Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica
In the 2016–2017 austral summer, the University of Texas Institute for Geophysics (UTIG) and the Korea Polar Research Institute (KOPRI) collaborated to perform a helicopter-based radar and laser altimeter survey of lower David Glacier with the goals of characterizing the subglacial water distributio...
Published in: | The Cryosphere |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
2020
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00052049 2023-05-15T13:54:46+02:00 Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica Lindzey, Laura E. Beem, Lucas H. Young, Duncan A. Quartini, Enrica Blankenship, Donald D. Lee, Choon-Ki Lee, Won Sang Lee, Jong Ik Lee, Joohan 2020-07 electronic https://doi.org/10.5194/tc-14-2217-2020 https://noa.gwlb.de/receive/cop_mods_00052049 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00051703/tc-14-2217-2020.pdf https://tc.copernicus.org/articles/14/2217/2020/tc-14-2217-2020.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-14-2217-2020 https://noa.gwlb.de/receive/cop_mods_00052049 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00051703/tc-14-2217-2020.pdf https://tc.copernicus.org/articles/14/2217/2020/tc-14-2217-2020.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2020 ftnonlinearchiv https://doi.org/10.5194/tc-14-2217-2020 2022-02-08T22:36:08Z In the 2016–2017 austral summer, the University of Texas Institute for Geophysics (UTIG) and the Korea Polar Research Institute (KOPRI) collaborated to perform a helicopter-based radar and laser altimeter survey of lower David Glacier with the goals of characterizing the subglacial water distribution that supports a system of active subglacial lakes and informing the site selection for a potential subglacial access drilling project. This survey overlaps with and expands upon an earlier survey of the Drygalski Ice Tongue and the David Glacier grounding zone from 2011 and 2012 to create a 5 km resolution survey extending 200 km upstream from the grounding zone. The surveyed region covers two active subglacial lakes and includes reflights of ICESat ground tracks that extend the surface elevation record in the region. This is one of the most extensive aerogeophysical surveys of an active lake system and provides higher-resolution boundary conditions and basal characterizations that will enable process studies of these features. This paper introduces a new helicopter-mounted ice-penetrating radar and laser altimetry system, notes a discrepancy between the original surface-elevation-derived lake outlines and locations of possible water collection based on basal geometry and hydraulic potential, and presents radar-based observations of basal conditions that are inconsistent with large collections of ponded water despite laser altimetry showing that the hypothesized active lakes are at a highstand. Article in Journal/Newspaper Antarc* Antarctica David Glacier Korea Polar Research Institute The Cryosphere Niedersächsisches Online-Archiv NOA Austral Drygalski ENVELOPE(-61.000,-61.000,-64.717,-64.717) Drygalski Ice Tongue ENVELOPE(163.500,163.500,-75.400,-75.400) David Glacier ENVELOPE(160.000,160.000,-75.333,-75.333) The Cryosphere 14 7 2217 2233 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Lindzey, Laura E. Beem, Lucas H. Young, Duncan A. Quartini, Enrica Blankenship, Donald D. Lee, Choon-Ki Lee, Won Sang Lee, Jong Ik Lee, Joohan Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica |
topic_facet |
article Verlagsveröffentlichung |
description |
In the 2016–2017 austral summer, the University of Texas Institute for Geophysics (UTIG) and the Korea Polar Research Institute (KOPRI) collaborated to perform a helicopter-based radar and laser altimeter survey of lower David Glacier with the goals of characterizing the subglacial water distribution that supports a system of active subglacial lakes and informing the site selection for a potential subglacial access drilling project. This survey overlaps with and expands upon an earlier survey of the Drygalski Ice Tongue and the David Glacier grounding zone from 2011 and 2012 to create a 5 km resolution survey extending 200 km upstream from the grounding zone. The surveyed region covers two active subglacial lakes and includes reflights of ICESat ground tracks that extend the surface elevation record in the region. This is one of the most extensive aerogeophysical surveys of an active lake system and provides higher-resolution boundary conditions and basal characterizations that will enable process studies of these features. This paper introduces a new helicopter-mounted ice-penetrating radar and laser altimetry system, notes a discrepancy between the original surface-elevation-derived lake outlines and locations of possible water collection based on basal geometry and hydraulic potential, and presents radar-based observations of basal conditions that are inconsistent with large collections of ponded water despite laser altimetry showing that the hypothesized active lakes are at a highstand. |
format |
Article in Journal/Newspaper |
author |
Lindzey, Laura E. Beem, Lucas H. Young, Duncan A. Quartini, Enrica Blankenship, Donald D. Lee, Choon-Ki Lee, Won Sang Lee, Jong Ik Lee, Joohan |
author_facet |
Lindzey, Laura E. Beem, Lucas H. Young, Duncan A. Quartini, Enrica Blankenship, Donald D. Lee, Choon-Ki Lee, Won Sang Lee, Jong Ik Lee, Joohan |
author_sort |
Lindzey, Laura E. |
title |
Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica |
title_short |
Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica |
title_full |
Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica |
title_fullStr |
Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica |
title_full_unstemmed |
Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica |
title_sort |
aerogeophysical characterization of an active subglacial lake system in the david glacier catchment, antarctica |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-14-2217-2020 https://noa.gwlb.de/receive/cop_mods_00052049 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00051703/tc-14-2217-2020.pdf https://tc.copernicus.org/articles/14/2217/2020/tc-14-2217-2020.pdf |
long_lat |
ENVELOPE(-61.000,-61.000,-64.717,-64.717) ENVELOPE(163.500,163.500,-75.400,-75.400) ENVELOPE(160.000,160.000,-75.333,-75.333) |
geographic |
Austral Drygalski Drygalski Ice Tongue David Glacier |
geographic_facet |
Austral Drygalski Drygalski Ice Tongue David Glacier |
genre |
Antarc* Antarctica David Glacier Korea Polar Research Institute The Cryosphere |
genre_facet |
Antarc* Antarctica David Glacier Korea Polar Research Institute 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-14-2217-2020 https://noa.gwlb.de/receive/cop_mods_00052049 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00051703/tc-14-2217-2020.pdf https://tc.copernicus.org/articles/14/2217/2020/tc-14-2217-2020.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-14-2217-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
7 |
container_start_page |
2217 |
op_container_end_page |
2233 |
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1766260879358164992 |