Ice Statistics and Acoustic Scattering in the Arctic Basin.

• 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

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.