【摘 要】
：
Ultraviolet (UV) solar radiation has a significant influence on human health,the environment and climate. A series of measurements,including UV radiation(290-40
【机 构】
：
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC)
论文部分内容阅读
Ultraviolet (UV) solar radiation has a significant influence on human health,the environment and climate. A series of measurements,including UV radiation(290-400 nm)and global solar radiation(Rs),were continuously recorded from August 2004 at the Lhasa and Haibei sites on the Tibetan Plateau.Both observation sitesaltitudes are above 3000 m and have similar meteorological conditions.The data from 2005-2006 Was used to identify the varying characteristics of UV radiation.ItS relation to the clearness index Ks,the relative optical mass mr,and Rs were established.The annual mean values of total daily UV radiation are 0.92 and 0.67 MJ m-2 at Lhasa and Haibei,respectively.The UV radiation in Lhasa represented 4.6%of the global solar radiation while in Haibei this percentage was 4.2%.In the case of clear days (Ks>0.8),these percentages ranged between 4.O%and 4.5%in Lhasa and between 5.1%and 5.5% in Haibei.In the case of cloudy days(Ks
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