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Doppler spreading of internal gravity waves by an inertia-wave packet
Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, California, USA
Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, California, USA
Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, California, USA
School of Mathematics and Statistics, University of Sydney, NSW, Australia
Present Doppler-spreading models for the high wave number end of atmospheric and oceanic internal wave spectra either neglect the time dependence of the background long-wave shear entirely, or ignore time-dependent effects in their parameterization of dissipation. Through ray tracing and numerical simulations the Doppler spreading of an idealized interaction between a short internal-wave packet by an inertia-wave packet is examined. The results are sufficient to show that time dependence in the long-wave shear can make a significant difference to short-wave behavior, and will need to be taken into account in future modeling efforts.
Received 13 June 2007; accepted 25 January 2008; published 15 May 2008.
Citation: (2008), Doppler spreading of internal gravity waves by an inertia-wave packet, J. Geophys. Res., 113, C05018, doi:10.1029/2007JC004390.
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