金塔绿洲湍流资料的质量控制研究

• 作 者: 王少影 张宇 吕世华 奥银焕 李锁锁 陈世强
• 机 构: 中国科学院,寒区旱区环境与工程研究所西部气候环境与灾害实验室,甘肃,兰州,730000;中国科学院研究生院,北京,100049
• 出 处: 高原气象
• 发表日期: 2009年6期
• 关键词: Jinta oasis Quality control Coordinate rotation Non-stationary test Integralturb

利用“绿洲系统能量与水分循环过程观测试验”2005年绿洲、戈壁点的观测资料,分析了三种坐标旋转方案对摩擦速度、感热、 潜热以及非定常性检验与湍流积分统计性检验的影响,对两种非定常检验方法进行了比较,并对通量资料进行了总体的质量控制和分级.结果表明:三种坐标旋转方案对摩擦速度、感热、潜热通量以及非定常性检验与湍流积分统计性检验的影响存在着一定的差异,这与坐标旋转方案本身有着密不可分的关系.两种非定常性检验方法存在一定的不一致性,这种不一致性的产生不仅与两种NS检验方法有关,也可能与湍流测定成分随时间、 天气条件或测定点相对于气象条件的变化以及与观测仪器本身有关.归一化标准差随稳定度的变化基本满足“1/3次方规律”或“-1/3次方规律”,但坐标旋转方案不同,归一化标准差与稳定度的拟合关系不同,其差异在于三种坐标旋转方案对平均垂直速度的处理方法以及平均水平风的选择上.整体分级后各级资料所占百分比要明显低于任一个单独检验的各级资料所占百分比,非理想的观测值多出现在夜间以及日出日落前后.“,”The influence of three coordinate rotation methods on momentum,scalars fluxes,non-stationary,and integral turbulence characteristics over typical heterogeneous surface are compared. The data was taken from “The Oasis System Energy and Water Cycle Field Experiment”,which held in the Jinta County on June 18 to July 8,2005. The results revealed that the influence of three coordinate systems on those variables and tests have some differences more or less. The non-univocal identification of the non-stationary time series is related to the changes of turbulence elements with time and measurement site relative to meteorological conditions,instrumental limitations and so on. The normalized velocity (temperature) standard deviations vs. Z/L are obey the (-)1/3 powers law,but for used the different coordinate rotation methods,the regression equations of normalized standard deviations vs. Z/L are also have differences,which maybe caused by the processes of vertical wind component and the choice of horizontal wind in different coordinate rotation methods. The classification for overall dataset was performed according to the non-stationary test and integral test.