Geomorphology and landforms distribution in selected ice-free areas in the South Shetland Islands, Antarctic Northern Peninsula region
Ice-free areas cover a small percentage of the land in the South Shetland Islands. However, they are significant as they contain ecosystems highly sensitive to environmental changes and are located within a region affected by global warming. These areas are dominated by periglacial, glacial, fluvial...
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ftdoajarticles:oai:doaj.org/article:ffd2762abb2848408afc6208550888a1 2023-05-15T13:59:42+02:00 Geomorphology and landforms distribution in selected ice-free areas in the South Shetland Islands, Antarctic Northern Peninsula region J. López-Martínez T. Schmid E. Serrano S. Mink A. Nieto S. Guillaso 2016-09-01T00:00:00Z https://doi.org/10.18172/cig.2965 https://doaj.org/article/ffd2762abb2848408afc6208550888a1 EN ES eng spa Universidad de La Rioja https://publicaciones.unirioja.es/ojs/index.php/cig/article/view/2965 https://doaj.org/toc/0211-6820 https://doaj.org/toc/1697-9540 0211-6820 1697-9540 doi:10.18172/cig.2965 https://doaj.org/article/ffd2762abb2848408afc6208550888a1 Cuadernos de Investigación Geográfica, Vol 42, Iss 2, Pp 435-455 (2016) glacial periglacial coastal geomorphological mapping remote sensing antarctica Geography (General) G1-922 article 2016 ftdoajarticles https://doi.org/10.18172/cig.2965 2022-12-31T07:28:09Z Ice-free areas cover a small percentage of the land in the South Shetland Islands. However, they are significant as they contain ecosystems highly sensitive to environmental changes and are located within a region affected by global warming. These areas are dominated by periglacial, glacial, fluvial, and coastal processes and landforms, where permafrost is often present. Soil development is observed although vegetation cover is sparse and closely related to the geomorphology. The mapping and monitoring of ice-free areas is important as they are highly sensitive to climate change. The objective of this study was to characterize and map surface landforms in ice-free areas using traditional mapping methods as well as advanced remote sensing techniques. Geomorphological and topographical maps were initially obtained through field measurements and observations, and complemented with existing aerial photography at scales between 1:2000 and 1:25000. Thereafter, satellite-borne data became available and were included in the methodology to further determine the distribution of the landforms. In the Antarctic environment, Synthetic Aperture Radar (SAR) provides the most reliable images as data can be obtained in any weather conditions as well as during the day and night. Fully polarimetric SAR RADARSAT-2 were used to determine seven different terrain classes representing surface landforms in ice-free areas around Maxwell Bay (King George Island). The SAR remote sensing techniques were successfully applied to identify different periglacial, fluvial, glacial, coastal, as well as lithological landforms. Field data from Fildes Peninsula were used to train a supervised classifier to map further areas around Maxwell Bay. In this case, the ice-free areas around Maxwell Bay clearly show the dominance of periglacial landforms and processes. Therefore, these techniques can be used to compare past and future results and to monitor areas affected by changing environmental factors and increasing human activities. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice King George Island Maxwell Bay permafrost South Shetland Islands Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic King George Island South Shetland Islands Fildes ENVELOPE(-58.817,-58.817,-62.217,-62.217) Fildes peninsula ENVELOPE(-58.948,-58.948,-62.182,-62.182) Maxwell Bay ENVELOPE(-58.859,-58.859,-62.223,-62.223) Cuadernos de Investigación Geográfica 42 2 435 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Spanish |
topic |
glacial periglacial coastal geomorphological mapping remote sensing antarctica Geography (General) G1-922 |
spellingShingle |
glacial periglacial coastal geomorphological mapping remote sensing antarctica Geography (General) G1-922 J. López-Martínez T. Schmid E. Serrano S. Mink A. Nieto S. Guillaso Geomorphology and landforms distribution in selected ice-free areas in the South Shetland Islands, Antarctic Northern Peninsula region |
topic_facet |
glacial periglacial coastal geomorphological mapping remote sensing antarctica Geography (General) G1-922 |
