大孔径闪烁仪观测中的相似理论适用性分析

Analysis on the Applicability of Similarity Theory in Large Aperture Scintillometer Observations

利用2009年馆陶站(1-12月)和阿柔站(1-6月和10-11月)的大孔径闪烁仪LAS相关数据,分析了LAS观测中莫宁—奥布霍夫相似理论MOST理论的适用性,并探讨了MOST理论适用性的定量判断方法。结果表明:(1)在不稳定条件下,大尺度涡旋运动、大气湍流发展状况和温度尺度都能对MOST理论适用性产生显著影响;(2)确立了两种新的MOST理论适用性判断方法,即因子分析法和温度结构参数法,并验证了这两种判断方法是合理、可靠的。

LAS（Large Aperture Scintillometer） observational data at Guantao station（from January to December） and A＇rou station（from January to July and from October to November） in 2009 were used to analyze the applicability of MOST（Monin-Obukhov similarity theory） in LAS observations.The quantitative evaluation method was also discussed.The results show that：（1） The applicability of MOST is significantly influenced by the large-eddy movement,atmospheric turbulence development and temperature scale under unstable condition signally.（2） Two new evaluation methods,such as the factor analysis method and the temperature structure parameter method,are established.The rationality and reliability of these two methods are also proved by the validation results.