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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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
2013
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Online Access: | https://doi.org/10.5194/tc-7-855-2013 http://www.the-cryosphere.net/7/855/2013/tc-7-855-2013.pdf https://doaj.org/article/f52fda2f00ef460599937522b15428f4 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:f52fda2f00ef460599937522b15428f4 2023-05-15T14:03:46+02:00 Radio-frequency probes of Antarctic ice at South Pole D. Besson I. Kravchenko 2013-05-01 https://doi.org/10.5194/tc-7-855-2013 http://www.the-cryosphere.net/7/855/2013/tc-7-855-2013.pdf https://doaj.org/article/f52fda2f00ef460599937522b15428f4 en eng Copernicus Publications doi:10.5194/tc-7-855-2013 1994-0416 1994-0424 http://www.the-cryosphere.net/7/855/2013/tc-7-855-2013.pdf https://doaj.org/article/f52fda2f00ef460599937522b15428f4 undefined The Cryosphere, Vol 7, Iss 3, Pp 855-866 (2013) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2013 fttriple https://doi.org/10.5194/tc-7-855-2013 2023-01-22T19:31:01Z 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 Unknown Antarctic East Antarctica South Pole The Cryosphere 7 3 855 866 |
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fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir D. Besson I. Kravchenko Radio-frequency probes of Antarctic ice at South Pole |
topic_facet |
geo envir |
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 |
D. Besson I. Kravchenko |
author_facet |
D. Besson I. Kravchenko |
author_sort |
D. Besson |
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 http://www.the-cryosphere.net/7/855/2013/tc-7-855-2013.pdf https://doaj.org/article/f52fda2f00ef460599937522b15428f4 |
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_source |
The Cryosphere, Vol 7, Iss 3, Pp 855-866 (2013) |
op_relation |
doi:10.5194/tc-7-855-2013 1994-0416 1994-0424 http://www.the-cryosphere.net/7/855/2013/tc-7-855-2013.pdf https://doaj.org/article/f52fda2f00ef460599937522b15428f4 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-7-855-2013 |
container_title |
The Cryosphere |
container_volume |
7 |
container_issue |
3 |
container_start_page |
855 |
op_container_end_page |
866 |
_version_ |
1766274610336104448 |