BUBBLES AND BUBBLE PRESSURE IN ANTARCTIC GLACER ICE.

• Main Author: Gow,Anthony J.
• Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
• Format: Text
• Language: English
• Published: 1968
• Subjects: Snow; Ice and Permafrost; *GLACIERS; *ANTARCTIC REGIONS; *BUBBLES; *ICE; PRESSURE; DENSITY; MECHANICAL PROPERTIES; MEASUREMENT; LOADS(FORCES); TEMPERATURE; Antarctic; Byrd; Byrd Station; Little America; The Antarctic; Antarc*; Ice; Ice Sheet; permafrost
• Online Access: http://www.dtic.mil/docs/citations/AD0680181; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0680181

An exceptional opportunity to study changes in the pressure, distribution and structure of bubbles as a function of depth in the Antarctic ice sheet arose during the IGY (1957-58) when ice cores were obtained to depths of 308 m and 254 m at Byrd Station and Little America 5 respectively. Approximately 100 samples of ice from both locations were used to obtain fourth-place density measurements and these data, in conjunction with observations of bubble structure in thin sections of ice, have been used to accomplish the following objectives: To investigate the relationship between bubble pressure and the in situ overburden pressure and to determine, if possible, the depth at which the difference in pressures is reduced to less than 1-2 kg/sq cm. To investigate the pattern of changes in the size, shape, number and distribution of air bubbles as a function of depth in the Antarctic ice sheet. (Author)