摘要
利用微机技术建立了一个较为廉价的近地层大气湍流数据实时采集处理系统,在1988年黑河预实验中工作良好,取得了一套较为完整的数据。对戈壁沙滩点的风、温、湿湍流脉动数据进行统计分析和涡旋相关方法处理,结果表明近地层大气的湍强特征符合一般规律。通量分析指出,戈壁地区的水汽通量在白天的绝大多数小时都呈负值(向下),而夜间为正。文中对湍流谱的特征也进行了初步分析。
A low cost, real time turbulence data acquisition system has been developed and successfully operated in the pilot experiment of HEIFE held in a Gobi desert station, August to September of 1988. A compatible set of computing programs has also been prepared and used in the processing of the data of over 150 runs, each lasted 30 to 45 mins. A preliminary analysis of the means, variances, and various turbulent fluxes calculated from the fluctuations of wind components, temperature and humidity, are presented. Most results are fairly good when compared with other resourses. The water vapor fluxes were apparently negative in daytime and positive at night. This feature is worth more careful investigation. Spectra characteristics of various parameters in near neutral stability are analysed. The vertical velocity spectral peak was found near f=0.4, which is higher than others; Its shape is also wider than normal reported.
出处
《高原气象》
CSCD
北大核心
1990年第2期120-129,共10页
Plateau Meteorology
关键词
湍流
涡旋相关法
湍流谱
数据
采集
Turbulence
Turbulence spectra
Eddy-correlation
Data acquisition
