Soil temperatures and stability of ice-cemented ground in the McMurdo Dry Valleys, Antarctica
Year-round temperature measurements at 1600 m elevation during 1994 in the Asgard Range Antarctica, indicate that the mean annual frost point of the ice-cemented ground, 25 cm below the surface, is −21.7 ± 0.2°C and the mean annual frost point of the atmosphere is −27.5 ± 1.0°C. The corresponding me...
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Cambridge University Press (CUP)
1998
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crcambridgeupr:10.1017/s0954102098000054 2024-09-09T19:08:41+00:00 Soil temperatures and stability of ice-cemented ground in the McMurdo Dry Valleys, Antarctica McKay, Christopher P. Mellon, Michael T. Friedmann, E. Imre 1998 http://dx.doi.org/10.1017/s0954102098000054 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102098000054 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 10, issue 1, page 31-38 ISSN 0954-1020 1365-2079 journal-article 1998 crcambridgeupr https://doi.org/10.1017/s0954102098000054 2024-06-19T04:04:51Z Year-round temperature measurements at 1600 m elevation during 1994 in the Asgard Range Antarctica, indicate that the mean annual frost point of the ice-cemented ground, 25 cm below the surface, is −21.7 ± 0.2°C and the mean annual frost point of the atmosphere is −27.5 ± 1.0°C. The corresponding mean annual temperatures are −24.9°C and −23.3°C. These results imply that there is a net flux of water vapour from the ice to the atmosphere resulting in a recession of the ice-cemented ground by about 0.4–0.6 mm yr 1 . The level of the ice-cemented permafrost is about 12 cm below the level of dry permafrost. The summer air temperatures would have to increase about 7°C for thawing temperatures to just reach the top of the subsurface ice. Either subsurface ice at this location is evaporating over time or there are sporadic processes that recharge the ice and maintain equilibrium over long timescales. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Ice McMurdo Dry Valleys permafrost Cambridge University Press Asgard Range ENVELOPE(161.500,161.500,-77.617,-77.617) McMurdo Dry Valleys Antarctic Science 10 1 31 38 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Year-round temperature measurements at 1600 m elevation during 1994 in the Asgard Range Antarctica, indicate that the mean annual frost point of the ice-cemented ground, 25 cm below the surface, is −21.7 ± 0.2°C and the mean annual frost point of the atmosphere is −27.5 ± 1.0°C. The corresponding mean annual temperatures are −24.9°C and −23.3°C. These results imply that there is a net flux of water vapour from the ice to the atmosphere resulting in a recession of the ice-cemented ground by about 0.4–0.6 mm yr 1 . The level of the ice-cemented permafrost is about 12 cm below the level of dry permafrost. The summer air temperatures would have to increase about 7°C for thawing temperatures to just reach the top of the subsurface ice. Either subsurface ice at this location is evaporating over time or there are sporadic processes that recharge the ice and maintain equilibrium over long timescales. |
format |
Article in Journal/Newspaper |
author |
McKay, Christopher P. Mellon, Michael T. Friedmann, E. Imre |
spellingShingle |
McKay, Christopher P. Mellon, Michael T. Friedmann, E. Imre Soil temperatures and stability of ice-cemented ground in the McMurdo Dry Valleys, Antarctica |
author_facet |
McKay, Christopher P. Mellon, Michael T. Friedmann, E. Imre |
author_sort |
McKay, Christopher P. |
title |
Soil temperatures and stability of ice-cemented ground in the McMurdo Dry Valleys, Antarctica |
title_short |
Soil temperatures and stability of ice-cemented ground in the McMurdo Dry Valleys, Antarctica |
title_full |
Soil temperatures and stability of ice-cemented ground in the McMurdo Dry Valleys, Antarctica |
title_fullStr |
Soil temperatures and stability of ice-cemented ground in the McMurdo Dry Valleys, Antarctica |
title_full_unstemmed |
Soil temperatures and stability of ice-cemented ground in the McMurdo Dry Valleys, Antarctica |
title_sort |
soil temperatures and stability of ice-cemented ground in the mcmurdo dry valleys, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
1998 |
url |
http://dx.doi.org/10.1017/s0954102098000054 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102098000054 |
long_lat |
ENVELOPE(161.500,161.500,-77.617,-77.617) |
geographic |
Asgard Range McMurdo Dry Valleys |
geographic_facet |
Asgard Range McMurdo Dry Valleys |
genre |
Antarc* Antarctic Science Antarctica Ice McMurdo Dry Valleys permafrost |
genre_facet |
Antarc* Antarctic Science Antarctica Ice McMurdo Dry Valleys permafrost |
op_source |
Antarctic Science volume 10, issue 1, page 31-38 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102098000054 |
container_title |
Antarctic Science |
container_volume |
10 |
container_issue |
1 |
container_start_page |
31 |
op_container_end_page |
38 |
_version_ |
1809822937487769600 |