Airborne fine-resolution UHF radar: an approach to the study of englacial reflections, firn compaction and ice attenuation rates
This is the published version. Copyright 2015 International Glaciological Society We have built and operated an ultra-wideband UHF pulsed-chirp radar for measuring firn stratigraphy from airborne platforms over the ice sheets of Greenland and West Antarctica. Our analysis found a wide range of capab...
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Online Access: | http://hdl.handle.net/1808/18705 https://doi.org/10.3189/2015JoG14J089 |
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ftunivkansas:oai:kuscholarworks.ku.edu:1808/18705 2023-05-15T13:32:09+02:00 Airborne fine-resolution UHF radar: an approach to the study of englacial reflections, firn compaction and ice attenuation rates Cameron, Lewis Gogineni, Sivaprasad Rodriguez-Morales, Fernando Panzer, Ben Stumpf, Theresa Paden, John D. Leuschen, Carl J. 2015-10-19T15:57:52Z http://hdl.handle.net/1808/18705 https://doi.org/10.3189/2015JoG14J089 unknown International Glaciological Society Lewis, Cameron, Sivaprasad Gogineni, Fernando Rodriguez-Morales, Ben Panzer, Theresa Stumpf, John Paden, and Carl Leuschen. "Airborne Fine-resolution UHF Radar: An Approach to the Study of Englacial Reflections, Firn Compaction and Ice Attenuation Rates." Journal of Glaciology 61.225 (2015): 89-100. http://dx.doi.org/10.3189/2015JoG14J089 http://hdl.handle.net/1808/18705 doi:10.3189/2015JoG14J089 openAccess Ice shelves Polar firn Radio-echo sounding Remote sensing Article 2015 ftunivkansas https://doi.org/10.3189/2015JoG14J089 2022-08-26T13:17:51Z This is the published version. Copyright 2015 International Glaciological Society We have built and operated an ultra-wideband UHF pulsed-chirp radar for measuring firn stratigraphy from airborne platforms over the ice sheets of Greenland and West Antarctica. Our analysis found a wide range of capabilities, including imaging of post firn–ice transition horizons and sounding of shallow glaciers and ice shelves. Imaging of horizons to depths exceeding 600 m was possible in the colder interior regions of the ice sheet, where scattering from the ice surface and inclusions was minimal. The radar's high sensitivity and large dynamic range point to loss tangent variations as the dominant mechanism for these englacial reflective horizons. The radar is capable of mapping interfaces with reflection coefficients as low as –80 dB near the firn–ice transition and as low as –64 dB at depths of 600 m. We found that firn horizon reflectivity strongly mirrored density variance, a result of the near-unity interfacial transmission coefficients. Zones with differing compaction mechanisms were also apparent in the data. We were able to sound many ice shelves and areas of shallow ice. We estimated ice attenuation rates for a few locations, and our attenuation estimates for the Ross Ice Shelf, West Antarctica, appear to agree well with earlier reported results. Article in Journal/Newspaper Antarc* Antarctica Greenland Ice Sheet Ice Shelf Ice Shelves Journal of Glaciology Ross Ice Shelf West Antarctica The University of Kansas: KU ScholarWorks Greenland Range Point ENVELOPE(173.253,173.253,52.929,52.929) Ross Ice Shelf West Antarctica Journal of Glaciology 61 225 89 100 |
institution |
Open Polar |
collection |
The University of Kansas: KU ScholarWorks |
op_collection_id |
ftunivkansas |
language |
unknown |
topic |
Ice shelves Polar firn Radio-echo sounding Remote sensing |
spellingShingle |
Ice shelves Polar firn Radio-echo sounding Remote sensing Cameron, Lewis Gogineni, Sivaprasad Rodriguez-Morales, Fernando Panzer, Ben Stumpf, Theresa Paden, John D. Leuschen, Carl J. Airborne fine-resolution UHF radar: an approach to the study of englacial reflections, firn compaction and ice attenuation rates |
topic_facet |
