Isentropic advection by gravity waves: quasi-universal M-3 vertical wavenumber spectra near the onset of instability

Details Isentropic advection by gravity waves: quasi-universal M-3 vertical wavenumber spectra near the onset of instability Isentropic advection by gravity waves: quasi-universal M-3 vertical wavenumber spectra near the onset of instability

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..201e&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 2, p. 201-204

Physics

Geophysics

16

Meteorology And Atmospheric Dynamics: Waves And Tides, Meteorology And Atmospheric Dynamics: Middle Atmosphere Dynamics, Oceanography: Physical: Internal And Inertial Waves, Mathematical Geophysics: Nonlinear Dynamics

Scientific paper

A two-dimensional model was used to advect air parcels under the influence of a linear superposition of hydrostatic gravity waves. As wave amplitudes increased, vertically profiled wave perturbations became nonsinusoidal, producing increased spectral power at large wavenumbers M. At saturation amplitudes just before onset of convective instabilities, these ``tail spectra'' assumed universal M-3 shapes, similar to observed spectra in the atmosphere and oceans.

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