Ilyas M, Abdul Aziz D, Tajuddin M R
School of Physics, University of Science of Malaysia, Penang.
Int J Dermatol. 1988 Jun;27(5):315-8. doi: 10.1111/j.1365-4362.1988.tb02360.x.
Results from a 6-year study of solar ultraviolet A (UVA) radiation measurements at the equatorial location of Penang (5 degrees N) are presented. On clear days, the diurnal flux reaches a very high dosage of about 3.0 x 10(-2) KWHM-2 around midday. The average daily total flux is in the range of 1.6 x 10(-1) KWHM-2 and does not change much seasonally. The high 83% cloud cover only reduces the incoming flux to about half. The radiation flux represents a lower limit of the incident UVA radiation applicable to much of the equatorial/tropical region.
本文展示了在槟城赤道地区（北纬5度）进行的为期6年的太阳紫外线A（UVA）辐射测量结果。在晴天，中午时分的日通量达到非常高的剂量，约为3.0×10⁻²千瓦时·米⁻²。日平均总通量在1.6×10⁻¹千瓦时·米⁻²范围内，且季节性变化不大。83%的高云覆盖率仅使入射通量降低至约一半。该辐射通量代表了适用于赤道/热带大部分地区的入射UVA辐射的下限。
