CAJ | 학술논문

利用兰州大学半干旱气候与环境观测站2008年全天空成像仪、微脉冲激光雷达和太阳总辐射观测资料，分析了不同时间段内云量的变化特征及其与太阳辐射的关系。结果表明：2008年3~8月总云量经历了先上升后下降的过程，其中3~5月缓慢上升，各月总云量都在8成以上；6~8月显著下降，但各月总云量都大于6成，说明半干旱区春夏季云量充足，属“不缺云”状态；同一时段内，太阳总辐射先“变亮”后“变暗”，即3~5月大幅上升，6~8月逐步下降；总云量与太阳总辐射存在显著的负相关关系，相关因子 R2=0.68；低云、中云、高云对地面太阳辐射的相对影响值分别为-23.01%、-3.33%和13.09%。
이용란주대학반간한기후여배경관측참2008년전천공성상의、미맥충격광뢰체화태양총복사관측자료，분석료불동시간단내운량적변화특정급기여태양복사적관계。결과표명：2008년3~8월총운량경력료선상승후하강적과정，기중3~5월완만상승，각월총운량도재8성이상；6~8월현저하강，단각월총운량도대우6성，설명반간한구춘하계운량충족，속“불결운”상태；동일시단내，태양총복사선“변량”후“변암”，즉3~5월대폭상승，6~8월축보하강；총운량여태양총복사존재현저적부상관관계，상관인자 R2=0.68；저운、중운、고운대지면태양복사적상대영향치분별위-23.01%、-3.33%화13.09%。
Variation of cloud fraction and its relationship with solar radiation in 2008 were analyzed based on data derived from Total Sky Imager,Micro Pulse Lidar and total solar radiation over the Semi-Arid Climate and Environment Observatory of Lanzhou Universi-ty(SACOL,35. 57°N,104. 08°E). The results indicated that during research period the total cloud fraction rose up slowly from March to May and in each month the total cloud accounted for over 80%,and fell down dramatically from June to August but it was still more than 60%. During the same period,the total solar radiation increased( brightening)sharply from March to May,then decreased ( dimming)steadily from June to August. There was a significant negative correlation between total cloud fraction and total solar radia-tion,the correlation factor R2 was 0. 68. The relative values of low,medium and high clouds impacted on surface solar radiation were-23. 01%,-3. 33% and 13. 09%,respectively.