A framework for attenuation method selection evaluated with ice-penetrating radar data at South Pole Lake
Abstract All radar power interpretations require a correction for attenuative losses. Moreover, radar attenuation is a proxy for ice-column properties, such as temperature and chemistry. Prior studies use either paired thermodynamic and conductivity models or the radar data themselves to calculate a...
Published in: | Annals of Glaciology |
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Language: | English |
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Online Access: | http://dx.doi.org/10.1017/aog.2020.32 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305520000324 |
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crcambridgeupr:10.1017/aog.2020.32 2024-09-09T19:00:52+00:00 A framework for attenuation method selection evaluated with ice-penetrating radar data at South Pole Lake Hills, Benjamin H. Christianson, Knut Holschuh, Nicholas 2020 http://dx.doi.org/10.1017/aog.2020.32 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305520000324 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Annals of Glaciology volume 61, issue 81, page 176-187 ISSN 0260-3055 1727-5644 journal-article 2020 crcambridgeupr https://doi.org/10.1017/aog.2020.32 2024-08-21T04:03:44Z Abstract All radar power interpretations require a correction for attenuative losses. Moreover, radar attenuation is a proxy for ice-column properties, such as temperature and chemistry. Prior studies use either paired thermodynamic and conductivity models or the radar data themselves to calculate attenuation, but there is no standard method to do so; and, before now, there has been no robust methodological comparison. Here, we develop a framework meant to guide the implementation of empirical attenuation methods based on survey design and regional glaciological conditions. We divide the methods into the three main groups: (1) those that infer attenuation from a single reflector across many traces; (2) those that infer attenuation from multiple reflectors within one trace; and (3) those that infer attenuation by contrasting the measured power from primary and secondary reflections. To assess our framework, we introduce a new ground-based radar survey from South Pole Lake, comparing selected empirical methods to the expected attenuation from a temperature- and chemistry-dependent Arrhenius model. Based on the small surveyed area, lack of a sufficient calibration surface and low reflector relief, the attenuation methods that use multiple reflectors are most suitable at South Pole Lake. Article in Journal/Newspaper Annals of Glaciology South pole Cambridge University Press New Ground ENVELOPE(-55.215,-55.215,49.567,49.567) Pole Lake ENVELOPE(-100.645,-100.645,56.802,56.802) South Pole Annals of Glaciology 61 81 176 187 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract All radar power interpretations require a correction for attenuative losses. Moreover, radar attenuation is a proxy for ice-column properties, such as temperature and chemistry. Prior studies use either paired thermodynamic and conductivity models or the radar data themselves to calculate attenuation, but there is no standard method to do so; and, before now, there has been no robust methodological comparison. Here, we develop a framework meant to guide the implementation of empirical attenuation methods based on survey design and regional glaciological conditions. We divide the methods into the three main groups: (1) those that infer attenuation from a single reflector across many traces; (2) those that infer attenuation from multiple reflectors within one trace; and (3) those that infer attenuation by contrasting the measured power from primary and secondary reflections. To assess our framework, we introduce a new ground-based radar survey from South Pole Lake, comparing selected empirical methods to the expected attenuation from a temperature- and chemistry-dependent Arrhenius model. Based on the small surveyed area, lack of a sufficient calibration surface and low reflector relief, the attenuation methods that use multiple reflectors are most suitable at South Pole Lake. |
format |
Article in Journal/Newspaper |
author |
Hills, Benjamin H. Christianson, Knut Holschuh, Nicholas |
spellingShingle |
Hills, Benjamin H. Christianson, Knut Holschuh, Nicholas A framework for attenuation method selection evaluated with ice-penetrating radar data at South Pole Lake |
author_facet |
Hills, Benjamin H. Christianson, Knut Holschuh, Nicholas |
author_sort |
Hills, Benjamin H. |
title |
A framework for attenuation method selection evaluated with ice-penetrating radar data at South Pole Lake |
title_short |
A framework for attenuation method selection evaluated with ice-penetrating radar data at South Pole Lake |
title_full |
A framework for attenuation method selection evaluated with ice-penetrating radar data at South Pole Lake |
title_fullStr |
A framework for attenuation method selection evaluated with ice-penetrating radar data at South Pole Lake |
title_full_unstemmed |
A framework for attenuation method selection evaluated with ice-penetrating radar data at South Pole Lake |
title_sort |
framework for attenuation method selection evaluated with ice-penetrating radar data at south pole lake |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1017/aog.2020.32 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305520000324 |
long_lat |
ENVELOPE(-55.215,-55.215,49.567,49.567) ENVELOPE(-100.645,-100.645,56.802,56.802) |
geographic |
New Ground Pole Lake South Pole |
geographic_facet |
New Ground Pole Lake South Pole |
genre |
Annals of Glaciology South pole |
genre_facet |
Annals of Glaciology South pole |
op_source |
Annals of Glaciology volume 61, issue 81, page 176-187 ISSN 0260-3055 1727-5644 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/aog.2020.32 |
container_title |
Annals of Glaciology |
container_volume |
61 |
container_issue |
81 |
container_start_page |
176 |
op_container_end_page |
187 |
_version_ |
1809942477376847872 |