Accession Number:

ADA516428

Title:

Deployment of Autonomous Hydrophone Array in the Scotia Sea

Descriptive Note:

Conference paper

Corporate Author:

OREGON STATE UNIV NEWPORT HATFIELD MARINE SCIENCE CENTER

Personal Author(s):

• Mastsumoto, Haru
• Bohnenstiehl, Del R.
• Dziak, Robert P.
• Embley, Robert W.
• Park, Minkyu

Report Date:

2008-09-01

Pagination or Media Count:

7.0

Abstract:

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.

Descriptors:

• *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

Subject Categories:

• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE