【摘要】 本文利用１９９０年１０月—１９９２年１０月ＨＥＩＦＥ区张掖站和临泽站的紫外辐射观测资料，分析了ＨＥＩＦＥ绿洲区太阳紫外辐射的气候学特征。结果表明：ＨＥＩＦＥ绿洲区的太阳紫外辐射年平均日总量为０４８ＭＪ／ｍ２，小于青藏高原地区，约为拉萨地区的一半；紫外辐射在总辐射中所占比例较小，年平均值为２９％，其年变化形式为两段台阶形，形成的原因是水汽和气溶胶的共同作用；在紫外辐射与总辐射的关系中，日总量的关系要好于瞬时值的关系；紫外辐射时值，在总辐射中所占的比例总辐射较强时变化较规则，在总辐射较小时，冬季和夏季有不同的变化趋势；比例值与总辐射日总量之间的关系为二次函数关系更多还原

【Abstract】 In this paper,the climatic characteristics of solar ultraviolet radiation over oasis region in HEIFE are analyed on the basis of the solar UV radiation data observed over Zhangye and Linze stations in HEIFE from Oct.1990 to Oct.1992.The results are as following:(1) The annual mean daily total of UV over oasis region in HEIFE is abour 0 48 MJ/m 2,less than that over Qinghai-Xizang Plateau region and about half of that over Lhasa rehion.(2)The ratio of the UV to global radiation is littler than other tegion,the annual mean value is about 3%,there is two step change in annual variation caused by vapor and aerosol.(3)The reationship between the UV and global radiation in daily total is better than that in instantaneous value.(4)There is aregular variation of the tatio of the instantaneous UV to global radiation when global radiaion is strong,but the variation trend are different in summer and winter when global radiation is weak.(5)The ratio of the UV to global radiation is a quadratic function of daily total of global radiation更多还原