Comparison of Solar UVA and UVB RadiationMeasured in Selangor, Malaysia

摘要

The solar ultraviolet A (UVA) radiation data was measured at Physics Building, Universiti Kebangsaan Malaysia (2°55' N, 101°46' E, 50m asl) by the Xplorer GLX Pasco that connected to UVA Light sensor. The measured solar UVA data were compared with the total daily solar ultraviolet B (UVB) radiation data recorded by the Malaysian Metrological Department at Petaling Jaya, Malaysia (3° 06' N, 101° 39' E, 50m asl) for 18 days in year 2007. The daily total average of UVA radiation received is (298±105) kJm~(-2) while the total daily maximum is (600±56) kJm~(-2). From the analysis, it shows that the values of UVA radiation data were higher than UVB radiation data with the average ratio of 6.41% between 3-14%. A weak positive correlation was found (the correlation coefficient, r, is 0.22). The amount of UVA radiation that reached the earth surface is less dependence on UVB radiation and the factors ere discussed.