Accession Number:

ADA617707

Title:

Analysis of Whitecap Data from TREX13

Descriptive Note:

Annual rept.

Corporate Author:

SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB

Personal Author(s):

Report Date:

2014-09-30

Pagination or Media Count:

8.0

Abstract:

The long-term goal is to develop remote monitoring techniques of wave breaking that will allow prediction of the acoustical effects of bubbles beneath the sea surface as a function of acoustic frequency and wind speed. Recent work has shown that, for a given wind speed driving wave breaking, there exists a critical bubble radius that controls the frequency-dependent scattering and absorption of sound incident on the sea surface1. Sound at frequencies equal to or greater than the natural frequency of the bubble with a critical radius tends to be absorbed within a somewhat persistent bubble layer at the surface whereas lower frequency sound is more simply refracted by the layer. The remote monitoring of wave breaking as a function of wind speed coupled with observations of reverberation in different frequency regimes will enable models of reverberation that incorporate bubble effects to be tested, furthering the ultimate objective of predicting optimal frequency bands for acoustic instrument performance under wind-driven seas.

Subject Categories:

  • Meteorology
  • Physical and Dynamic Oceanography
  • Computer Programming and Software
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE