Analysis of bottom morphology of the David Glacier-Drygalski Ice Tongue, East Antarctica
AbstractData from radio-sounding measurements have been analysed to determine the ice thickness and the bottom morphology of Drygalski Ice Tongue, Antarctica. The morphology and the structure of the bottom surface has been studied through an electromagnetic interpretation. A function that includes t...
Published in: | Annals of Glaciology |
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2007
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ftopenaccessrep:oai:zenodo.org:58402 2023-05-15T13:50:37+02:00 Analysis of bottom morphology of the David Glacier-Drygalski Ice Tongue, East Antarctica I. E. Tabacco C. Bianchi M. Chiappini A. Zirizzotti E. Zuccheretti 2007-11-22 https://www.openaccessrepository.it/record/58402 https://doi.org/10.3189/172756400781820624 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/58402 doi:10.3189/172756400781820624 info:eu-repo/semantics/openAccess Earth-Surface Processes info:eu-repo/semantics/article publication-article 2007 ftopenaccessrep https://doi.org/10.3189/172756400781820624 2022-11-23T06:41:44Z AbstractData from radio-sounding measurements have been analysed to determine the ice thickness and the bottom morphology of Drygalski Ice Tongue, Antarctica. The morphology and the structure of the bottom surface has been studied through an electromagnetic interpretation. A function that includes the gain/loss due to the geometrical shape of the reflecting surfaces has been calculated. Such a function has been evaluated assuming some physical electromagnetic quantities (the temperature of the glacier, the complex dielectric permittivity of ice, sea ice and sea water). The ice-water interface shows both concave and convex faces toward the sounding system, producing a focusing or deocusing effect, detected as absolute (or relative) amplitude variation in the echo signal. It is shown that the calculated function follows quite well the observed bottom rippled surface of the glacier tongue estimated from the time-arrival measurements of the echo signal. Article in Journal/Newspaper Antarc* Antarctica David Glacier East Antarctica Sea ice Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository East Antarctica Drygalski ENVELOPE(-61.000,-61.000,-64.717,-64.717) Drygalski Ice Tongue ENVELOPE(163.500,163.500,-75.400,-75.400) David Glacier ENVELOPE(160.000,160.000,-75.333,-75.333) Annals of Glaciology 30 47 51 |
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 I. E. Tabacco C. Bianchi M. Chiappini A. Zirizzotti E. Zuccheretti Analysis of bottom morphology of the David Glacier-Drygalski Ice Tongue, East Antarctica |
topic_facet |
Earth-Surface Processes |
description |
AbstractData from radio-sounding measurements have been analysed to determine the ice thickness and the bottom morphology of Drygalski Ice Tongue, Antarctica. The morphology and the structure of the bottom surface has been studied through an electromagnetic interpretation. A function that includes the gain/loss due to the geometrical shape of the reflecting surfaces has been calculated. Such a function has been evaluated assuming some physical electromagnetic quantities (the temperature of the glacier, the complex dielectric permittivity of ice, sea ice and sea water). The ice-water interface shows both concave and convex faces toward the sounding system, producing a focusing or deocusing effect, detected as absolute (or relative) amplitude variation in the echo signal. It is shown that the calculated function follows quite well the observed bottom rippled surface of the glacier tongue estimated from the time-arrival measurements of the echo signal. |
format |
Article in Journal/Newspaper |
author |
I. E. Tabacco C. Bianchi M. Chiappini A. Zirizzotti E. Zuccheretti |
author_facet |
I. E. Tabacco C. Bianchi M. Chiappini A. Zirizzotti E. Zuccheretti |
author_sort |
I. E. Tabacco |
title |
Analysis of bottom morphology of the David Glacier-Drygalski Ice Tongue, East Antarctica |
title_short |
Analysis of bottom morphology of the David Glacier-Drygalski Ice Tongue, East Antarctica |
title_full |
Analysis of bottom morphology of the David Glacier-Drygalski Ice Tongue, East Antarctica |
title_fullStr |
Analysis of bottom morphology of the David Glacier-Drygalski Ice Tongue, East Antarctica |
title_full_unstemmed |
Analysis of bottom morphology of the David Glacier-Drygalski Ice Tongue, East Antarctica |
title_sort |
analysis of bottom morphology of the david glacier-drygalski ice tongue, east antarctica |
publishDate |
2007 |
url |
https://www.openaccessrepository.it/record/58402 https://doi.org/10.3189/172756400781820624 |
long_lat |
ENVELOPE(-61.000,-61.000,-64.717,-64.717) ENVELOPE(163.500,163.500,-75.400,-75.400) ENVELOPE(160.000,160.000,-75.333,-75.333) |
geographic |
East Antarctica Drygalski Drygalski Ice Tongue David Glacier |
geographic_facet |
East Antarctica Drygalski Drygalski Ice Tongue David Glacier |
genre |
Antarc* Antarctica David Glacier East Antarctica Sea ice |
genre_facet |
Antarc* Antarctica David Glacier East Antarctica Sea ice |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/58402 doi:10.3189/172756400781820624 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3189/172756400781820624 |
container_title |
Annals of Glaciology |
container_volume |
30 |
container_start_page |
47 |
op_container_end_page |
51 |
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1766253775690924032 |