Ice Statistics and Acoustic Scattering in the Arctic Basin.

Acoustic propagation in the Arctic is intimately related to the structure of surface pack ice. In this paper, reflection loss and transmission loss are calculated based upon statistical models of ice roughness. Statistical models of ice ridges are introduced and techniques for estimating the roughne...

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Bibliographic Details
Main Author: Greene,R R
Other Authors: SCIENCE APPLICATIONS INTERNATIONAL CORP MCLEAN VA
Format: Text
Language:English
Published: 1984
Subjects:
Snow
Ice and Permafrost
Acoustics
*TRANSMISSION LOSS
SURFACE ROUGHNESS
ICE
SOUND TRANSMISSION
PARABOLAS
STATISTICAL ANALYSIS
EQUATIONS
ACOUSTIC SCATTERING
ARCTIC REGIONS
HIGH ANGLES
ACOUSTIC REFLECTION
RIDGES
ARCTIC OCEAN
PACK ICE
UNDERICE
ARCHAPE(Arctic High Angle Parabolic Equations)
Parabolic equations
Arctic
Arctic Ocean
Arctic Basin
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA150141
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA150141
Description
Summary:Acoustic propagation in the Arctic is intimately related to the structure of surface pack ice. In this paper, reflection loss and transmission loss are calculated based upon statistical models of ice roughness. Statistical models of ice ridges are introduced and techniques for estimating the roughness spectrum of ridged surfaces are developed. Next, a model for estimating the mean reflection loss is introduced. The reflection loss formulas are based on the statistical models for roughness. Transmission loss calculations using High-Angle parabolic equation (ARCHAPE) in a simulated Arctic environment are compared with data. The results demonstrate that rough surface scattering from random-depth ice keel structures can account for the observed rate of transmission loss in the Arctic. Keywords include: Acoustic Scattering, and Propagation loss.

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