北京上空中层顶区域重力波参数关系的激光雷达研究

Subjects: Geosciences >> Space Physics submitted time 2016-05-04

龚少华 刘正宽 关塞 焦菁 沈振江 羊大力 孙书娟 陈春霞

Abstract： Based on the long-term observations from Beijing sodium lidar of Chinese Meridian Project, 162 monochromatic gravity waves was distinguished in the sodium layer during the 2208 hours' observation in 253 nights (from 2010 April to 2011 September). The vertical wavelength, wave period, wave amplitude and its growth factor of every monochromatic gravity wave were precisely extracted with the method derived by Yang et al. (2008). Statistical results reveal that there are systematic relationships between those wave parameters, and they respectively are λz=0.226Tob0.530, KE=6.66×10-10 kZ-3.091 and KE=8.97×10-6 fob-1.696 Those results partially agree well with the results predicted by Gardner's (1994) diffusive filtering theory. However, it is found incorrect to regard the wave-induced eddy diffusivity as the only main damping processes of gravity waves. It is suggested that the damping processes caused by other possible factors also play important roles in the saturation and dissipation mechanisms of gravity waves. ©, 2015, Chinese Society of Astronautics. All right reserved.

Peer Review Status:Awaiting Review

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