北京地区太阳紫外辐射的基本特征

1990年1月至1991年3月在中国科学院大气物理研究所香河观测站(北京东南70公里处)利用国产TBQ-4型分光辐射表及配套的智能辐射记录仪，对近地面太阳紫外辐射进行了观测，得到此间北京地区近地面太阳紫外辐射及其占太阳总辐射比例的变化特征，并分析了差异的原因。给出了1990年1月至1091年3月太阳紫外辐射的极值及对应的紫外辐射占总辐射的比例，后者同太阳总辐射存在反相关。

THE BASIC CHARACTERISTICS OF THE SOLAR ULTRA-VIOLET RADIAT ION OVER THE BEIJING DISTRICT

The variation characteristics of the solar ultraviolet radiation near the ground are analysed clearly, by using the observational data of the solar ultraviolet radiation in Xianghe station (70 kilometers to the southeast of Beijing) during period of January 1990-March 1991. All data are obtained by the model TBQ-4 spectral pyranometer. The variation of ratio of the solar ultraviolet radiation to the total solar radiation over Beijing district during this period is obtained and reason of this variation is also analysed. In order to estimate the dangerous degree of the possible increased solar ultraviolet radiation to the human health and ecological environment, the maximum of the solar ultraviolet radiation for each month and corresponding the ratio from January 1990 to March 1991 are given, results show that the anticorrelation between the ratio of the solar ultraviolet radiation to the total solar radiation and total solar radiation is existed.