Geomorphology and surface landforms distribution in selected ice-free areas in the South Shetland Islands, Northern Antarctic 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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ftcsic:oai:digital.csic.es:20.500.12468/389 2023-05-15T13:55:11+02:00 Geomorphology and surface landforms distribution in selected ice-free areas in the South Shetland Islands, Northern Antarctic Peninsula region López Martínez, Jerónimo Schmid, T. Serrano, E. Mink Proeck , Sandra Martina Nieto, A. Guillaso, S. Islas Shetland del Sur 2020-09-24T15:18:06Z https://hdl.handle.net/20.500.12468/389 https://doi.org/10.18172/cig.2965 en eng Universidad de La Rioja #PLACEHOLDER_PARENT_METADATA_VALUE# CTM2014-57119-R Science and Operational Applications Research Program--5169 https://publicaciones.unirioja.es/ojs/index.php/cig/article/view/2965 Cuadernos de investigación geográfica, 2016, n.42 (2), 435-455 1697-9540, http://hdl.handle.net/20.500.12468/389 https://doi.org/10.18172/cig.2965 open glacial periglacial coastal geomorphological mapping remote sensing Antarctica Postprint 2020 ftcsic https://doi.org/20.500.12468/389 https://doi.org/10.18172/cig.2965 2022-08-23T23:39:34Z 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 Departamento de ... Other/Unknown Material Antarc* Antarctic Antarctic Peninsula Antarctica Ice King George Island Maxwell Bay permafrost South Shetland Islands Digital.CSIC (Spanish National Research Council) Antarctic The Antarctic Antarctic Peninsula 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) Shetland del Sur ENVELOPE(-58.000,-58.000,-62.000,-62.000) Maxwell Bay ENVELOPE(-58.859,-58.859,-62.223,-62.223) islas Shetland del Sur ENVELOPE(-58.000,-58.000,-62.000,-62.000) Cuadernos de Investigación Geográfica 42 2 435 455 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
glacial periglacial coastal geomorphological mapping remote sensing Antarctica |
spellingShingle |
glacial periglacial coastal geomorphological mapping remote sensing Antarctica López Martínez, Jerónimo Schmid, T. Serrano, E. Mink Proeck , Sandra Martina Nieto, A. Guillaso, S. Geomorphology and surface landforms distribution in selected ice-free areas in the South Shetland Islands, Northern Antarctic Peninsula region |
topic_facet |
glacial periglacial coastal geomorphological mapping remote sensing Antarctica |
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 Departamento de ... |
format |
Other/Unknown Material |
author |
López Martínez, Jerónimo Schmid, T. Serrano, E. Mink Proeck , Sandra Martina Nieto, A. Guillaso, S. |
author_facet |
López Martínez, Jerónimo Schmid, T. Serrano, E. Mink Proeck , Sandra Martina Nieto, A. Guillaso, S. |
author_sort |
López Martínez, Jerónimo |
title |
Geomorphology and surface landforms distribution in selected ice-free areas in the South Shetland Islands, Northern Antarctic Peninsula region |
title_short |
Geomorphology and surface landforms distribution in selected ice-free areas in the South Shetland Islands, Northern Antarctic Peninsula region |
title_full |
Geomorphology and surface landforms distribution in selected ice-free areas in the South Shetland Islands, Northern Antarctic Peninsula region |
title_fullStr |
Geomorphology and surface landforms distribution in selected ice-free areas in the South Shetland Islands, Northern Antarctic Peninsula region |
title_full_unstemmed |
Geomorphology and surface landforms distribution in selected ice-free areas in the South Shetland Islands, Northern Antarctic Peninsula region |
title_sort |
geomorphology and surface landforms distribution in selected ice-free areas in the south shetland islands, northern antarctic peninsula region |
publisher |
Universidad de La Rioja |
publishDate |
2020 |
url |
https://hdl.handle.net/20.500.12468/389 https://doi.org/10.18172/cig.2965 |
op_coverage |
Islas Shetland del Sur |
long_lat |
ENVELOPE(-58.817,-58.817,-62.217,-62.217) ENVELOPE(-58.948,-58.948,-62.182,-62.182) ENVELOPE(-58.000,-58.000,-62.000,-62.000) ENVELOPE(-58.859,-58.859,-62.223,-62.223) ENVELOPE(-58.000,-58.000,-62.000,-62.000) |
geographic |
Antarctic The Antarctic Antarctic Peninsula King George Island South Shetland Islands Fildes Fildes peninsula Shetland del Sur Maxwell Bay islas Shetland del Sur |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula King George Island South Shetland Islands Fildes Fildes peninsula Shetland del Sur Maxwell Bay islas Shetland del Sur |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice King George Island Maxwell Bay permafrost South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice King George Island Maxwell Bay permafrost South Shetland Islands |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# CTM2014-57119-R Science and Operational Applications Research Program--5169 https://publicaciones.unirioja.es/ojs/index.php/cig/article/view/2965 Cuadernos de investigación geográfica, 2016, n.42 (2), 435-455 1697-9540, http://hdl.handle.net/20.500.12468/389 https://doi.org/10.18172/cig.2965 |
op_rights |
open |
op_doi |
https://doi.org/20.500.12468/389 https://doi.org/10.18172/cig.2965 |
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Cuadernos de Investigación Geográfica |
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42 |
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