Mooring Operations for Thin-Ice Arctic Acoustic Window (THAAW) Project

The Arctic Ocean is currently undergoing dramatic changes, including reductions in the extent and thickness of the ice cover and extensive warming of the intermediate layers. The multiyear ice is melting. Ice keels are getting smaller. With more open water, the internal wave energy level and therefo...

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Bibliographic Details
Main Author: Kemp, John N
Other Authors: WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF APPLIED OCEAN PHYSICS AND ENGINEERING
Format: Text
Language:English
Published: 2015
Subjects:
Submarine Engineering
Acoustic Detection and Detectors
*ARCTIC OCEAN
*MOORING
*SONAR RECEIVERS
AMBIENT NOISE
OCEAN BOTTOM
SEA ICE
UNDERWATER ACOUSTICS
THAAW(THIN ICE ARCTIC ACOUSTIC WINDOW)
DVLA(DISTRIBUTED VERTICAL LINE ARRAY)
Arctic
Arctic Ocean
North Pole
Scripps
Sea ice
Online Access:http://www.dtic.mil/docs/citations/ADA627389
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA627389
Description
Summary:The Arctic Ocean is currently undergoing dramatic changes, including reductions in the extent and thickness of the ice cover and extensive warming of the intermediate layers. The multiyear ice is melting. Ice keels are getting smaller. With more open water, the internal wave energy level and therefore acoustic volume scattering are likely increasing, at least during summer. What was learned about acoustic propagation and ambient noise in the Arctic during the Cold War is now obsolete. The long-term objectives of this research program are to understand the effects of changing Arctic conditions on low-frequency, deep-water propagation and on the low-frequency ambient noise field. The goal is to determine the fundamental limits to signal processing in the Arctic imposed by ocean and ice processes. At the request of ONR, the Woods Hole Oceanographic Institution (WHOI), in collaboration with Dr. Peter Worcester at the Scripps Institution of Oceanography, will deploy a Distributed Vertical Line Array (DVLA) receiver near the North Pole. The DVLA will be deployed from ice camp Barneo in April 2013 and recovered from Barneo in the spring of 2014. ONR BAA-13-001. The original document contains color images.

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