An Error in Ice-Temperature Measurement
Abstract An analysis is made of the disturbance in conductive heat flow caused by drilling a bore hole in ice in which there is a vertical temperature gradient. The model used is that of a perfectly insulating hole placed in a linear temperature gradient; it is shown that the temperature measured at...
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Language: | English |
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Cambridge University Press (CUP)
1977
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Online Access: | http://dx.doi.org/10.1017/s0022143000021419 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000021419 |
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crcambridgeupr:10.1017/s0022143000021419 2024-03-03T08:46:01+00:00 An Error in Ice-Temperature Measurement Sanderson, T. J. O. 1977 http://dx.doi.org/10.1017/s0022143000021419 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000021419 en eng Cambridge University Press (CUP) Journal of Glaciology volume 18, issue 79, page 329-333 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1977 crcambridgeupr https://doi.org/10.1017/s0022143000021419 2024-02-08T08:40:37Z Abstract An analysis is made of the disturbance in conductive heat flow caused by drilling a bore hole in ice in which there is a vertical temperature gradient. The model used is that of a perfectly insulating hole placed in a linear temperature gradient; it is shown that the temperature measured at the bottom of the hole deviates from its value before drilling by an amount of order —0.6 aU where a is the bore-holt radius and U is the temperature gradient. The deviation takes effect in a few hours. The error is typically between 0.005 and 0.1 deg and is therefore significant only where very high accuracy is required. It should not be present in temperate glaciers, nor where the thermometer is properly frozen in, nor if temperatures are measured at the bore-hole walls far above the bottom. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 18 79 329 333 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Sanderson, T. J. O. An Error in Ice-Temperature Measurement |
topic_facet |
Earth-Surface Processes |
description |
Abstract An analysis is made of the disturbance in conductive heat flow caused by drilling a bore hole in ice in which there is a vertical temperature gradient. The model used is that of a perfectly insulating hole placed in a linear temperature gradient; it is shown that the temperature measured at the bottom of the hole deviates from its value before drilling by an amount of order —0.6 aU where a is the bore-holt radius and U is the temperature gradient. The deviation takes effect in a few hours. The error is typically between 0.005 and 0.1 deg and is therefore significant only where very high accuracy is required. It should not be present in temperate glaciers, nor where the thermometer is properly frozen in, nor if temperatures are measured at the bore-hole walls far above the bottom. |
format |
Article in Journal/Newspaper |
author |
Sanderson, T. J. O. |
author_facet |
Sanderson, T. J. O. |
author_sort |
Sanderson, T. J. O. |
title |
An Error in Ice-Temperature Measurement |
title_short |
An Error in Ice-Temperature Measurement |
title_full |
An Error in Ice-Temperature Measurement |
title_fullStr |
An Error in Ice-Temperature Measurement |
title_full_unstemmed |
An Error in Ice-Temperature Measurement |
title_sort |
error in ice-temperature measurement |
publisher |
Cambridge University Press (CUP) |
publishDate |
1977 |
url |
http://dx.doi.org/10.1017/s0022143000021419 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000021419 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 18, issue 79, page 329-333 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000021419 |
container_title |
Journal of Glaciology |
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18 |
container_issue |
79 |
container_start_page |
329 |
op_container_end_page |
333 |
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1792501826061336576 |