Accession Number:

ADA429940

Title:

DRI internal Wave Simulations

Descriptive Note:

Technical memo

Corporate Author:

WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB

Personal Author(s):

• Reynolds, Stephen A.
• Levine, Murray D.

Report Date:

2005-01-01

Pagination or Media Count:

19.0

Abstract:

The ocean is a stratified medium and thus filled with internal gravity waves. Even though the statistics of these fluctuations are fairly well known, these waves fluctuate randomly and hence represent true uncertainty. When an acoustic prediction is needed for an ocean region, knowledge of the background sound speed profile is an additional uncertainty. A processing module is developed that takes profile estimates as input and uses numerically simulated linear internal wave displacements to create two-dimensional range-dependent sound speed fields. These fields are available for use in acoustic modeling and target estimation studies. Field realizations were obtained for four ocean regions. These examples illustrate variability induced by internal waves and how this variability may be useful in some important ways.

Descriptors:

• *UNDERWATER ACOUSTICS
• *INTERNAL WAVES
• MATHEMATICAL MODELS
• COMPUTERIZED SIMULATION
• UNCERTAINTY
• ACOUSTIC VELOCITY
• GRAVITY WAVES

Subject Categories:

• Physical and Dynamic Oceanography
• Acoustics
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE