南极拉斯曼丘陵地区紫外辐射的特征

本文对南极拉斯曼丘陵地区１９９３年２月～１９９４年１２月的紫外辐射和总辐射资料进行了初步分析。结果表明该地区地表接收到的太阳辐射能主要集中在暖季（１０～２月），紫外辐射和总辐射分别占年总量的８７％和８６％。极昼期间辐射通量特别强，紫外辐射和总辐射１１～１月的平均强度超过青藏高原和北极圈附近地区夏季（６～８月）的平均强度。南极春季（９～１０月）臭氧洞期间，臭氧减少不但对紫外辐射Ｂ波段有显著的增加作用，对紫外辐射和总辐射也有一定的作用，紫外辐射和总辐射与斜程柱臭氧总量都呈对数关系。

THE CHARACTERISTICS OF ULTRAVIOLET RADIATION IN 1993-1994 AT THE LARSEMANN HILLS,ANTARCTICA

In this paper characteristics of the ultraviolet radiation(UV) and global radiation(Q) from February,1993 to December,1994 at the Larsemann Hills of Antarctica are analysed.The result shows that the most part of UV and Q received at the horizontal surface was mainly in the warm season(Oct.-Feb.). They were 87% and 86% of the annual total amounts respectively. The strongest radiation flux appeared in polar days and UV was 65% of its annual amount.The same ratios for the Naqu of the Qinghai,Qingzang Plateau and the Bergen of the Arctic circle edge in midsummer were 52% and 47%.The ratio between UV and Q in springtime at the Larsemann Hills was larger than that in other seasons and this phenomenon was not appeared in Naqu of the Qingzang Plateau and Bergen of the Arctic circle edge. That means decrease of ozone abundance in springtime at the Larsemann Hills not only obviously enhances UVB, but also has effect on the UV and Q,and their relations were basically met by the relationship of logarithmic line.