Distribution and origin of ground ice in University Valley, McMurdo Dry Valleys, Antarctica
Abstract Ground ice is one of the most important and dynamic geologic components of permafrost; however, few studies have investigated the distribution and origin of ground ice in the McMurdo Dry Valleys of Antarctica. In this study, ice-bearing permafrost cores were collected from 18 sites in Unive...
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crcambridgeupr:10.1017/s0954102016000572 2024-03-03T08:39:16+00:00 Distribution and origin of ground ice in University Valley, McMurdo Dry Valleys, Antarctica Lapalme, Caitlin Lacelle, Denis Pollard, Wayne Fisher, David Davila, Alfonso Mckay, Christopher P. 2016 http://dx.doi.org/10.1017/s0954102016000572 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102016000572 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 29, issue 2, page 183-198 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2016 crcambridgeupr https://doi.org/10.1017/s0954102016000572 2024-02-08T08:36:44Z Abstract Ground ice is one of the most important and dynamic geologic components of permafrost; however, few studies have investigated the distribution and origin of ground ice in the McMurdo Dry Valleys of Antarctica. In this study, ice-bearing permafrost cores were collected from 18 sites in University Valley, a small hanging glacial valley in the Quartermain Mountains. Ground ice was found to be ubiquitous in the upper 2 m of permafrost soils, with excess ice contents reaching 93%, but ground ice conditions were not homogeneous. Ground ice content was variable within polygons and along the valley floor, decreasing in the centres of polygons and increasing in the shoulders of polygons towards the mouth of the valley. Ground ice also had different origins: vapour deposition, freezing of partially evaporated snow meltwater and buried glacier ice. The variability in the distribution and origin of ground ice can be attributed to ground surface temperature and moisture conditions, which separate the valley into distinct zones. Ground ice of vapour-deposition origin was predominantly situated in perennially cryotic zones, whereas ground ice formed by the freezing of evaporated snow meltwater was predominantly found in seasonally non-cryotic zones. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Ice McMurdo Dry Valleys permafrost Cambridge University Press McMurdo Dry Valleys University Valley ENVELOPE(160.667,160.667,-77.867,-77.867) Quartermain Mountains ENVELOPE(160.750,160.750,-77.850,-77.850) Antarctic Science 29 2 183 198 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Lapalme, Caitlin Lacelle, Denis Pollard, Wayne Fisher, David Davila, Alfonso Mckay, Christopher P. Distribution and origin of ground ice in University Valley, McMurdo Dry Valleys, Antarctica |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Ground ice is one of the most important and dynamic geologic components of permafrost; however, few studies have investigated the distribution and origin of ground ice in the McMurdo Dry Valleys of Antarctica. In this study, ice-bearing permafrost cores were collected from 18 sites in University Valley, a small hanging glacial valley in the Quartermain Mountains. Ground ice was found to be ubiquitous in the upper 2 m of permafrost soils, with excess ice contents reaching 93%, but ground ice conditions were not homogeneous. Ground ice content was variable within polygons and along the valley floor, decreasing in the centres of polygons and increasing in the shoulders of polygons towards the mouth of the valley. Ground ice also had different origins: vapour deposition, freezing of partially evaporated snow meltwater and buried glacier ice. The variability in the distribution and origin of ground ice can be attributed to ground surface temperature and moisture conditions, which separate the valley into distinct zones. Ground ice of vapour-deposition origin was predominantly situated in perennially cryotic zones, whereas ground ice formed by the freezing of evaporated snow meltwater was predominantly found in seasonally non-cryotic zones. |
format |
Article in Journal/Newspaper |
author |
Lapalme, Caitlin Lacelle, Denis Pollard, Wayne Fisher, David Davila, Alfonso Mckay, Christopher P. |
author_facet |
Lapalme, Caitlin Lacelle, Denis Pollard, Wayne Fisher, David Davila, Alfonso Mckay, Christopher P. |
author_sort |
Lapalme, Caitlin |
title |
Distribution and origin of ground ice in University Valley, McMurdo Dry Valleys, Antarctica |
title_short |
Distribution and origin of ground ice in University Valley, McMurdo Dry Valleys, Antarctica |
title_full |
Distribution and origin of ground ice in University Valley, McMurdo Dry Valleys, Antarctica |
title_fullStr |
Distribution and origin of ground ice in University Valley, McMurdo Dry Valleys, Antarctica |
title_full_unstemmed |
Distribution and origin of ground ice in University Valley, McMurdo Dry Valleys, Antarctica |
title_sort |
distribution and origin of ground ice in university valley, mcmurdo dry valleys, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2016 |
url |
http://dx.doi.org/10.1017/s0954102016000572 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102016000572 |
long_lat |
ENVELOPE(160.667,160.667,-77.867,-77.867) ENVELOPE(160.750,160.750,-77.850,-77.850) |
geographic |
McMurdo Dry Valleys University Valley Quartermain Mountains |
geographic_facet |
McMurdo Dry Valleys University Valley Quartermain Mountains |
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 29, issue 2, page 183-198 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102016000572 |
container_title |
Antarctic Science |
container_volume |
29 |
container_issue |
2 |
container_start_page |
183 |
op_container_end_page |
198 |
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1792494719961399296 |