Ultraviolet Radiation in Overcast Sky at the Surface
自建辉;王庚辰;胡非
【期刊名称】《大气科学进展（英文版）》 【年(卷),期】2003(020)006
【摘要】Based on the analysis of one year of observation data of solar radiation at the ground in Beijing in 1990, a simple empirical formula for calculating UV radiation in overcast sky is established. The formula is Quv/Quv0 = A1S + A0, where Quv and Quvo are monthly mean daily sums of UV exposure in overcast sky and clear sky, respectively. S is the daily sunshine hours. The calculated results agree well with the observed. The maximum and minimum relative biases are 9.9% and 0.1%, respectively, and the yearly relative bias is 2.9%. The ratio of ultraviolet radiation of overcast sky to clear sky in 1990 is between 44.6% and 61.8%, and the yearly average is 53.9%. Thus, almost half of the UV energy is lost in the atmosphere in overcast sky in 1990. 【总页数】3页(1007-1009)
【关键词】ultraviolet radiation;overcast sky;sunshine hours;cloudiness 【作者】自建辉;王庚辰;胡非
【作者单位】Laboratory for Middle Atmosphere Layer and Global Environment Observation,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;State Key Laboratory of Atmospheric
Boundary
Layer
Physics
and
Atmospheric
Chemistry,Institute of Atmos;Laboratory for Middle Atmosphere Layer and Global Environment Observation,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;State Key Laboratory of Atmospheric
Boundary
Layer
Physics
and
Atmospheric
Chemistry,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 【正文语种】中文 【中图分类】 【相关文献】
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Ultraviolet Radiation in Overcast Sky at the Surface
