中文摘要：

本文利用塔克拉玛干沙漠腹地（塔中站：83°40＇E,39°01＇N）2007年1月-12月紫外辐射和总辐射的观测资料,分析了塔克拉玛干沙漠腹地太阳紫外辐射的气候学特征。结果表明：①本地区太阳紫外辐射年总量为305.64MJ（/m2·a）。年平均日总量为0.84MJ/m2,大于黑河、太湖和青藏高原地区。紫外辐射年平均值在总辐射年平均值中所占比例为4.99%,小于太湖和北京,大于黑河地区和五道梁,月平均日总量7月最大;②其日变化,晴天呈现出标准的倒＂U＂型,即早晚小、中午大,正午达到一天中的最大值;③紫外辐射受云量、降水和沙尘的影响很大;④紫外辐射在总辐射中所占比例有明显的年、季节和日变化,其年变化分为三个明显不同的阶段,夏季大,冬季小。青藏高原地区春夏大,冬季小,北京地区和黑河地区相近,分别是冬季大,夏季小和冬季大,春夏小。

英文摘要：

The Taklimakan Desert, the largest desert in China, is particular and typical in all of other deserts in that it greatly affects the climate and environment in northwestern China. Solar ultraviolet （UV） radiation has been observed in the last few decades, including ecological effects and climatology of ultraviolet radiation. It is of utmost importance to understand the UV radiation over the Taklimakan Desert to protect humans and ecosystems from damages. In this paper, the climatic characteristics of solar ultraviolet radiation and the ratio of the UV radiation to global radiation at Taizhong station （83°40＇E, 39°01＇N）, the desert atmosphere and environment observation experiment station, were analyzed using solar UV radiation and solar global radiation data observed over the Taklimakan Desert hinterland from January to December in 2007. Results showed that the annual gross UV radiation was approximately 305.64 MJ·m-2·y-1. The mean annual daily UV radiation was found to be 0.84 MJ·m-2, greater than that over the oasis regions in the Heihe River, Taihu Lake and Wudaoliang in the Qinghai-Tibet Plateau. The ratio of the UV radiation to global radiation was less than that in Taihu Lake and Beijing, greater than the Heihe River and Wudaoliang, showing an annual mean of 4.99%. The monthly mean of daily UV radiation peaked in July and was the lowest in December, showing a maximum value of 1.23 MJ·m-2 and the minimum value of 0.43 MJ·m-2. The highest instantaneous value was observed to be 67.11 W·m-2 in June and the smallest one was 27.96 W·m-2 in December. Concerning daily variations, UV radiation frequently achieved the largest value at noon, but showed relatively lower values in the morning and evening. Under the conditions of the average number of days with floating dust and sand blowing sand events exceeding 157 in a year over the regions, the effect of precipitation on UV radiation seems to be less than significant. Still, the UV radiation decreased to certain extent under the precipitation con