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Anisotropy of the horizontal velocity fluctuation field in the large wavenumber region
Wu, Y. F.; Xu, J. Y.; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationScience in China Series D-Earth Sciences
2003
Volume46Issue:3Pages:210-216
ISSN1006-9313
Language英语
KeywordVelocity Fluctuation Spectra Forked Point Anisotropy Large Wavenumber Gravity-wave Spectrum Middle Atmosphere Universal Spectrum Mac Epsilon Foil Chaff Mesosphere Stratosphere Saturation Summer Turbulence
AbstractThis paper utilizes meridional and zonal velocity data measured by chaff rockets at a high resolution of 25 m in the 67-96 km region during the MAC/SINE campaign to study the characteristics of the spectra of the meridional and zonal velocity fluctuations. Results suggest that(.)the mean vertical wavenumber spectra have a forked point near vertical wavenumber k = 0.001 m(-1). In the vertical wavenumber region smaller than the forked point, the spectra of: the meridional and zonal velocities have approximately the same spectral slope, amplitude, and characteristic vertical wavelength, and agree well with the linear saturated spectral model. In the vertical wavenumber region larger than the forked point, however, the meridional and zonal spectra are inconsistent not only in both slope and amplitude, but also in spectral structure. The differences between the observed meridional and zonal spectra provide observational evidence of azimuthal anisotropy of the velocity fluctuation field in the large vertical wavenumber region in mean sense.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1013
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
Wu, Y. F.,Xu, J. Y.,北京8701信箱. Anisotropy of the horizontal velocity fluctuation field in the large wavenumber region[J]. Science in China Series D-Earth Sciences,2003,46(3):210-216.
APA Wu, Y. F.,Xu, J. Y.,&北京8701信箱.(2003).Anisotropy of the horizontal velocity fluctuation field in the large wavenumber region.Science in China Series D-Earth Sciences,46(3),210-216.
MLA Wu, Y. F.,et al."Anisotropy of the horizontal velocity fluctuation field in the large wavenumber region".Science in China Series D-Earth Sciences 46.3(2003):210-216.
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