Establishing a Ultraviolet Radiation Observational Network and Enhancing the Study on Ultraviolet Radiation

On the basis of analyzing observational data on solar radiation, meteorological parameters, and totalozone amount for the period of January 1990 to December 1991 in the Beijing area, an empirical calculationmethod for ultraviolet radiation (UV) in clear sky is obtained. The results show that the calculated valuesagree well with the observed, with maximum relative bias of 6.2% and mean relative bias for 24 months of1.9%. Good results are also obtained when this method is applied in Guangzhou and Mohe districts. Thelong-term variation of UV radiation in clear sky over the Beijing area from 1979 to 1998 is calculated, andthe UV variation trends and causes are discussed: direct and indirect UV energy absorption by increasingpollutants in the troposphere may have caused the UV decrease in clear sky in the last 20 years. With theenhancement of people's quality of life and awareness of health, it will be valuable and practical to providUV forecasts for typical cities and rural areas. So, we should develop and enhance UV study in systematicmonitoring, forecasting, and developing a good and feasible method for UV radiation reporting in China,especially for big cities.

作 者： 白建輝 王庚辰   作者單位： Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029  刊 名： 大氣科學進展(英文版)  ISTIC SCI 英文刊名： ADVANCES IN ATMOSPHERIC SCIENCES  年，卷(期)： 2003 20(5)  分類號： P4  關鍵詞： ultraviolet radiation   observational network   variation trend