An error in ice-temperature measurement
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 bott...
Published in: | Journal of Glaciology |
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International Glaciological Society
1977
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Online Access: | http://nora.nerc.ac.uk/id/eprint/525589/ https://doi.org/10.3189/S0022143000021419 |
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ftnerc:oai:nora.nerc.ac.uk:525589 2023-05-15T16:57:27+02:00 An error in ice-temperature measurement Sanderson, T.J.O. 1977 http://nora.nerc.ac.uk/id/eprint/525589/ https://doi.org/10.3189/S0022143000021419 unknown International Glaciological Society Sanderson, T.J.O. 1977 An error in ice-temperature measurement. Journal of Glaciology, 18 (79). 329-333. https://doi.org/10.3189/S0022143000021419 <https://doi.org/10.3189/S0022143000021419> Publication - Article PeerReviewed 1977 ftnerc https://doi.org/10.3189/S0022143000021419 2023-02-04T19:49:28Z 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 —0.6aU 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 Natural Environment Research Council: NERC Open Research Archive Journal of Glaciology 18 79 329 333 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
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 —0.6aU 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. |
spellingShingle |
Sanderson, T.J.O. An error in ice-temperature measurement |
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 |
International Glaciological Society |
publishDate |
1977 |
url |
http://nora.nerc.ac.uk/id/eprint/525589/ https://doi.org/10.3189/S0022143000021419 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_relation |
Sanderson, T.J.O. 1977 An error in ice-temperature measurement. Journal of Glaciology, 18 (79). 329-333. https://doi.org/10.3189/S0022143000021419 <https://doi.org/10.3189/S0022143000021419> |
op_doi |
https://doi.org/10.3189/S0022143000021419 |
container_title |
Journal of Glaciology |
container_volume |
18 |
container_issue |
79 |
container_start_page |
329 |
op_container_end_page |
333 |
_version_ |
1766049009740283904 |