HR: 0830h
AN: OS41A-07    [Abstracts]
TI: Wavelet analysis of internal gravity waves
AU: * Hawkins, J
EM: jhawkins@psislidell.com
AF: Planning Systems Incorporated, 115 Christian Lane, Slidell, LA 70458 United States
AU: Warn-Varnas, A
AF: Naval Research Laboratory, Code 7322, Stennis Space Center, MS 39529 United States
AU: Chin-Bing, S
AF: Naval Research Laboratory, Code 7322, Stennis Space Center, MS 39529 United States
AU: King, D
AF: Naval Research Laboratory, Code 7322, Stennis Space Center, MS 39529 United States
AU: Smolarkiewicsz, P
AF: National Center for Atmospheric Research, NCAR/MMM Division, P.O. Box 3000, Boulder, CO
AB: A series of model studies of internal gravity waves (igw) have been conducted for several regions of interest. Dispersion relations from the results have been computed using wavelet analysis as described by Meyers (1993). The wavelet transform is repeatedly applied over time and the components are evaluated with respect to their amplitude and peak position (Torrence and Compo, 1998). In this sense we have been able to compute dispersion relations from model results and from measured data. Qualitative agreement has been obtained in some cases. The results from wavelet analysis must be carefully interpreted because the igw models are fully nonlinear and wavelet analysis is fundamentally a linear technique. Nevertheless, a great deal of information describing igw propagation can be obtained from the wavelet transform. We address the domains over which wavelet analysis techniques can be applied and discuss the limits of their applicability.
DE: 4544 Internal and inertial waves
DE: 4546 Nearshore processes
SC: Ocean Sciences [OS]
MN: 2005 Joint Assembly