LOCALIZATION OF INTERNAL GRAVITY-WAVES IN RANDOMLY STRATIFIED OCEAN

Influence of a fine structure of density field upon propagation of sma ll-amplitude internal waves in a deep ocean with constant Brunt-Vaisal a frequency is studied in Boussinesq approximation. The resonant expan sion method for Green functions is used to obtain expressions for a se cond order moment of radiated by a distributed source field in a rando mly stratified fluid. The possibilities of wave energy localization in vertical direction as well as of fluctuation waveguide formation in t he absence of regular wave refraction are demonstrated. Basing on resu lts of the density fine-structure spectra measurements the region in f requency-wavelength domain is determined where the localization effect s could manifest themselves in the main oceanic pycnocline.