Nonlinear interactions between gravity waves with different wavelengths and diurnal tide

摘要: By using a compressible nonlinear two-dimensional gravity wave model, we simulate the interactions between waves (GWs) with three different vertical wavelengths and meridional component of diurnal tidal wind temperature (30 degrees N, September) calculated from GSWM-00. We also compare results simulation GWs propagation in background zero wind. Consistent dispersion relation, numerical experiments show that reduces when it is same direction as propagation, thus increases perturbative shear likelihood instability breaking, especially for shorter wavelengths. The breaking below critical level can increase amplitude due to momentum deposition. Because GW penetration height wavelength, at higher altitudes more likely be affected by large Therefore not only accelerates mean winds, but amplitudes tide various altitudes.