Faculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba 4350, Australia.
Centre for Applied Climate Sciences, University of Southern Queensland, Toowoomba 4350, Australia.
Sensors (Basel). 2020 Jul 23;20(15):4105. doi: 10.3390/s20154105.
Solar blue-violet wavelengths (380-455 nm) are at the high energy end of the visible spectrum; referred to as "high energy visible" (). Both chronic and acute exposure to these wavelengths has been often highlighted as a cause for concern with respect to ocular health. The sun is the source of which reaches the Earth's surface either directly or after scattering by the atmosphere and clouds. This research has investigated the effect of clouds on for low solar elevation (solar zenith angles between 60° and 80°), simulating time periods when the opportunity for ocular exposure in global populations with office jobs is high during the early morning and late afternoon. The enhancement of "bluing" of the sky due to the influence of clouds was found to increase significantly with the amount of cloud. A method is presented for calculating irradiance at sub-tropical latitudes from the more commonly measured global solar radiation (300-3000 nm) for all cases when clouds do and do not obscure the sun. The method; when applied to global solar radiation data correlates well with measured within the solar zenith angle range 60° and 80° (R = 0.82; mean bias error (MBE) = -1.62%, mean absolute bias error (MABE) = 10.3% and root mean square error (RMSE) = 14.6%). The technique can be used to develop repeatable hazard evaluations for human ocular health applications.
太阳的蓝紫光波段（380-455nm）位于可见光谱的高能端；被称为“高能可见光”（）。慢性和急性暴露于这些波长一直是人们关注的焦点，因为它们与眼部健康有关。太阳是到达地球表面的来源，无论是直接到达还是在大气和云层散射后到达。这项研究调查了云层对低太阳仰角（太阳天顶角在 60°到 80°之间）的影响，模拟了全球有办公室工作的人群在清晨和傍晚有机会进行眼部暴露的时间段。由于云层的影响，天空的“变蓝”增强被发现随着云层量的增加而显著增加。提出了一种从更常见的测量的全球太阳辐射（300-3000nm）计算亚热带纬度处的的方法，适用于云层遮挡和不遮挡太阳的所有情况。该方法；当应用于全球太阳辐射数据时，与 60°至 80°太阳天顶角范围内的测量值很好地相关（R=0.82；平均偏差误差（MBE）=-1.62%，平均绝对偏差误差（MABE）=10.3%和均方根误差（RMSE）=14.6%）。该技术可用于开发重复性人类眼部健康应用的危害评估。
