BUBBLE COALESCENCE IN ICE AS A TOOL FOR THE STUDY OF ITS DEFORMATION HISTORY.

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...

Full description

Bibliographic Details
Main Author: Weertman,Johannes
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Format: Text
Language:English
Published: 1968
Subjects:
Snow
Ice and Permafrost
Mechanics
(*ICE
CREEP)
HISTORY
BUBBLES
GLACIERS
AIR
THICKNESS
STRAIN(MECHANICS)
MATHEMATICAL ANALYSIS
THEORY
STRESSES
MEASUREMENT
DEFORMATION
Ice
Ice Shelves
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0682723
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0682723
Description
Summary: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. (Author)

Similar Items