A study of valley-side slope asymmetry based on the application of GIS analysis: Alexander Island, Antarctica
Geographic Information System (GIS) data from southern Alexander Island were used to evaluate valley asymmetry from an area where ground observations had suggested that south facing slopes were steeper than north facing. Using digital elevation modelling (DEM), data were collected from 2° and 10° ar...
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Language: | English |
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Cambridge University Press (CUP)
2000
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Online Access: | http://dx.doi.org/10.1017/s0954102000000559 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102000000559 |
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crcambridgeupr:10.1017/s0954102000000559 2024-03-03T08:36:27+00:00 A study of valley-side slope asymmetry based on the application of GIS analysis: Alexander Island, Antarctica Siegmund, Mike Hall, Kevin 2000 http://dx.doi.org/10.1017/s0954102000000559 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102000000559 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 12, issue 4, page 471-476 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2000 crcambridgeupr https://doi.org/10.1017/s0954102000000559 2024-02-08T08:37:42Z Geographic Information System (GIS) data from southern Alexander Island were used to evaluate valley asymmetry from an area where ground observations had suggested that south facing slopes were steeper than north facing. Using digital elevation modelling (DEM), data were collected from 2° and 10° arcs centred on the four cardinal directions in order to determine average slope angles for a whole nunatak area (Mars Oasis). It was found that south facing slopes were significantly steeper (34°) than the north facing (28°); east and west facing slopes were each 31°. Bedrock in this area is (approximately) horizontally bedded and so valley asymmetry is considered to be due to aspect-influenced periglacial weathering processes. Article in Journal/Newspaper Alexander Island Antarc* Antarctic Science Antarctica Cambridge University Press Alexander Island ENVELOPE(-69.895,-69.895,-71.287,-71.287) Mars Oasis ENVELOPE(-68.250,-68.250,-71.879,-71.879) Antarctic Science 12 4 471 476 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Siegmund, Mike Hall, Kevin A study of valley-side slope asymmetry based on the application of GIS analysis: Alexander Island, Antarctica |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Geographic Information System (GIS) data from southern Alexander Island were used to evaluate valley asymmetry from an area where ground observations had suggested that south facing slopes were steeper than north facing. Using digital elevation modelling (DEM), data were collected from 2° and 10° arcs centred on the four cardinal directions in order to determine average slope angles for a whole nunatak area (Mars Oasis). It was found that south facing slopes were significantly steeper (34°) than the north facing (28°); east and west facing slopes were each 31°. Bedrock in this area is (approximately) horizontally bedded and so valley asymmetry is considered to be due to aspect-influenced periglacial weathering processes. |
format |
Article in Journal/Newspaper |
author |
Siegmund, Mike Hall, Kevin |
author_facet |
Siegmund, Mike Hall, Kevin |
author_sort |
Siegmund, Mike |
title |
A study of valley-side slope asymmetry based on the application of GIS analysis: Alexander Island, Antarctica |
title_short |
A study of valley-side slope asymmetry based on the application of GIS analysis: Alexander Island, Antarctica |
title_full |
A study of valley-side slope asymmetry based on the application of GIS analysis: Alexander Island, Antarctica |
title_fullStr |
A study of valley-side slope asymmetry based on the application of GIS analysis: Alexander Island, Antarctica |
title_full_unstemmed |
A study of valley-side slope asymmetry based on the application of GIS analysis: Alexander Island, Antarctica |
title_sort |
study of valley-side slope asymmetry based on the application of gis analysis: alexander island, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2000 |
url |
http://dx.doi.org/10.1017/s0954102000000559 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102000000559 |
long_lat |
ENVELOPE(-69.895,-69.895,-71.287,-71.287) ENVELOPE(-68.250,-68.250,-71.879,-71.879) |
geographic |
Alexander Island Mars Oasis |
geographic_facet |
Alexander Island Mars Oasis |
genre |
Alexander Island Antarc* Antarctic Science Antarctica |
genre_facet |
Alexander Island Antarc* Antarctic Science Antarctica |
op_source |
Antarctic Science volume 12, issue 4, page 471-476 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102000000559 |
container_title |
Antarctic Science |
container_volume |
12 |
container_issue |
4 |
container_start_page |
471 |
op_container_end_page |
476 |
_version_ |
1792506920178810880 |