Measurements of Ultrasonic Wave Velocities in Ice Cores from Greenland and Antarctica.
Detailed ultrasonic velocity measurements were made on snow and ice cores from Greenland and Antarctica in order to study velocity anisotropy and its relationship to the petrofabric analysis of these cores. In addition, ultrasonic velocities were measured in the near-surface snow layers at Byrd Stat...
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ftdtic:AD0745904 2023-05-15T14:03:11+02:00 Measurements of Ultrasonic Wave Velocities in Ice Cores from Greenland and Antarctica. Bennett,Hugh F. MICHIGAN STATE UNIV EAST LANSING DEPT OF GEOLOGY 1972-06 text/html http://www.dtic.mil/docs/citations/AD0745904 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0745904 en eng http://www.dtic.mil/docs/citations/AD0745904 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Snow Ice and Permafrost (*ICE ULTRASONIC RADIATION) SEISMIC WAVES GREENLAND ANTARCTIC REGIONS ANISOTROPY STRUCTURAL GEOLOGY PACK ICE ACOUSTIC VELOCITY LAND ICE Text 1972 ftdtic 2016-02-19T01:52:05Z Detailed ultrasonic velocity measurements were made on snow and ice cores from Greenland and Antarctica in order to study velocity anisotropy and its relationship to the petrofabric analysis of these cores. In addition, ultrasonic velocities were measured in the near-surface snow layers at Byrd Station and South Pole Station, Antarctica, to provide a detailed velocity profile in the region of the ice sheet where the velocity is greatly influenced by the snow structure. The experimental arrangement, including the design of equipment, measurement errors, techniques, and problems encountered in the study, is discussed. The theory of wave propagation in a general anisotropic medium is reviewed and a detailed presentation of this theory, concerning transversely isotropic media, is given. A method is developed for calculating a theoretical velocity model from the petrofabric analysis of the ice cores, thus providing a means of testing the theory with field and laboratory observations. (Author) Text Antarc* Antarctic Antarctica Greenland Ice Ice Sheet permafrost South pole South pole Defense Technical Information Center: DTIC Technical Reports database Antarctic Byrd Byrd Station ENVELOPE(-119.533,-119.533,-80.017,-80.017) Greenland South Pole |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost (*ICE ULTRASONIC RADIATION) SEISMIC WAVES GREENLAND ANTARCTIC REGIONS ANISOTROPY STRUCTURAL GEOLOGY PACK ICE ACOUSTIC VELOCITY LAND ICE |
spellingShingle |
Snow Ice and Permafrost (*ICE ULTRASONIC RADIATION) SEISMIC WAVES GREENLAND ANTARCTIC REGIONS ANISOTROPY STRUCTURAL GEOLOGY PACK ICE ACOUSTIC VELOCITY LAND ICE Bennett,Hugh F. Measurements of Ultrasonic Wave Velocities in Ice Cores from Greenland and Antarctica. |
topic_facet |
Snow Ice and Permafrost (*ICE ULTRASONIC RADIATION) SEISMIC WAVES GREENLAND ANTARCTIC REGIONS ANISOTROPY STRUCTURAL GEOLOGY PACK ICE ACOUSTIC VELOCITY LAND ICE |
description |
Detailed ultrasonic velocity measurements were made on snow and ice cores from Greenland and Antarctica in order to study velocity anisotropy and its relationship to the petrofabric analysis of these cores. In addition, ultrasonic velocities were measured in the near-surface snow layers at Byrd Station and South Pole Station, Antarctica, to provide a detailed velocity profile in the region of the ice sheet where the velocity is greatly influenced by the snow structure. The experimental arrangement, including the design of equipment, measurement errors, techniques, and problems encountered in the study, is discussed. The theory of wave propagation in a general anisotropic medium is reviewed and a detailed presentation of this theory, concerning transversely isotropic media, is given. A method is developed for calculating a theoretical velocity model from the petrofabric analysis of the ice cores, thus providing a means of testing the theory with field and laboratory observations. (Author) |
author2 |
MICHIGAN STATE UNIV EAST LANSING DEPT OF GEOLOGY |
format |
Text |
author |
Bennett,Hugh F. |
author_facet |
Bennett,Hugh F. |
author_sort |
Bennett,Hugh F. |
title |
Measurements of Ultrasonic Wave Velocities in Ice Cores from Greenland and Antarctica. |
title_short |
Measurements of Ultrasonic Wave Velocities in Ice Cores from Greenland and Antarctica. |
title_full |
Measurements of Ultrasonic Wave Velocities in Ice Cores from Greenland and Antarctica. |
title_fullStr |
Measurements of Ultrasonic Wave Velocities in Ice Cores from Greenland and Antarctica. |
title_full_unstemmed |
Measurements of Ultrasonic Wave Velocities in Ice Cores from Greenland and Antarctica. |
title_sort |
measurements of ultrasonic wave velocities in ice cores from greenland and antarctica. |
publishDate |
1972 |
url |
http://www.dtic.mil/docs/citations/AD0745904 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0745904 |
long_lat |
ENVELOPE(-119.533,-119.533,-80.017,-80.017) |
geographic |
Antarctic Byrd Byrd Station Greenland South Pole |
geographic_facet |
Antarctic Byrd Byrd Station Greenland South Pole |
genre |
Antarc* Antarctic Antarctica Greenland Ice Ice Sheet permafrost South pole South pole |
genre_facet |
Antarc* Antarctic Antarctica Greenland Ice Ice Sheet permafrost South pole South pole |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0745904 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766273742610104320 |