Parisi A V, Turnbull D J, Turner J
Faculty of Sciences, University of Southern Queensland, Toowoomba, 4350, Australia.
Int J Biometeorol. 2009 Jan;53(1):11-5. doi: 10.1007/s00484-008-0186-z. Epub 2008 Oct 25.
The short wavelength cut-off (lambdac), the wavelength of the maximum spectral UV (lambdaMax) of spectral pre-vitamin D3 effective solar UV irradiance (UVD3), and the spectral erythemal UV (UVEry) were compared at 5-min intervals over a 6-month period at solar zenith angles (SZA) ranging from 4.7 degrees to 80 degrees. Averaged over the entire period, lambdac for UVD3 is higher by 1.05 nm than that for UVEry. The lambdaMax is higher for UVD3 compared to UVEry for SZA<approximately 50 degrees. For higher SZA (>55 degrees), the ratio of lambdaMax for UVD3 to that for UVEry is less than 1. As the erythemal action spectrum extends into the UVA, the ratio of UVD3 to UVEry irradiances decreases with increasing SZA, along with a decrease in the ratio of lambdaMax for UVD3 compared to UVEry. The changes in lambdac and lambdaMax influence both personal UVD3 and UVEry exposure and, to take this into account, a dual calibration technique for polysulphone dosimeters has been developed to simultaneously provide measurements of both types of exposure.
在太阳天顶角（SZA）从4.7度到80度的范围内，每隔5分钟比较一次短波截止波长（λc）、光谱前维生素D3有效太阳紫外线辐照度（UVD3）的最大光谱紫外线波长（λMax）以及光谱红斑紫外线（UVEry），为期6个月。在整个时间段内平均来看，UVD3的λc比UVEry的λc高1.05纳米。当SZA＜约50度时，UVD3的λMax高于UVEry的λMax。对于更高的SZA（＞55度），UVD3的λMax与UVEry的λMax之比小于1。随着红斑作用光谱延伸到UVA，UVD3与UVEry辐照度之比随着SZA的增加而降低，并伴随着UVD3的λMax与UVEry的λMax之比的降低。λc和λMax的变化会影响个人UVD3和UVEry暴露量，为了考虑到这一点，已开发出一种用于聚砜剂量计的双校准技术，以同时提供这两种类型暴露量的测量值。
