Deployment of Autonomous Hydrophone Array in the Scotia Sea

The remote area of the Atlantic Ocean near the Antarctic Peninsula and the South Scotia Sea is a region where acoustic surveillance by International Monitoring System (IMS) hydrophones is at best limited. Sound originating in this area is either blocked or hindered by the South Georgia Islands (SGI)...

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Bibliographic Details
Main Authors: Mastsumoto, Haru, Bohnenstiehl, Del R., Dziak, Robert P., Embley, Robert W., Park, Minkyu
Other Authors: OREGON STATE UNIV NEWPORT HATFIELD MARINE SCIENCE CENTER
Format: Text
Language:English
Published: 2008
Subjects:
Acoustics
*ACOUSTIC SURVEILLANCE
*ANTARCTIC REGIONS
*HYDROPHONES
HARMONICS
ARRAYS
CONFIGURATIONS
ACOUSTIC ARRAYS
SOUND TRANSMISSION
SELF OPERATION
INTERNATIONAL
ATLANTIC OCEAN
REMOTE AREAS
OCEAN BOTTOM TOPOGRAPHY
SOUTH(DIRECTION)
UNDERWATER SOUND
OCEAN BOTTOM
ISLANDS
UNDERWATER
GEORGIA
RIDGES
ICEBERGS
SOUND GENERATORS
CONVERGENCE ZONES
PENINSULAS
NATURAL RESOURCES
TREMORS
SYMPOSIA
MONITORING
IMS(INTERNATIONAL MONITORING SYSTEM)
SCOTIA SEA
Antarctic
Antarctic Peninsula
Scotia Sea
The Antarctic
Antarc*
Iceberg*
Online Access:http://www.dtic.mil/docs/citations/ADA516428
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA516428
Description
Summary:The remote area of the Atlantic Ocean near the Antarctic Peninsula and the South Scotia Sea is a region where acoustic surveillance by International Monitoring System (IMS) hydrophones is at best limited. Sound originating in this area is either blocked or hindered by the South Georgia Islands (SGI) and the associated seafloor ridge system, making the region a potential hydroacoustic blind spot for IMS stations. In the spring of 2008, we successfully completed the deployment of a hydrophone array consisting of six autonomous underwater hydrophones (AUHs) in the Scotia Sea area. The array configuration is optimum to study sound propagation through the Antarctic Convergence Zone (ACZ), as well as acoustic blockage and reflection caused by islands and associated seafloor topography. Regional seismo-acoustic signals and episodic harmonic tremor from large icebergs will be utilized as natural sound sources. Published in the Proceedings of the 30th Monitoring Research Review: Ground-Based Nuclear Explosion Monitoring Technologies, 23-25 Sep 2008, Portsmouth, VA sponsored by the National Nuclear Security Administration (NNSA) and the Air Force Research Laboratory (AFRL). The original document contains color images.

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