Soil and permafrost in the Ross Sea region of Antarctica: stable or dynamic?
Soils in the Ross Sea Region of Antarctica generally comprise a surface desert pavement and a seasonally thawed active layer over permafrost. Most soils are formed on regolith such as glacial till or colluvium. Mean annual air temperatures range from -18°C to -24°C with low precipitation. The active...
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Universidad de La Rioja
2016
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Online Access: | https://doi.org/10.18172/cig.2923 https://doaj.org/article/691cbc0fa0964a4d864c7d98aabb469c |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:691cbc0fa0964a4d864c7d98aabb469c 2023-05-15T13:47:17+02:00 Soil and permafrost in the Ross Sea region of Antarctica: stable or dynamic? M. R. Balks T. A. O’Neill 2016-09-01 https://doi.org/10.18172/cig.2923 https://doaj.org/article/691cbc0fa0964a4d864c7d98aabb469c en es eng spa Universidad de La Rioja 0211-6820 1697-9540 doi:10.18172/cig.2923 https://doaj.org/article/691cbc0fa0964a4d864c7d98aabb469c undefined Cuadernos de Investigación Geográfica, Vol 42, Iss 2, Pp 415-434 (2016) cryosol gelisol soil temperature geomorphic processes geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2016 fttriple https://doi.org/10.18172/cig.2923 2023-01-22T19:28:45Z Soils in the Ross Sea Region of Antarctica generally comprise a surface desert pavement and a seasonally thawed active layer over permafrost. Most soils are formed on regolith such as glacial till or colluvium. Mean annual air temperatures range from -18°C to -24°C with low precipitation. The active layer ranges in depth from minimal in higher altitude, colder sites, to near 1 m deep at warmer coastal sites in the northern part of the region. Underlying permafrost may be ice-cemented, or dry with no ice cement. In some areas ice-cored moraine occurs where there is a large body of ice within the subsoil permafrost. Two examples of active gully/fan -forming events, one at Cape Evans and one at Lake Vanda are described. At the Cape Evans event water from a small lake thawed and came into contact with the ice in the underlying patterned ground ice-wedge causing the ice-wedge to melt and extensive gully erosion to occur. A fan-building event near Lake Vanda in the Wright Valley resulted in erosive and depositional features covering a horizontal distance of about 3 km and an altitudinal range of about 1400 m. Such occasional events, can be attributed to warmer than average summers, and were first described in the Ross Sea Region in the 1970s. The Cape Evans and Lake Vanda events are examples of active, rapid, landscape processes and show that landscapes are not as static as is often assumed. Article in Journal/Newspaper Antarc* Antarctica Ice permafrost Ross Sea wedge* Unknown Cape Evans ENVELOPE(161.550,161.550,-75.100,-75.100) Lake Vanda ENVELOPE(161.600,161.600,-77.517,-77.517) Ross Sea Vanda ENVELOPE(161.550,161.550,-77.533,-77.533) Wright Valley ENVELOPE(161.833,161.833,-77.517,-77.517) Cuadernos de Investigación Geográfica 42 2 415 434 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English Spanish |
topic |
cryosol gelisol soil temperature geomorphic processes geo envir |
spellingShingle |
cryosol gelisol soil temperature geomorphic processes geo envir M. R. Balks T. A. O’Neill Soil and permafrost in the Ross Sea region of Antarctica: stable or dynamic? |
topic_facet |
cryosol gelisol soil temperature geomorphic processes geo envir |
description |
Soils in the Ross Sea Region of Antarctica generally comprise a surface desert pavement and a seasonally thawed active layer over permafrost. Most soils are formed on regolith such as glacial till or colluvium. Mean annual air temperatures range from -18°C to -24°C with low precipitation. The active layer ranges in depth from minimal in higher altitude, colder sites, to near 1 m deep at warmer coastal sites in the northern part of the region. Underlying permafrost may be ice-cemented, or dry with no ice cement. In some areas ice-cored moraine occurs where there is a large body of ice within the subsoil permafrost. Two examples of active gully/fan -forming events, one at Cape Evans and one at Lake Vanda are described. At the Cape Evans event water from a small lake thawed and came into contact with the ice in the underlying patterned ground ice-wedge causing the ice-wedge to melt and extensive gully erosion to occur. A fan-building event near Lake Vanda in the Wright Valley resulted in erosive and depositional features covering a horizontal distance of about 3 km and an altitudinal range of about 1400 m. Such occasional events, can be attributed to warmer than average summers, and were first described in the Ross Sea Region in the 1970s. The Cape Evans and Lake Vanda events are examples of active, rapid, landscape processes and show that landscapes are not as static as is often assumed. |
format |
Article in Journal/Newspaper |
author |
M. R. Balks T. A. O’Neill |
author_facet |
M. R. Balks T. A. O’Neill |
author_sort |
M. R. Balks |
title |
Soil and permafrost in the Ross Sea region of Antarctica: stable or dynamic? |
title_short |
Soil and permafrost in the Ross Sea region of Antarctica: stable or dynamic? |
title_full |
Soil and permafrost in the Ross Sea region of Antarctica: stable or dynamic? |
title_fullStr |
Soil and permafrost in the Ross Sea region of Antarctica: stable or dynamic? |
title_full_unstemmed |
Soil and permafrost in the Ross Sea region of Antarctica: stable or dynamic? |
title_sort |
soil and permafrost in the ross sea region of antarctica: stable or dynamic? |
publisher |
Universidad de La Rioja |
publishDate |
2016 |
url |
https://doi.org/10.18172/cig.2923 https://doaj.org/article/691cbc0fa0964a4d864c7d98aabb469c |
long_lat |
ENVELOPE(161.550,161.550,-75.100,-75.100) ENVELOPE(161.600,161.600,-77.517,-77.517) ENVELOPE(161.550,161.550,-77.533,-77.533) ENVELOPE(161.833,161.833,-77.517,-77.517) |
geographic |
Cape Evans Lake Vanda Ross Sea Vanda Wright Valley |
geographic_facet |
Cape Evans Lake Vanda Ross Sea Vanda Wright Valley |
genre |
Antarc* Antarctica Ice permafrost Ross Sea wedge* |
genre_facet |
Antarc* Antarctica Ice permafrost Ross Sea wedge* |
op_source |
Cuadernos de Investigación Geográfica, Vol 42, Iss 2, Pp 415-434 (2016) |
op_relation |
0211-6820 1697-9540 doi:10.18172/cig.2923 https://doaj.org/article/691cbc0fa0964a4d864c7d98aabb469c |
op_rights |
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op_doi |
https://doi.org/10.18172/cig.2923 |
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Cuadernos de Investigación Geográfica |
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42 |
container_issue |
2 |
container_start_page |
415 |
op_container_end_page |
434 |
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1766246855723712512 |