摘要
本文利用两台ＦＡ—１１超声风速温度仪于１９９２年３月到４月间在北京３２５ｍ气象观测塔４７ｍ和１２０ｍ两个高度观测到的风速三个正交分量以及声虚温的湍流脉动资料，计算和分析了北京城郊粗糙下垫面近地层湍流特征量及其日变化，无量纲垂直速度和声虚温的方差随稳定度的变化，风速分量和温度的归一化湍流能谱以及动量和热通量的互谱及其随稳定度的变化。并且与平坦均一下垫面近地层湍流观测的结果进行了对比。
Based upon the data of three orthogonal Wind velocity components and sound temperature measured with two FA-11 ultrasonic anemometer/thermometers at 47 mand 120 m of the Beijing 325 m Metoorological Tower, this paper presents the statistical turbulent characteristics and their diurnal variations in the surface layer over a rough and complex terrain in the northern suburban of Beting. Especlaily, the nondimensiohnal variances of the vertical velocity and sound virtual temperature and their variations with the stability, the normalized velocity component and temperature spectra and cospectra are calculated and compared with the results observed over smooth and homogeneous areas.
出处
《大气科学》
CSCD
北大核心
1994年第6期739-750,共12页
Chinese Journal of Atmospheric Sciences
关键词
城市
近地层
大气湍流
北京
温度计
suburban surface layer
ultrasonic anemometer/thermometer
atmospheric turbulence.
