Thermal Fracturing, Underwater Ambient Noise Measurements, and Modeling

The long term goals is to understand thermally-generated ice stresses, cracking, and the resulting underice ambient noise and develop a physically-based model for these processes. Near the SHEBA field operation, collect under-ice noise data at those frequencies associated with the thermal fracturing...

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Bibliographic Details
Main Authors: Stein, Peter J., Lewis, James K.
Other Authors: SCIENTIFIC SOLUTIONS INC HOLLIS NH
Format: Text
Language:English
Published: 1998
Subjects:
Snow
Ice and Permafrost
Acoustics
Mechanics
Thermodynamics
*AMBIENT NOISE
*PACK ICE
*UNDERWATER SOUND
*THERMAL STRESSES
*CRACKING(FRACTURING)
UNDERICE
DATA ACQUISITION
ARCTIC OCEAN
ACOUSTIC WAVES
MONITORING
MODELS
THERMAL FRACTURING
ICE FLOES
Arctic
Arctic Ocean
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA534944
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA534944
Description
Summary:The long term goals is to understand thermally-generated ice stresses, cracking, and the resulting underice ambient noise and develop a physically-based model for these processes. Near the SHEBA field operation, collect under-ice noise data at those frequencies associated with the thermal fracturing of pack ice. We wish to ascertain those relationships between the thermal forcing of floes, the generation of stresses in the floes as a result of the thermal forcing, the eventual fracturing of ice in tension in the floes, and the generation and propagation of acoustical energy from the fractures into the water column. The SHEBA field data and associated under-ice noise is being utilized in determining the relationships in these processes. See also ADM002252. The original document contains color images.

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