Accession Number : ADA332748

Title :   Physical and Biological Descriptors for Ocean Bubbles and Acoustic Surface Backscatter

Descriptive Note : Final rept. 1 Oct 94-30 Sep 97

Corporate Author : JOHNS HOPKINS UNIV LAUREL MD DEPT OF SUBMARINE TECHNOLOGY

Personal Author(s) : Hanson, Jeffrey L.

PDF Url : ADA332748

Report Date : 30 SEP 1997

Pagination or Media Count : 37

Abstract : Processes related to the supply, mixing, and removal of ocean bubbles and their impact on low frequency (0-1000 Hz) acoustic surface scattering strength (SSS) in the upper ocean have been investigated. A key finding is that gross site-to-site differences between Critical Sea Test and Chapman-Harris SSS observations are explained by the mean ocean temperature, biological productivity, and wave conditions at each site. Furthermore, wave energy dissipation rate, estimated from wave spectra using wave energy flux considerations, was found to be a better descriptor for ocean whitecaps, related to upper ocean bubble supply, than wind speed. These results demonstrate that a model could be developed for estimating SSS statistics in coastal areas using readily available (by satellite and operational models) environmental inputs.

Descriptors :   *OCEAN SURFACE, *ACOUSTIC SCATTERING, DISSIPATION, BUBBLES, LOW FREQUENCY, BIOLOGICAL PRODUCTS.

Subject Categories : Physical and Dynamic Oceanography
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE