塔克拉玛干沙漠北缘过渡带紫外辐射和总辐射特征

Characteristics of Global Radiation and Ultraviolet Radiation over Desert-oasis Transition Zone of the North Taklimakan Desert

利用塔克拉玛干沙漠北缘沙漠一绿洲过渡带肖塘地区2011年直接探测的辐射资料．对该地区紫外辐射、总辐射状况进行了初步分析。结果表明：紫外辐射、总辐射年变化位相基本相同，年曝辐量分别为242．62、5441．31MJ·m-2，分别比塔克拉玛干沙漠腹地少21％、10％，年平均日曝辐量分别为0．68、15．35MJ·m-2。总辐射辐照度最大值为1329．6W·m-2，紫外辐射辐照度最大值为62．7W·m-2，出现在6月。沙尘暴对紫外辐射的减弱作用最明显，扬沙次之，浮尘减弱作用最小。紫外辐射日平均曝辐量占总辐射日平均曝辐量的3．36％～7．25％，年平均曝辐量占4．45％。

Based on solar radiation measurement data from Xiaotang station over desert-oasis transition zone of the north Taklimakan Desert in 2011, the characteristics of global radiation and ultraviolet （UV） radiation were analyzed. The result showed that monthly variation of global radiation and UV radiation took on the same pattern. Annual total values of global radiation and UV radiation were 5 441.31 MJ-m 2 and 242.62 MJ. m-2 , which were less than the annual total values of global radiation and UV radiation in the Taklimakan desert hinterland by about 21% and 10%, respectively. The daily total values of global radiation and UV radiation were 0. 68 MJ. m 2and 15.35 MJ . m 2, respectively. The maximum instantaneous global radiation （1 329.6 W. m 2 ） and UV radiation （62.7 W. m 2 ） emerged in June. The subtractive effect of sand-dust storm on UV radiation was very strong, and floating dust effect seemed to be relatively weak. The ratio of daily average UV radiation to the daily average global radiation was 3.36 % --7.25 %, and the annual average ratio was 4.45%.