摘要
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%。
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.
出处
《干旱气象》
2015年第4期684-693,共10页
Journal of Arid Meteorology
基金
国家重大科学研究计划(2012CB955302)资助
关键词
半干旱区
总云量
太阳总辐射
相关性
semi-arid region
total cloud fraction
total solar radiation
correlation
作者简介
曹越前（1992-），男，江苏南通人，硕士研究生．E—mail：Atmos_caoyq@163．com
