COMPARISON BETWEEN MEASURED AND THEORETICAL TEMPERATURE PROFILES OF THE CAMP CENTURY, GREENLAND, BOREHOLE.
Steady-state temperature profiles are calculated for the borehole drilled through the Greenland ice sheet at Camp Century. The profiles are found by modifying Robin's theory through the addition of several correction terms. One of these terms is the internal heating arising from creep deformati...
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ftdtic:AD0671626 2023-05-15T16:25:43+02:00 COMPARISON BETWEEN MEASURED AND THEORETICAL TEMPERATURE PROFILES OF THE CAMP CENTURY, GREENLAND, BOREHOLE. Weertman,J. COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H 1968-05 text/html http://www.dtic.mil/docs/citations/AD0671626 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0671626 en eng http://www.dtic.mil/docs/citations/AD0671626 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Snow Ice and Permafrost (*ICE TEMPERATURE) (*GLACIERS *GREENLAND) GLACIERS NUMERICAL METHODS AND PROCEDURES VELOCITY INTEGRALS THEORY CREEP DEFORMATION WELL LOGGING GEOPHYSICAL PROSPECTING MEASUREMENT GREENLAND ICE CAP Text 1968 ftdtic 2016-02-18T21:06:31Z Steady-state temperature profiles are calculated for the borehole drilled through the Greenland ice sheet at Camp Century. The profiles are found by modifying Robin's theory through the addition of several correction terms. One of these terms is the internal heating arising from creep deformation. The importance of this term was emphasized by Lliboutry. The new theoretical profiles do not differ appreciably from the profile derived from Robin's theory. The theoretical profiles do differ substantially from the Camp Century profile measured by Hansen. It is concluded that Hansen's observations are evidence that factors such as accumulation rate and the upper surface temperature are not in a long-term steady-state condition. Better agreement between theoretical and measured curves is obtained if it is assumed that the accumulation rate was about 40% smaller in the past and that the mean annual surface temperature varied by about 0.5C over the past 1000 years. (Author) Text Greenland Ice Ice cap Ice Sheet permafrost Defense Technical Information Center: DTIC Technical Reports database Greenland |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost (*ICE TEMPERATURE) (*GLACIERS *GREENLAND) GLACIERS NUMERICAL METHODS AND PROCEDURES VELOCITY INTEGRALS THEORY CREEP DEFORMATION WELL LOGGING GEOPHYSICAL PROSPECTING MEASUREMENT GREENLAND ICE CAP |
spellingShingle |
Snow Ice and Permafrost (*ICE TEMPERATURE) (*GLACIERS *GREENLAND) GLACIERS NUMERICAL METHODS AND PROCEDURES VELOCITY INTEGRALS THEORY CREEP DEFORMATION WELL LOGGING GEOPHYSICAL PROSPECTING MEASUREMENT GREENLAND ICE CAP Weertman,J. COMPARISON BETWEEN MEASURED AND THEORETICAL TEMPERATURE PROFILES OF THE CAMP CENTURY, GREENLAND, BOREHOLE. |
topic_facet |
Snow Ice and Permafrost (*ICE TEMPERATURE) (*GLACIERS *GREENLAND) GLACIERS NUMERICAL METHODS AND PROCEDURES VELOCITY INTEGRALS THEORY CREEP DEFORMATION WELL LOGGING GEOPHYSICAL PROSPECTING MEASUREMENT GREENLAND ICE CAP |
description |
Steady-state temperature profiles are calculated for the borehole drilled through the Greenland ice sheet at Camp Century. The profiles are found by modifying Robin's theory through the addition of several correction terms. One of these terms is the internal heating arising from creep deformation. The importance of this term was emphasized by Lliboutry. The new theoretical profiles do not differ appreciably from the profile derived from Robin's theory. The theoretical profiles do differ substantially from the Camp Century profile measured by Hansen. It is concluded that Hansen's observations are evidence that factors such as accumulation rate and the upper surface temperature are not in a long-term steady-state condition. Better agreement between theoretical and measured curves is obtained if it is assumed that the accumulation rate was about 40% smaller in the past and that the mean annual surface temperature varied by about 0.5C over the past 1000 years. (Author) |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H |
format |
Text |
author |
Weertman,J. |
author_facet |
Weertman,J. |
author_sort |
Weertman,J. |
title |
COMPARISON BETWEEN MEASURED AND THEORETICAL TEMPERATURE PROFILES OF THE CAMP CENTURY, GREENLAND, BOREHOLE. |
title_short |
COMPARISON BETWEEN MEASURED AND THEORETICAL TEMPERATURE PROFILES OF THE CAMP CENTURY, GREENLAND, BOREHOLE. |
title_full |
COMPARISON BETWEEN MEASURED AND THEORETICAL TEMPERATURE PROFILES OF THE CAMP CENTURY, GREENLAND, BOREHOLE. |
title_fullStr |
COMPARISON BETWEEN MEASURED AND THEORETICAL TEMPERATURE PROFILES OF THE CAMP CENTURY, GREENLAND, BOREHOLE. |
title_full_unstemmed |
COMPARISON BETWEEN MEASURED AND THEORETICAL TEMPERATURE PROFILES OF THE CAMP CENTURY, GREENLAND, BOREHOLE. |
title_sort |
comparison between measured and theoretical temperature profiles of the camp century, greenland, borehole. |
publishDate |
1968 |
url |
http://www.dtic.mil/docs/citations/AD0671626 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0671626 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Ice cap Ice Sheet permafrost |
genre_facet |
Greenland Ice Ice cap Ice Sheet permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0671626 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766014529727102976 |