Snow dunes and glazed surfaces in Antarctica: new field and remote-sensing data
AbstractAs part of the International Trans-Antarctic Scientific Expedition project, the Italian Antarctic Programme undertook two traverses from the Terra Nova station to Talos Dome and to Dome C. Along the traverses, the party carried out several tasks (drilling, glaciological and geophysical explo...
Published in: | Annals of Glaciology |
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ftopenaccessrep:oai:zenodo.org:160786 2024-05-12T07:56:24+00:00 Snow dunes and glazed surfaces in Antarctica: new field and remote-sensing data Frezzotti, Massimo Gandolfi, Stefano Marca, Floriana La Urbini, Stefano 2007-11-22 https://www.openaccessrepository.it/record/160786 https://doi.org/10.3189/172756402781817851 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/160786 doi:10.3189/172756402781817851 info:eu-repo/semantics/openAccess Earth-Surface Processes info:eu-repo/semantics/article publication-article 2007 ftopenaccessrep https://doi.org/10.3189/172756402781817851 2024-04-17T15:12:25Z AbstractAs part of the International Trans-Antarctic Scientific Expedition project, the Italian Antarctic Programme undertook two traverses from the Terra Nova station to Talos Dome and to Dome C. Along the traverses, the party carried out several tasks (drilling, glaciological and geophysical exploration). The difference in spectral response between glazed surfaces and snow makes it simple to identify these areas on visible/near-infrared satellite images. Integration of field observation and remotely sensed data allows the description of different mega-morphologic features: wide glazed surfaces, sastrugi glazed surface fields, transverse dunes and megadunes. Topography global positioning system, ground penetrating radar and detailed snow-surface surveys have been carried out, providing new information about the formation and evolution of mega-morphologic features. The extensive presence, (up to 30%) of glazed surface caused by a long hiatus in accumulation, with an accumulation rate of nil or slightly negative, has a significant impact on the surface mass balance of a wide area of the interior part of East Antarctica. The aeolian processes creating these features have important implications for the selection of optimum sites for ice coring, because orographic variations of even a few metres per kilometre have a significant impact on the snow-accumulation process. Remote-sensing surveys of aeolian macro-morphology provide a proven, high-quality method for detailed mapping of the interior of the ice sheet's prevalent wind direction and could provide a relative indication of wind intensity. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Antarctic East Antarctica Sastrugi ENVELOPE(163.683,163.683,-74.617,-74.617) Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) Annals of Glaciology 34 81 88 |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Frezzotti, Massimo Gandolfi, Stefano Marca, Floriana La Urbini, Stefano Snow dunes and glazed surfaces in Antarctica: new field and remote-sensing data |
topic_facet |
Earth-Surface Processes |
description |
AbstractAs part of the International Trans-Antarctic Scientific Expedition project, the Italian Antarctic Programme undertook two traverses from the Terra Nova station to Talos Dome and to Dome C. Along the traverses, the party carried out several tasks (drilling, glaciological and geophysical exploration). The difference in spectral response between glazed surfaces and snow makes it simple to identify these areas on visible/near-infrared satellite images. Integration of field observation and remotely sensed data allows the description of different mega-morphologic features: wide glazed surfaces, sastrugi glazed surface fields, transverse dunes and megadunes. Topography global positioning system, ground penetrating radar and detailed snow-surface surveys have been carried out, providing new information about the formation and evolution of mega-morphologic features. The extensive presence, (up to 30%) of glazed surface caused by a long hiatus in accumulation, with an accumulation rate of nil or slightly negative, has a significant impact on the surface mass balance of a wide area of the interior part of East Antarctica. The aeolian processes creating these features have important implications for the selection of optimum sites for ice coring, because orographic variations of even a few metres per kilometre have a significant impact on the snow-accumulation process. Remote-sensing surveys of aeolian macro-morphology provide a proven, high-quality method for detailed mapping of the interior of the ice sheet's prevalent wind direction and could provide a relative indication of wind intensity. |
format |
Article in Journal/Newspaper |
author |
Frezzotti, Massimo Gandolfi, Stefano Marca, Floriana La Urbini, Stefano |
author_facet |
Frezzotti, Massimo Gandolfi, Stefano Marca, Floriana La Urbini, Stefano |
author_sort |
Frezzotti, Massimo |
title |
Snow dunes and glazed surfaces in Antarctica: new field and remote-sensing data |
title_short |
Snow dunes and glazed surfaces in Antarctica: new field and remote-sensing data |
title_full |
Snow dunes and glazed surfaces in Antarctica: new field and remote-sensing data |
title_fullStr |
Snow dunes and glazed surfaces in Antarctica: new field and remote-sensing data |
title_full_unstemmed |
Snow dunes and glazed surfaces in Antarctica: new field and remote-sensing data |
title_sort |
snow dunes and glazed surfaces in antarctica: new field and remote-sensing data |
publishDate |
2007 |
url |
https://www.openaccessrepository.it/record/160786 https://doi.org/10.3189/172756402781817851 |
long_lat |
ENVELOPE(163.683,163.683,-74.617,-74.617) ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
Antarctic East Antarctica Sastrugi Talos Dome |
geographic_facet |
Antarctic East Antarctica Sastrugi Talos Dome |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/160786 doi:10.3189/172756402781817851 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3189/172756402781817851 |
container_title |
Annals of Glaciology |
container_volume |
34 |
container_start_page |
81 |
op_container_end_page |
88 |
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1798836465666359296 |