Enhancement of UV Radiation by Cloud Effect in NE of Brazil

Table 3

Number of events above clear sky and extraterrestrial model for global solar and UV radiation.

Month	Number of events above extraterrestrial global radiation	Number of events above extraterrestrial UV radiation	Number of events above clear sky global radiation model	Number of events above clear sky UV radiation model
January	28	0	6922	2677
February	20	0	5770	1782
March	25	0	8118	998
April	2	0	5146	1419
May	1	0	3638	535
June	0	0	5238	1710
July	0	0	3783	978
August	0	0	4437	313
September	0	0	4766	443
October	30	0	6129	1087
November	5	0	6948	1559
December	11	0	8009	4092
Total	122 (2.03 h)	0	68,904 (1148.4 h)	17,593 (293.2 h)