Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/5756
Title: Bubble coalescence in ice as a tool for the study of its deformation history
Authors: Northwestern University (Evanston, Ill.). Dept. of Geology.
Northwestern University (Evanston, Ill.). Dept. of Materials Science.
Weertman, Johannes.
Keywords: Ice
Ice shelf
Ice sheet
Glaciers
Glacier ice
Coalescing
Deformation
Bubbles
Shear strain
Strain rate
Strains
EPOLAR
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Research report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 251.
Description: Research Report
Abstract: An analysis is made of the rate of bubble coalescence in a deforming ice mass. A total strain of at least 8 is required before appreciable coalescence occurs, The analysis has.been applied to deforming ice shelves and ice sheets. No appreciable coalescence is expected in ice shelves but coalescence should occur in ice sheets (or glaciers) if the shear strain rate at the bottom surface is of the order of 0.075/yr or larger. Measurements of bubble concentration are capable of setting limits on paleo-strain rates of the present ice sheets. Bubble migration down temperature gradients presents complications to the study of bubble coalescence.
URI: http://hdl.handle.net/11681/5756
Appears in Collections:CRREL Research Report

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