Electromagnetic ice absorption rate at Dome C, Antarctica
AbstractRadio-echo sounding (RES) is a radar technique widely employed in Antarctica and Greenland to define bedrock topography but, over the last decade, it has also played an important role in subglacial lake exploration and hydrogeological studies at the bedrock/ice interface. In recent studies,...
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ftopenaccessrep:oai:zenodo.org:122007 2023-10-29T02:31:25+01:00 Electromagnetic ice absorption rate at Dome C, Antarctica Achille Zirizzotti James A. Baskaradas Stefano Urbini Lili Cafarella 2014-01-01 https://www.openaccessrepository.it/record/122007 https://doi.org/10.3189/2014jog13j208 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/122007 doi:10.3189/2014jog13j208 info:eu-repo/semantics/openAccess NEANIAS Atmospheric Research Community Earth-Surface Processes info:eu-repo/semantics/article publication-article 2014 ftopenaccessrep https://doi.org/10.3189/2014jog13j208 2023-10-03T22:17:06Z AbstractRadio-echo sounding (RES) is a radar technique widely employed in Antarctica and Greenland to define bedrock topography but, over the last decade, it has also played an important role in subglacial lake exploration and hydrogeological studies at the bedrock/ice interface. In recent studies, bedrock characterization has been improved through analysis of radar power echoes to evaluate the electromagnetic (EM) properties of the interface and allow the distinction between wet and dry interfaces. The RES received signal power depends on ice absorption and bedrock reflectivity, which is closely linked to the specific physical condition of the bedrock. In this paper, an evaluation of EM ice absorption was conducted starting from RES measurements collected over subglacial lakes in Antarctica. The idea was to calculate ice absorption starting from the radar equation in the case of subglacial lakes, where the EM reflectivity value is considered a known constant. These values were compared with those obtained from analysis of ice-core dielectric profiles from EPICA ice-core drilling data. Our analysis reveals that the ice absorption rate calculated from RES measurements has an average value of 7.2 dB km−1, and it appears constant, independent of the subglacial lake depth in different zones of the Dome C area. Article in Journal/Newspaper Antarc* Antarctica EPICA Greenland ice core Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Journal of Glaciology 60 223 849 854 |
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Open Polar |
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Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
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ftopenaccessrep |
language |
English |
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NEANIAS Atmospheric Research Community Earth-Surface Processes |
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NEANIAS Atmospheric Research Community Earth-Surface Processes Achille Zirizzotti James A. Baskaradas Stefano Urbini Lili Cafarella Electromagnetic ice absorption rate at Dome C, Antarctica |
topic_facet |
NEANIAS Atmospheric Research Community Earth-Surface Processes |
description |
AbstractRadio-echo sounding (RES) is a radar technique widely employed in Antarctica and Greenland to define bedrock topography but, over the last decade, it has also played an important role in subglacial lake exploration and hydrogeological studies at the bedrock/ice interface. In recent studies, bedrock characterization has been improved through analysis of radar power echoes to evaluate the electromagnetic (EM) properties of the interface and allow the distinction between wet and dry interfaces. The RES received signal power depends on ice absorption and bedrock reflectivity, which is closely linked to the specific physical condition of the bedrock. In this paper, an evaluation of EM ice absorption was conducted starting from RES measurements collected over subglacial lakes in Antarctica. The idea was to calculate ice absorption starting from the radar equation in the case of subglacial lakes, where the EM reflectivity value is considered a known constant. These values were compared with those obtained from analysis of ice-core dielectric profiles from EPICA ice-core drilling data. Our analysis reveals that the ice absorption rate calculated from RES measurements has an average value of 7.2 dB km−1, and it appears constant, independent of the subglacial lake depth in different zones of the Dome C area. |
format |
Article in Journal/Newspaper |
author |
Achille Zirizzotti James A. Baskaradas Stefano Urbini Lili Cafarella |
author_facet |
Achille Zirizzotti James A. Baskaradas Stefano Urbini Lili Cafarella |
author_sort |
Achille Zirizzotti |
title |
Electromagnetic ice absorption rate at Dome C, Antarctica |
title_short |
Electromagnetic ice absorption rate at Dome C, Antarctica |
title_full |
Electromagnetic ice absorption rate at Dome C, Antarctica |
title_fullStr |
Electromagnetic ice absorption rate at Dome C, Antarctica |
title_full_unstemmed |
Electromagnetic ice absorption rate at Dome C, Antarctica |
title_sort |
electromagnetic ice absorption rate at dome c, antarctica |
publishDate |
2014 |
url |
https://www.openaccessrepository.it/record/122007 https://doi.org/10.3189/2014jog13j208 |
genre |
Antarc* Antarctica EPICA Greenland ice core |
genre_facet |
Antarc* Antarctica EPICA Greenland ice core |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/122007 doi:10.3189/2014jog13j208 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3189/2014jog13j208 |
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Journal of Glaciology |
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60 |
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223 |
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849 |
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854 |
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1781069840690184192 |