Accession Number : ADA181754

Title :   Resolution of Low-Frequency Attenuation Anomalies in the Southern Hemisphere

Descriptive Note : Technical document

Corporate Author : NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT

Personal Author(s) : Denham, R N ; Bannister, R W ; Guthrie, K M ; Mellen, R H ; Browning, D G

PDF Url : ADA181754

Report Date : 01 Jun 1987

Pagination or Media Count : 14

Abstract : During Project Kiwi One, anomalously high values of low-frequency attenuation were observed in the central South Pacific Ocean. Similar results were obtained along the track from New Zealand into the Southern Ocean during Project Tasman Two. A recent analysis of oceanographic data by Mellen shows that both regions are included in a relatively high pH contour at the sound channel axis. The corresponding predicted values of attenuation are in reasonable agreement with the measured data. Keywords: Underwater sound absorption; Acoustic attenuation; pH factor; Sea water.

Descriptors :   *ACOUSTIC ATTENUATION, ACOUSTIC ABSORPTION, ACOUSTIC CHANNELS, ANOMALIES, ATTENUATION, LOW FREQUENCY, NEW ZEALAND, OCEANOGRAPHIC DATA, OCEANS, PH FACTOR, SEA WATER, SOUTH PACIFIC OCEAN, SOUTH(DIRECTION), SOUTHERN HEMISPHERE, UNDERWATER ACOUSTICS, UNDERWATER SOUND

Subject Categories : Physical and Dynamic Oceanography
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE