Development of a Sea-Ice Thickness Gage. An Attempt to use Shear Waves.

An experimental apparatus for the measurement of the thickness of sea-ice by the use of a shear wave reflection technique was designed and constructed. The apparatus was tested extensively in the Arctic during the summer of 1972. A portion of the apparatus, the horizontal impact source, produced rel...

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Bibliographic Details
Main Authors: Getman,James H., Moffett,Mark B.
Other Authors: RHODE ISLAND UNIV KINGSTON DEPT OF OCEAN ENGINEERING
Format: Text
Language:English
Published: 1973
Subjects:
Physical and Dynamic Oceanography
Snow
Ice and Permafrost
*ACOUSTIC MEASUREMENT
*SEA ICE
*OCEANOGRAPHIC EQUIPMENT
SHEAR PROPERTIES
THICKNESS
EXPERIMENTAL DESIGN
TEST METHODS
REFLECTION
RELIABILITY
SOUND WAVES
ARCTIC REGIONS
DOT/4IZ/IC
Arctic
Gage
Ice
permafrost
Sea ice
Online Access:http://www.dtic.mil/docs/citations/ADA006599
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA006599
Description
Summary:An experimental apparatus for the measurement of the thickness of sea-ice by the use of a shear wave reflection technique was designed and constructed. The apparatus was tested extensively in the Arctic during the summer of 1972. A portion of the apparatus, the horizontal impact source, produced reliable and repeatable excitation of the ice. Unfortunately, the measurement of the thickness of sea ice by the use of a shear wave reflection technique was not as simple as was anticipated, primarily due to the difficulty of properly exciting the ice and to the mode conversion of the acoustic energy by external and internal features of the ice.

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