Measurement and Analysis of Environmental Solar UV-B

太阳紫外线-B(UV-B：290-320 nm)天空辐射影响着地球表面的生物和物质。据我们所知，目前还没有关于太阳UV-B天空辐射分布分析的报道。这些项目将评估太阳UV-B天空辐射计，测量太阳UV-B天空辐射的分布，并分析太阳UV-B天空辐射对生命和物质的影响。我们最近研制了一台新的太阳UV-B天空辐射计，用于测量太阳UV-B天空辐射及其分布。该辐射计的UV-B传感器是基于我们实验室研制的全天候UV-B辐射计。辐射度计头有一个UV-B传感器和一个Total(300-3000 nm)传感器，这些传感器可以被UV-A(320-400 nm)传感器取代。每个传感器的视场为11度(全角)。天空辐射计通过个人计算机控制，每隔5分钟扫描12度测量一次太阳UV-B天空辐射。为了分析云对太阳UV-B天空辐射分布的影响，在扫描太阳UV-B天空辐射之前，拍摄了一张红外全天照片。从日出到日落每隔半小时测量一次太阳UV-B天空辐射的分布，分析太阳UV-B天空辐射与云的关系。对太阳UV-B天空辐射的初步分析结果表明，TOTAL和UV-B的太阳晕分布有很大的不同，即UV-B的太阳晕表现出比TOTAL更宽的空间分布。

The solar ultraviolet-B (UV-B : 290-320 nm) sky radiation influences living things and materials on the earth's surface. To our knowledge, there are no reports on the analysis of the distribution of the solar UV-B sky radiance. The projects are to evaluate a solar UV-B sky radiance meter, to measure the distribution of the solar UV-B sky radiance and to analyze the effects of the solar UV-B sky irradiance on life and matters. We recently developed a new solar UV-B sky radiance meter to measure solar UV-B sky radiance and its distribution. The UV-B sensor of the radiance meter is based on the all-weather type UV-B radiometer developed by our laboratory. The radiance meter head has one UV-B sensor together with one Total (300-3000 nm) sensor, and these sensors can be replaced by UV-A (320-400 nm) sensors. The field of view of each sensor is 11 degrees (full angle). The sky radiance meter measures solar UV-B sky radiance every 12 degrees per 5 minutes scanning by personal computer control. To analyze cloud effects on the distribution of the solar UV-B sky radiance, an infrared all sky photograph is taken before scanning solar UV-B sky radiance. The distribution of the solar UV-B sky radiance is measured every half an hour from sunrise to sunset, and then a correlation between solar UV-B sky radiance and clouds is analyzed. Preliminary results of analysis of solar UV-B sky radiance indicate that the distribution of solar aureole of Total and that of UV-B are quite different, that is, the solar aureole of UV-B showed a wider spatial distribution than that of Total.