Interferometric discrimination of cross-track bed clutter in ice-penetrating radar sounding data
The interpretations of relevant interfaces (i.e. the surface and bed) in radar sounding datasets over glaciers and ice sheets are primary boundary conditions in a variety of climate studies and particularly subglacial water routing models. It is therefore necessary to ensure these interpretations ar...
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Cambridge University Press
2020
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ftdoajarticles:oai:doaj.org/article:f75d790c4f8f469fb4bc8583f79cd64d 2023-05-15T13:29:35+02:00 Interferometric discrimination of cross-track bed clutter in ice-penetrating radar sounding data Kirk M. Scanlan Anja Rutishauser Duncan A. Young Donald D. Blankenship 2020-04-01T00:00:00Z https://doi.org/10.1017/aog.2020.20 https://doaj.org/article/f75d790c4f8f469fb4bc8583f79cd64d EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0260305520000208/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2020.20 0260-3055 1727-5644 https://doaj.org/article/f75d790c4f8f469fb4bc8583f79cd64d Annals of Glaciology, Vol 61, Pp 68-73 (2020) Clutter interferometry radar remote sensing radioglaciology Meteorology. Climatology QC851-999 article 2020 ftdoajarticles https://doi.org/10.1017/aog.2020.20 2023-03-12T01:31:55Z The interpretations of relevant interfaces (i.e. the surface and bed) in radar sounding datasets over glaciers and ice sheets are primary boundary conditions in a variety of climate studies and particularly subglacial water routing models. It is therefore necessary to ensure these interpretations are consistent and not affected by cross-track clutter. For the surface interface, interferometry and a family of methods relying on digital elevation models have been used to successfully discriminate cross-track surface clutter. Here we present how interferometry can be applied to the problem of basal clutter from cross-track bed topography. Our approach is based on a comparison of the differential phases of ambiguous reflectors that may represent bed clutter and the differential phase of a reflector in an adjacent area that appears unaffected by basal clutter. The reflector yielding the smallest interferometric phase difference relative to the unambiguous bed reflector is considered to represent its consistent continuation. We successfully demonstrate our approach using 60 MHz center frequency MARFA data collected over Devon Ice Cap in the Canadian Arctic. Finally, we investigate the effects of clutter-affected and interferometry-corrected bed interpretations on ice layer thickness estimates, basal hydraulic head gradients and the potential extent of inferred subglacial water bodies. Article in Journal/Newspaper Annals of Glaciology Arctic Ice cap Directory of Open Access Journals: DOAJ Articles Arctic Devon Ice Cap ENVELOPE(-82.499,-82.499,75.335,75.335) Annals of Glaciology 61 81 68 73 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Clutter interferometry radar remote sensing radioglaciology Meteorology. Climatology QC851-999 |
spellingShingle |
Clutter interferometry radar remote sensing radioglaciology Meteorology. Climatology QC851-999 Kirk M. Scanlan Anja Rutishauser Duncan A. Young Donald D. Blankenship Interferometric discrimination of cross-track bed clutter in ice-penetrating radar sounding data |
topic_facet |
Clutter interferometry radar remote sensing radioglaciology Meteorology. Climatology QC851-999 |
description |
The interpretations of relevant interfaces (i.e. the surface and bed) in radar sounding datasets over glaciers and ice sheets are primary boundary conditions in a variety of climate studies and particularly subglacial water routing models. It is therefore necessary to ensure these interpretations are consistent and not affected by cross-track clutter. For the surface interface, interferometry and a family of methods relying on digital elevation models have been used to successfully discriminate cross-track surface clutter. Here we present how interferometry can be applied to the problem of basal clutter from cross-track bed topography. Our approach is based on a comparison of the differential phases of ambiguous reflectors that may represent bed clutter and the differential phase of a reflector in an adjacent area that appears unaffected by basal clutter. The reflector yielding the smallest interferometric phase difference relative to the unambiguous bed reflector is considered to represent its consistent continuation. We successfully demonstrate our approach using 60 MHz center frequency MARFA data collected over Devon Ice Cap in the Canadian Arctic. Finally, we investigate the effects of clutter-affected and interferometry-corrected bed interpretations on ice layer thickness estimates, basal hydraulic head gradients and the potential extent of inferred subglacial water bodies. |
format |
Article in Journal/Newspaper |
author |
Kirk M. Scanlan Anja Rutishauser Duncan A. Young Donald D. Blankenship |
author_facet |
Kirk M. Scanlan Anja Rutishauser Duncan A. Young Donald D. Blankenship |
author_sort |
Kirk M. Scanlan |
title |
Interferometric discrimination of cross-track bed clutter in ice-penetrating radar sounding data |
title_short |
Interferometric discrimination of cross-track bed clutter in ice-penetrating radar sounding data |
title_full |
Interferometric discrimination of cross-track bed clutter in ice-penetrating radar sounding data |
title_fullStr |
Interferometric discrimination of cross-track bed clutter in ice-penetrating radar sounding data |
title_full_unstemmed |
Interferometric discrimination of cross-track bed clutter in ice-penetrating radar sounding data |
title_sort |
interferometric discrimination of cross-track bed clutter in ice-penetrating radar sounding data |
publisher |
Cambridge University Press |
publishDate |
2020 |
url |
https://doi.org/10.1017/aog.2020.20 https://doaj.org/article/f75d790c4f8f469fb4bc8583f79cd64d |
long_lat |
ENVELOPE(-82.499,-82.499,75.335,75.335) |
geographic |
Arctic Devon Ice Cap |
geographic_facet |
Arctic Devon Ice Cap |
genre |
Annals of Glaciology Arctic Ice cap |
genre_facet |
Annals of Glaciology Arctic Ice cap |
op_source |
Annals of Glaciology, Vol 61, Pp 68-73 (2020) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0260305520000208/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2020.20 0260-3055 1727-5644 https://doaj.org/article/f75d790c4f8f469fb4bc8583f79cd64d |
op_doi |
https://doi.org/10.1017/aog.2020.20 |
container_title |
Annals of Glaciology |
container_volume |
61 |
container_issue |
81 |
container_start_page |
68 |
op_container_end_page |
73 |
_version_ |
1766001332231077888 |