Ice Arching and the Drift of Pack Ice through Restricted Channels

MODELS ORIGINALLY DEVELOPED TO DESCRIBE THE ARCHING AND THE MOVEMENT OF GRANULAR MATERIALS THROUGH hoppers OR CHUTES ARE APPLIED TO THE ARCHING AND DRIFT OF PACK ICE IN STRAITS AND GULFS having lengths OF 50 TO 500 KM. Verification of the usefulness of the models is attempted by making comparisons w...

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Bibliographic Details
Main Author: Sodhi, Devinder S.
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1977
Subjects:
Snow
Ice and Permafrost
*SEA ICE
*PACK ICE
CHANNELS(WATERWAYS)
BERING STRAIT
RECONNAISSANCE SATELLITES
FLOW RATE
DRIFT
AMUNDSEN GULF
ICE ARCHING
Bering Strait
Amundsen Gulf
Ice
ice pack
permafrost
Sea ice
Online Access:http://www.dtic.mil/docs/citations/ADA044218
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA044218
Description
Summary:MODELS ORIGINALLY DEVELOPED TO DESCRIBE THE ARCHING AND THE MOVEMENT OF GRANULAR MATERIALS THROUGH hoppers OR CHUTES ARE APPLIED TO THE ARCHING AND DRIFT OF PACK ICE IN STRAITS AND GULFS having lengths OF 50 TO 500 KM. Verification of the usefulness of the models is attempted by making comparisons with ice deformation patterns as observed via satellite imagery in the Bering Strait region and in Amundsen Gulf. The results are encouraging in that there is good correspondence between observed arching and lead patterns and those predicted by theory. In addition, values determined via the model for the angle of internal friction (approximately 30 deg to 35 deg) and the cohesive strength per unit thickness (approximately 2000 N/m) are similar to values obtained by other approaches. It is estimated that if the wind velocity parallel to the Bering Strait exceeds approximately 6 m/s, there will be ice flow through the strait.

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