Electrical Resistivity of Ice from the Antarctic Peninsula, Antarctica
Abstract Georesistivity soundings have been carried out at four sites in the Antarctic Peninsula. The objective of the work was to investigate the electrical behaviour of ice from an area where substantial melting occurs in summer and from contrasting thermal regimes. Electrical measurements made at...
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1984
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crcambridgeupr:10.1017/s0022143000006110 2023-06-11T04:06:28+02:00 Electrical Resistivity of Ice from the Antarctic Peninsula, Antarctica Reynolds, John M. Paren, J. G. 1984 http://dx.doi.org/10.1017/s0022143000006110 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000006110 en eng Cambridge University Press (CUP) Journal of Glaciology volume 30, issue 106, page 289-295 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1984 crcambridgeupr https://doi.org/10.1017/s0022143000006110 2023-05-01T18:20:57Z Abstract Georesistivity soundings have been carried out at four sites in the Antarctic Peninsula. The objective of the work was to investigate the electrical behaviour of ice from an area where substantial melting occurs in summer and from contrasting thermal regimes. Electrical measurements made at three sites along a flow line within George VI Ice Shelf reveal that: (a) the resistivity of deep ice is similar to that of other Antarctic ice shelves, (b) the resistivity of the ice-shelf surface, which is affected by the percolation and refreezing of melt water, is similar to that of deep ice and hence the ice is polar in character. A compilation of published resistivities of deep ice from polar regions shows that the range of resistivities is very narrow (0.4 –2.0) x 10 5 Ω m between –2 and – 29°C, irrespective of the physical setting and history of the ice. Typically, resistivity is within a factor of two of 80 kΩ m at –20° C with an activation energy of 0.22 eV. In contrast, the resistivity of surface ice at Wormald Ice Piedmont, where the ice is at 0°C throughout, is two orders of magnitude higher and falls at the lower end of the range of resistivities for temperate ice. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica George VI Ice Shelf Ice Shelf Ice Shelves Journal of Glaciology Cambridge University Press (via Crossref) Antarctic The Antarctic Antarctic Peninsula George VI Ice Shelf ENVELOPE(-67.840,-67.840,-71.692,-71.692) Wormald Ice Piedmont ENVELOPE(-68.070,-68.070,-67.489,-67.489) Journal of Glaciology 30 106 289 295 |
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Open Polar |
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Cambridge University Press (via Crossref) |
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English |
topic |
Earth-Surface Processes |
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Earth-Surface Processes Reynolds, John M. Paren, J. G. Electrical Resistivity of Ice from the Antarctic Peninsula, Antarctica |
topic_facet |
Earth-Surface Processes |
description |
Abstract Georesistivity soundings have been carried out at four sites in the Antarctic Peninsula. The objective of the work was to investigate the electrical behaviour of ice from an area where substantial melting occurs in summer and from contrasting thermal regimes. Electrical measurements made at three sites along a flow line within George VI Ice Shelf reveal that: (a) the resistivity of deep ice is similar to that of other Antarctic ice shelves, (b) the resistivity of the ice-shelf surface, which is affected by the percolation and refreezing of melt water, is similar to that of deep ice and hence the ice is polar in character. A compilation of published resistivities of deep ice from polar regions shows that the range of resistivities is very narrow (0.4 –2.0) x 10 5 Ω m between –2 and – 29°C, irrespective of the physical setting and history of the ice. Typically, resistivity is within a factor of two of 80 kΩ m at –20° C with an activation energy of 0.22 eV. In contrast, the resistivity of surface ice at Wormald Ice Piedmont, where the ice is at 0°C throughout, is two orders of magnitude higher and falls at the lower end of the range of resistivities for temperate ice. |
format |
Article in Journal/Newspaper |
author |
Reynolds, John M. Paren, J. G. |
author_facet |
Reynolds, John M. Paren, J. G. |
author_sort |
Reynolds, John M. |
title |
Electrical Resistivity of Ice from the Antarctic Peninsula, Antarctica |
title_short |
Electrical Resistivity of Ice from the Antarctic Peninsula, Antarctica |
title_full |
Electrical Resistivity of Ice from the Antarctic Peninsula, Antarctica |
title_fullStr |
Electrical Resistivity of Ice from the Antarctic Peninsula, Antarctica |
title_full_unstemmed |
Electrical Resistivity of Ice from the Antarctic Peninsula, Antarctica |
title_sort |
electrical resistivity of ice from the antarctic peninsula, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
1984 |
url |
http://dx.doi.org/10.1017/s0022143000006110 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000006110 |
long_lat |
ENVELOPE(-67.840,-67.840,-71.692,-71.692) ENVELOPE(-68.070,-68.070,-67.489,-67.489) |
geographic |
Antarctic The Antarctic Antarctic Peninsula George VI Ice Shelf Wormald Ice Piedmont |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula George VI Ice Shelf Wormald Ice Piedmont |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica George VI Ice Shelf Ice Shelf Ice Shelves Journal of Glaciology |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica George VI Ice Shelf Ice Shelf Ice Shelves Journal of Glaciology |
op_source |
Journal of Glaciology volume 30, issue 106, page 289-295 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000006110 |
container_title |
Journal of Glaciology |
container_volume |
30 |
container_issue |
106 |
container_start_page |
289 |
op_container_end_page |
295 |
_version_ |
1768378449026613248 |