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近20年北京晴天紫外辐射的变化趋势 被引量:16

The Variation Trends of Ultraviolet Radiation in Clear Sky during the Last Two Decades in Beijing
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摘要 在对北京晴天 1 990年 1月~ 1 991年 1 2月太阳辐射观测资料进行了详细分析的基础上 ,得到了计算晴天紫外辐射的计算公式 ,结果表明 ,计算值与观测值吻合得比较好 ,计算值与观测值的最大相对偏差为 6 2 % ,2 4个月相对偏差的平均值为 1 9%。利用此公式计算了北京晴天 1 979~ 1 998年的紫外辐射 ,并给出了 1 979~ 1 998年紫外辐射的变化趋势 ,发现近 2 0年北京地区晴天的紫外辐射呈下降趋势 ,并对其产生原因以及影响紫外辐射的各个因子进行了详细分析。 On the basis of analyzing observational data about solar radiation, meteorological parameter and total ozone amount during the period of 1979~1998 in Beijing area, an empirical calculating method for UV radiation in clear sky is obtained, the results show that the calculated values agree well with those observed. The maximum relative bias is 6 2%, and the mean relative bias for 24 months is 1 9%. The long-term UV radiation from 1979 to 1998 is calculated by using this method, and UV variation trends are given by different ways. It is found that the UV radiation in clear sky shows a decreasing trend in the last 20 years. The long-term variation trends and relations of UV with its main factors affecting UV including ozone, water vapor, and D/S are discussed thoroughly.
出处 《大气科学》 CSCD 北大核心 2003年第2期273-280,共8页 Chinese Journal of Atmospheric Sciences
基金 国家自然科学基金资助项目 4 0 1750 31 中国科学院知识创新工程项目KZCX2 - 2 0 4 中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室KF - 2 0 0 2 - 0 2项目共同资助
关键词 北京 晴天 紫外辐射 臭氧 水汽 气溶胶 污染物 ultraviolet radiation ozone water vapor aerosol pollutant
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  • 1[1]Gantner, L., P. Winkler, and U. Khler, A method to derive long-term time series and trends of UV-B radiation (1968~1997) from observations at Hohenpeissenberg (Bavaria), J.Geophys.Res., 2000, 105(D4),4879~4888.
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