High-resolution boundary conditions of an old ice target near Dome C, Antarctica
A high-resolution (1 km line spacing) aerogeophysical survey was conducted over a region near the East Antarctic Ice Sheet's Dome C that may hold a 1.5 Myr climate record. We combined new ice thickness data derived from an airborne coherent radar sounder with unpublished data that was in part u...
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ftunivtasecite:oai:ecite.utas.edu.au:122568 2023-05-15T13:49:03+02:00 High-resolution boundary conditions of an old ice target near Dome C, Antarctica Young, DA Roberts, JL Ritz, C Frezzotti, M Quartini, E Cavitte, MGP Tozer, CR Steinhage, D Urbini, S Corr, HFJ van Ommen, TD Blankenship, DD 2017 application/pdf https://doi.org/10.5194/tc-11-1897-2017 http://ecite.utas.edu.au/122568 en eng Copernicus GmbH http://ecite.utas.edu.au/122568/1/122568 final.pdf http://dx.doi.org/10.5194/tc-11-1897-2017 Young, DA and Roberts, JL and Ritz, C and Frezzotti, M and Quartini, E and Cavitte, MGP and Tozer, CR and Steinhage, D and Urbini, S and Corr, HFJ and van Ommen, TD and Blankenship, DD, High-resolution boundary conditions of an old ice target near Dome C, Antarctica, Cryosphere, 11, (4) pp. 1897-1911. ISSN 1994-0416 (2017) [Refereed Article] http://ecite.utas.edu.au/122568 Earth Sciences Physical Geography and Environmental Geoscience Glaciology Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.5194/tc-11-1897-2017 2019-12-13T22:21:24Z A high-resolution (1 km line spacing) aerogeophysical survey was conducted over a region near the East Antarctic Ice Sheet's Dome C that may hold a 1.5 Myr climate record. We combined new ice thickness data derived from an airborne coherent radar sounder with unpublished data that was in part unavailable for earlier compilations, and we were able to remove older data with high positional uncertainties. We generated a revised high-resolution digital elevation model (DEM) to investigate the potential for an old ice record in this region, and used laser altimetry to confirm a Cryosat-2 derived DEM for inferring the glaciological state of the candidate area. By measuring the specularity content of the bed, we were able to find an additional 50 subglacial lakes near the candidate site, and by Doppler focusing the radar data, we were able to map out the roughness of the bed at length scales of hundreds of meters. We find that the primary candidate region contains elevated rough topography interspersed with scattered subglacial lakes and some regions of smoother bed. Free subglacial water appears to be restricted from bed overlain by ice thicknesses of less than 3000 m. A site near the ice divide was selected for further investigation. The high resolution of this ice thickness data set also allows us to explore the nature of ice thickness uncertainties in the context of radar geometry and processing. Article in Journal/Newspaper Antarc* Antarctic Antarctica eCite UTAS (University of Tasmania) Antarctic The Cryosphere 11 4 1897 1911 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology Young, DA Roberts, JL Ritz, C Frezzotti, M Quartini, E Cavitte, MGP Tozer, CR Steinhage, D Urbini, S Corr, HFJ van Ommen, TD Blankenship, DD High-resolution boundary conditions of an old ice target near Dome C, Antarctica |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
description |
A high-resolution (1 km line spacing) aerogeophysical survey was conducted over a region near the East Antarctic Ice Sheet's Dome C that may hold a 1.5 Myr climate record. We combined new ice thickness data derived from an airborne coherent radar sounder with unpublished data that was in part unavailable for earlier compilations, and we were able to remove older data with high positional uncertainties. We generated a revised high-resolution digital elevation model (DEM) to investigate the potential for an old ice record in this region, and used laser altimetry to confirm a Cryosat-2 derived DEM for inferring the glaciological state of the candidate area. By measuring the specularity content of the bed, we were able to find an additional 50 subglacial lakes near the candidate site, and by Doppler focusing the radar data, we were able to map out the roughness of the bed at length scales of hundreds of meters. We find that the primary candidate region contains elevated rough topography interspersed with scattered subglacial lakes and some regions of smoother bed. Free subglacial water appears to be restricted from bed overlain by ice thicknesses of less than 3000 m. A site near the ice divide was selected for further investigation. The high resolution of this ice thickness data set also allows us to explore the nature of ice thickness uncertainties in the context of radar geometry and processing. |
format |
Article in Journal/Newspaper |
author |
Young, DA Roberts, JL Ritz, C Frezzotti, M Quartini, E Cavitte, MGP Tozer, CR Steinhage, D Urbini, S Corr, HFJ van Ommen, TD Blankenship, DD |
author_facet |
Young, DA Roberts, JL Ritz, C Frezzotti, M Quartini, E Cavitte, MGP Tozer, CR Steinhage, D Urbini, S Corr, HFJ van Ommen, TD Blankenship, DD |
author_sort |
Young, DA |
title |
High-resolution boundary conditions of an old ice target near Dome C, Antarctica |
title_short |
High-resolution boundary conditions of an old ice target near Dome C, Antarctica |
title_full |
High-resolution boundary conditions of an old ice target near Dome C, Antarctica |
title_fullStr |
High-resolution boundary conditions of an old ice target near Dome C, Antarctica |
title_full_unstemmed |
High-resolution boundary conditions of an old ice target near Dome C, Antarctica |
title_sort |
high-resolution boundary conditions of an old ice target near dome c, antarctica |
publisher |
Copernicus GmbH |
publishDate |
2017 |
url |
https://doi.org/10.5194/tc-11-1897-2017 http://ecite.utas.edu.au/122568 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://ecite.utas.edu.au/122568/1/122568 final.pdf http://dx.doi.org/10.5194/tc-11-1897-2017 Young, DA and Roberts, JL and Ritz, C and Frezzotti, M and Quartini, E and Cavitte, MGP and Tozer, CR and Steinhage, D and Urbini, S and Corr, HFJ and van Ommen, TD and Blankenship, DD, High-resolution boundary conditions of an old ice target near Dome C, Antarctica, Cryosphere, 11, (4) pp. 1897-1911. ISSN 1994-0416 (2017) [Refereed Article] http://ecite.utas.edu.au/122568 |
op_doi |
https://doi.org/10.5194/tc-11-1897-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
4 |
container_start_page |
1897 |
op_container_end_page |
1911 |
_version_ |
1766250739846348800 |