Resolution of Low-Frequency Attenuation Anomalies in the Southern Hemisphere.

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 th...

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Bibliographic Details
Main Authors: Denham,R N, Bannister,R W, Guthrie,K M, Mellen,R H, Browning,D G
Other Authors: NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT NEW LONDON LAB
Format: Text
Language:English
Published: 1987
Subjects:
Acoustics
Physical and Dynamic Oceanography
*ACOUSTIC ATTENUATION
ACOUSTIC CHANNELS
ANOMALIES
ATTENUATION
LOW FREQUENCY
NEW ZEALAND
OCEANOGRAPHIC DATA
OCEANS
PH FACTOR
SEA WATER
SOUTH PACIFIC OCEAN
SOUTHERN HEMISPHERE
SOUTH(DIRECTION)
UNDERWATER SOUND
ACOUSTIC ABSORPTION
UNDERWATER ACOUSTICS
Southern ocean
New Zealand
Pacific
Southern Ocean
Online Access:http://www.dtic.mil/docs/citations/ADA181754
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA181754
Description
Summary: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. Presented at the Meeting of the Acoustical Society of America (113th) Indianapolis, IN, 11-15 May 87.

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