应用大口径闪烁仪测量近地表横向风速的研究  

Remote Sensing of Crosswind Speed by a Scintillometer in Boundary Layer

作　　者：田勇志[1,2] 刘建国[1] 陆亦怀[1] 桂华侨[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室,安徽合肥230031 [2]中国科学院研究生院,北京100049

出　　处：《大气与环境光学学报》2012年第5期333-337,共5页Journal of Atmospheric and Environmental Optics

基　　金：国家自然科学基金(60908035);中国科学院知识创新工程重要方向项目(KZCX2-YW-411)资助

摘　　要：研究了两种光闪烁法测量近地表风速的方法,给出横向风速的计算公式。根据计算方法,在330 m的距离上进行风速反演实验,与超声风速计测量结果对比表明,两种反演方法都能准确可靠地获取区域横向风速,但在大气稳定度过渡期,斜率法精度更高。测量平均时间越长,结果一致性越好。结果表明,在一个较大区域里,大口径闪烁仪能同时给出显热和横向风速,可以很好地应用于边界层物质交换评价。Two optical scintillation methods of measuring the crosswind speed were investigated in the bound- ary layer. Then, the calculation formulas of wind measurements were proposed. The experiment was carried out at 330 m optical path. Finally the measurements were compared to the results of the sonic anemometer. The results showed two optical scintillation methods were both suitable to determine the windspeed, but the slope technique was more reliable than the peak technique at the time during sunrise and sunset transitions. It was also found that better results can be obtained with the longer time-average. The results demonstrated that a large aperture scintillometer can be used to measure both sensible heat flux and crosswind, so it would be widely applied in evaluation of mass exchange in the atmosphere

关 键 词：大口径闪烁仪 横向风速 峰值法 斜率法 

分 类 号：P332[天文地球—水文科学]