Ice shelves Polar firn Radio-echo sounding Remote sensing |
description |
This is the published version. Copyright 2015 International Glaciological Society We have built and operated an ultra-wideband UHF pulsed-chirp radar for measuring firn stratigraphy from airborne platforms over the ice sheets of Greenland and West Antarctica. Our analysis found a wide range of capabilities, including imaging of post firn–ice transition horizons and sounding of shallow glaciers and ice shelves. Imaging of horizons to depths exceeding 600 m was possible in the colder interior regions of the ice sheet, where scattering from the ice surface and inclusions was minimal. The radar's high sensitivity and large dynamic range point to loss tangent variations as the dominant mechanism for these englacial reflective horizons. The radar is capable of mapping interfaces with reflection coefficients as low as –80 dB near the firn–ice transition and as low as –64 dB at depths of 600 m. We found that firn horizon reflectivity strongly mirrored density variance, a result of the near-unity interfacial transmission coefficients. Zones with differing compaction mechanisms were also apparent in the data. We were able to sound many ice shelves and areas of shallow ice. We estimated ice attenuation rates for a few locations, and our attenuation estimates for the Ross Ice Shelf, West Antarctica, appear to agree well with earlier reported results. |
format |
Article in Journal/Newspaper |
author |
Cameron, Lewis Gogineni, Sivaprasad Rodriguez-Morales, Fernando Panzer, Ben Stumpf, Theresa Paden, John D. Leuschen, Carl J. |
author_facet |
Cameron, Lewis Gogineni, Sivaprasad Rodriguez-Morales, Fernando Panzer, Ben Stumpf, Theresa Paden, John D. Leuschen, Carl J. |
author_sort |
Cameron, Lewis |
title |
Airborne fine-resolution UHF radar: an approach to the study of englacial reflections, firn compaction and ice attenuation rates |
title_short |
Airborne fine-resolution UHF radar: an approach to the study of englacial reflections, firn compaction and ice attenuation rates |
title_full |
Airborne fine-resolution UHF radar: an approach to the study of englacial reflections, firn compaction and ice attenuation rates |
title_fullStr |
Airborne fine-resolution UHF radar: an approach to the study of englacial reflections, firn compaction and ice attenuation rates |
title_full_unstemmed |
Airborne fine-resolution UHF radar: an approach to the study of englacial reflections, firn compaction and ice attenuation rates |
title_sort |
airborne fine-resolution uhf radar: an approach to the study of englacial reflections, firn compaction and ice attenuation rates |
publisher |
International Glaciological Society |
publishDate |
2015 |
url |
http://hdl.handle.net/1808/18705 https://doi.org/10.3189/2015JoG14J089 |
long_lat |
ENVELOPE(173.253,173.253,52.929,52.929) |
geographic |
Greenland Range Point Ross Ice Shelf West Antarctica |
geographic_facet |
Greenland Range Point Ross Ice Shelf West Antarctica |
genre |
Antarc* Antarctica Greenland Ice Sheet Ice Shelf Ice Shelves Journal of Glaciology Ross Ice Shelf West Antarctica |
genre_facet |
Antarc* Antarctica Greenland Ice Sheet Ice Shelf Ice Shelves Journal of Glaciology Ross Ice Shelf West Antarctica |
op_relation |
Lewis, Cameron, Sivaprasad Gogineni, Fernando Rodriguez-Morales, Ben Panzer, Theresa Stumpf, John Paden, and Carl Leuschen. "Airborne Fine-resolution UHF Radar: An Approach to the Study of Englacial Reflections, Firn Compaction and Ice Attenuation Rates." Journal of Glaciology 61.225 (2015): 89-100. http://dx.doi.org/10.3189/2015JoG14J089 http://hdl.handle.net/1808/18705 doi:10.3189/2015JoG14J089 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.3189/2015JoG14J089 |
container_title |
Journal of Glaciology |
container_volume |
61 |
container_issue |
225 |
container_start_page |
89 |
op_container_end_page |
100 |
_version_ |
1766024637953605632 |