Radio-frequency probes of Antarctic ice at South Pole
Using hardware developed for the ARA (Askaryan Radio Array) particle astrophysics experiment, we herein report on the amplitude and temporal characteristics of polarized surface radar echo data collected in South Polar ice using radio sounding equipment with 0.5-ns echo-time sampling. We observe str...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00022684 2023-05-15T13:41:01+02:00 Radio-frequency probes of Antarctic ice at South Pole Besson, D. Kravchenko, I. 2013-05 electronic https://doi.org/10.5194/tc-7-855-2013 https://noa.gwlb.de/receive/cop_mods_00022684 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00022639/tc-7-855-2013.pdf https://tc.copernicus.org/articles/7/855/2013/tc-7-855-2013.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-7-855-2013 https://noa.gwlb.de/receive/cop_mods_00022684 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00022639/tc-7-855-2013.pdf https://tc.copernicus.org/articles/7/855/2013/tc-7-855-2013.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2013 ftnonlinearchiv https://doi.org/10.5194/tc-7-855-2013 2022-02-08T22:51:01Z Using hardware developed for the ARA (Askaryan Radio Array) particle astrophysics experiment, we herein report on the amplitude and temporal characteristics of polarized surface radar echo data collected in South Polar ice using radio sounding equipment with 0.5-ns echo-time sampling. We observe strong echoes at 6, 9.6, 13.9, 17, and 19 μs following vertical pulse emission from the surface, corresponding to reflectors in the upper half of the ice sheet. The synchronicity of those echoes for all broadcast azimuthal polarizations affirms the lack of observable birefringence over the upper half of the ice sheet. Of the five strongest echoes, three exhibit an evident amplitude correlation with the local surface ice flow direction, qualitatively consistent with measurements in East Antarctica. Combined with other radio echo sounding data, we conclude that observed birefringent asymmetries at South Pole are generated entirely in the lower half of the ice sheet. By contrast, birefringent asymmetries are observed at shallow depths in East Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet South pole South pole The Cryosphere Niedersächsisches Online-Archiv NOA Antarctic East Antarctica South Pole The Cryosphere 7 3 855 866 |
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article Verlagsveröffentlichung Besson, D. Kravchenko, I. Radio-frequency probes of Antarctic ice at South Pole |
topic_facet |
article Verlagsveröffentlichung |
description |
Using hardware developed for the ARA (Askaryan Radio Array) particle astrophysics experiment, we herein report on the amplitude and temporal characteristics of polarized surface radar echo data collected in South Polar ice using radio sounding equipment with 0.5-ns echo-time sampling. We observe strong echoes at 6, 9.6, 13.9, 17, and 19 μs following vertical pulse emission from the surface, corresponding to reflectors in the upper half of the ice sheet. The synchronicity of those echoes for all broadcast azimuthal polarizations affirms the lack of observable birefringence over the upper half of the ice sheet. Of the five strongest echoes, three exhibit an evident amplitude correlation with the local surface ice flow direction, qualitatively consistent with measurements in East Antarctica. Combined with other radio echo sounding data, we conclude that observed birefringent asymmetries at South Pole are generated entirely in the lower half of the ice sheet. By contrast, birefringent asymmetries are observed at shallow depths in East Antarctica. |
format |
Article in Journal/Newspaper |
author |
Besson, D. Kravchenko, I. |
author_facet |
Besson, D. Kravchenko, I. |
author_sort |
Besson, D. |
title |
Radio-frequency probes of Antarctic ice at South Pole |
title_short |
Radio-frequency probes of Antarctic ice at South Pole |
title_full |
Radio-frequency probes of Antarctic ice at South Pole |
title_fullStr |
Radio-frequency probes of Antarctic ice at South Pole |
title_full_unstemmed |
Radio-frequency probes of Antarctic ice at South Pole |
title_sort |
radio-frequency probes of antarctic ice at south pole |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/tc-7-855-2013 https://noa.gwlb.de/receive/cop_mods_00022684 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00022639/tc-7-855-2013.pdf https://tc.copernicus.org/articles/7/855/2013/tc-7-855-2013.pdf |
geographic |
Antarctic East Antarctica South Pole |
geographic_facet |
Antarctic East Antarctica South Pole |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet South pole South pole The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet South pole South pole The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-7-855-2013 https://noa.gwlb.de/receive/cop_mods_00022684 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00022639/tc-7-855-2013.pdf https://tc.copernicus.org/articles/7/855/2013/tc-7-855-2013.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-7-855-2013 |
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The Cryosphere |
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7 |
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855 |
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866 |
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