	1.499	1.282
		1.216	1.931	3.258	4.520	5.428	6.655	6.771	6.219	4.092	2.618	1.329	1.102
	PE	15.9%	10.1%	4.2%	5.7%	1.0%	-3.4%	-3.1%	-0.4%	-0.1%	2.8%	12.8%	16.3%
Split		1.689	2.366	3.747	5.053	5.952	6.949	7.232	6.584	4.704	3.149	1.870	1.573
		1.592	2.362	3.803	4.979	6.113	7.061	7.362	6.509	4.789	3.127	1.884	1.544
	PE	6.1%	0.2%	-1.5%	1.5%	-2.6%	-1.6%	-1.8%	1.2%	-1.8%	0.7%	-0.7%	1.9%
Zadar		1.509	2.311	3.674	4.991	5.985	7.088	7.270	6.392	4.672	2.966	1.716	1.373
		1.530	2.389	3.883	5.228	6.322	7.425	7.583	6.653	4.709	2.727	1.757	1.368
	PE	-1.4%	-3.3%	-5.4%	-4.5%	-5.3%	-4.5%	-4.1%	-3.9%	-0.8%	8.7%	-2.3%	0.4%
Zagreb		1.045	1.731	3.157	4.520	5.399	6.258	6.157	5.657	3.778	2.288	1.209	0.931
		1.015	1.689	3.078	4.454	5.274	6.170	6.155	5.541	3.587	2.293	1.149	0.909
	PE	3.0%	2.5%	2.6%	1.5%	2.4%	1.4%	0.0%	2.1%	5.3%	-0.2%	5.2%	2.4%