Nonlinear interactions between gravity waves with different wavelengths and diurnal tide

	Nonlinear interactions between gravity waves with different wavelengths and diurnal tide
	Liu X(刘晓) ; Xu JY(徐寄遥) ; Liu, H. L. ; Ma RP(马瑞平)
刊名	Journal of Geophysical Research-Atmospheres
	2008
卷号	113 期号:D8 页码:D08112
关键词	middle atmosphere lower thermosphere mesopause region mean state model mesosphere turbulence propagation dynamics breaking
ISSN号	0148-0227
通讯作者	北京8701信箱
英文摘要	By using a compressible nonlinear two-dimensional gravity wave model, we simulate the nonlinear interactions between gravity waves (GWs) with three different vertical wavelengths and a meridional component of the diurnal tidal wind and temperature (30 degrees N, September) calculated from GSWM-00. We also compare the results with the simulation of GWs propagation in a background with zero wind. Consistent with the dispersion relation, the numerical experiments show that tidal wind reduces the vertical wavelengths of the GWs when it is in the same direction as the wave propagation, and thus increases the perturbative shear and the likelihood of instability and wave breaking, especially for waves with shorter vertical wavelengths. The breaking of GWs below the critical level can increase the amplitude of diurnal tidal wind due to the momentum deposition. Because the GW penetration height increases with vertical wavelength, the amplitude of diurnal tidal wave at higher altitudes is more likely to be affected by GWs with large vertical wavelengths. Therefore gravity wave breaking not only accelerates the mean winds, but also increases the amplitudes of the diurnal tide at various altitudes.
学科主题	空间物理
收录类别	SCI
原文出处	http://www.agu.org/pubs/crossref/2008/2007JD009136.shtml
语种	英语
内容类型	期刊论文
源URL	[http://ir.cssar.ac.cn/handle/122/1120]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Liu X,Xu JY,Liu, H. L.,et al. Nonlinear interactions between gravity waves with different wavelengths and diurnal tide[J]. Journal of Geophysical Research-Atmospheres,2008,113(D8):D08112.
APA	刘晓,徐寄遥,Liu, H. L.,&马瑞平.(2008).Nonlinear interactions between gravity waves with different wavelengths and diurnal tide.Journal of Geophysical Research-Atmospheres,113(D8),D08112.
MLA	刘晓,et al."Nonlinear interactions between gravity waves with different wavelengths and diurnal tide".Journal of Geophysical Research-Atmospheres 113.D8(2008):D08112.