description |
Ice-free areas cover a small percentage of the land in the South Shetland Islands. However, they are significant as they contain ecosystems highly sensitive to environmental changes and are located within a region affected by global warming. These areas are dominated by periglacial, glacial, fluvial, and coastal processes and landforms, where permafrost is often present. Soil development is observed although vegetation cover is sparse and closely related to the geomorphology. The mapping and monitoring of ice-free areas is important as they are highly sensitive to climate change. The objective of this study was to characterize and map surface landforms in ice-free areas using traditional mapping methods as well as advanced remote sensing techniques. Geomorphological and topographical maps were initially obtained through field measurements and observations, and complemented with existing aerial photography at scales between 1:2000 and 1:25000. Thereafter, satellite-borne data became available and were included in the methodology to further determine the distribution of the landforms. In the Antarctic environment, Synthetic Aperture Radar (SAR) provides the most reliable images as data can be obtained in any weather conditions as well as during the day and night. Fully polarimetric SAR RADARSAT-2 were used to determine seven different terrain classes representing surface landforms in ice-free areas around Maxwell Bay (King George Island). The SAR remote sensing techniques were successfully applied to identify different periglacial, fluvial, glacial, coastal, as well as lithological landforms. Field data from Fildes Peninsula were used to train a supervised classifier to map further areas around Maxwell Bay. In this case, the ice-free areas around Maxwell Bay clearly show the dominance of periglacial landforms and processes. Therefore, these techniques can be used to compare past and future results and to monitor areas affected by changing environmental factors and increasing human activities. |
format |
Article in Journal/Newspaper |
author |
J. López-Martínez T. Schmid E. Serrano S. Mink A. Nieto S. Guillaso |
author_facet |
J. López-Martínez T. Schmid E. Serrano S. Mink A. Nieto S. Guillaso |
author_sort |
J. López-Martínez |
title |
Geomorphology and landforms distribution in selected ice-free areas in the South Shetland Islands, Antarctic Northern Peninsula region |
title_short |
Geomorphology and landforms distribution in selected ice-free areas in the South Shetland Islands, Antarctic Northern Peninsula region |
title_full |
Geomorphology and landforms distribution in selected ice-free areas in the South Shetland Islands, Antarctic Northern Peninsula region |
title_fullStr |
Geomorphology and landforms distribution in selected ice-free areas in the South Shetland Islands, Antarctic Northern Peninsula region |
title_full_unstemmed |
Geomorphology and landforms distribution in selected ice-free areas in the South Shetland Islands, Antarctic Northern Peninsula region |
title_sort |
geomorphology and landforms distribution in selected ice-free areas in the south shetland islands, antarctic northern peninsula region |
publisher |
Universidad de La Rioja |
publishDate |
2016 |
url |
https://doi.org/10.18172/cig.2965 https://doaj.org/article/ffd2762abb2848408afc6208550888a1 |
long_lat |
ENVELOPE(-58.817,-58.817,-62.217,-62.217) ENVELOPE(-58.948,-58.948,-62.182,-62.182) ENVELOPE(-58.859,-58.859,-62.223,-62.223) |
geographic |
Antarctic The Antarctic King George Island South Shetland Islands Fildes Fildes peninsula Maxwell Bay |
geographic_facet |
Antarctic The Antarctic King George Island South Shetland Islands Fildes Fildes peninsula Maxwell Bay |
genre |
Antarc* Antarctic Antarctica Ice King George Island Maxwell Bay permafrost South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctica Ice King George Island Maxwell Bay permafrost South Shetland Islands |
op_source |
Cuadernos de Investigación Geográfica, Vol 42, Iss 2, Pp 435-455 (2016) |
op_relation |
https://publicaciones.unirioja.es/ojs/index.php/cig/article/view/2965 https://doaj.org/toc/0211-6820 https://doaj.org/toc/1697-9540 0211-6820 1697-9540 doi:10.18172/cig.2965 https://doaj.org/article/ffd2762abb2848408afc6208550888a1 |
op_doi |
https://doi.org/10.18172/cig.2965 |
container_title |
Cuadernos de Investigación Geográfica |
container_volume |
42 |
container_issue |
2 |
container_start_page |
435 |
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1766268471771922432 |