Radio-echo sounding measurements and ice-core synchronization at Dome C, Antarctica
We present a compilation of radio-echo sounding (RES) measurements of five radar systems (AWI, BAS, CReSIS, INGV and UTIG) around the EPICA Dome C (EDC) drill site, East Antarctica. The aim of our study is to investigate the differences of the various systems in their resolution of internal reflecti...
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ftingv:oai:www.earth-prints.org:2122/10787 2023-05-15T14:01:37+02:00 Radio-echo sounding measurements and ice-core synchronization at Dome C, Antarctica Winter, Anna Steinhage, Daniel Arnold, Emily J. Blankenship, Donald D. Cavitte, Marie G. P. Corr, Hugh F. J. Paden, John D. Urbini, Stefano Young, Duncan A. Eisen, Olaf AWI #PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia 2017 http://hdl.handle.net/2122/10787 https://doi.org/10.5194/tc-2016-147 en eng The Cryosphere Discussions /11 (2017) http://hdl.handle.net/2122/10787 doi:10.5194/tc-2016-147 open article 2017 ftingv https://doi.org/10.5194/tc-2016-147 2022-07-29T06:07:12Z We present a compilation of radio-echo sounding (RES) measurements of five radar systems (AWI, BAS, CReSIS, INGV and UTIG) around the EPICA Dome C (EDC) drill site, East Antarctica. The aim of our study is to investigate the differences of the various systems in their resolution of internal reflection horizons (IRHs) and bedrock topography, penetration depth, and quality of imaging the basal layer. We address the questions of the compatibility of existing radar data for common interpretation, and the 5 suitability of the individual systems for Oldest Ice reconnaissance surveys.We find that the most distinct IRHs and IRH patterns can be identified and transferred between most data sets. Considerable differences between the RES systems exist in range resolution and depiction of the basal layer. Considering both aspects, which we judge as crucial factors in the search for old ice, the CReSIS and the UTIG systems are the most valuable ones. In addition to the RES data set comparison we calculate a synthetic radar trace from EDC density and conductivity profiles.We identify ten common IRHs in the measured 10 RES data and the synthetic trace. The reflection-causing conductivity sections are determined by sensitivity studies with the synthetic trace. In this way, we accomplish an accurate two-way travel time to depth conversion for the reflectors, without having to use a precise velocity-depth function that would accumulate depth uncertainties with increasing depth. The identified IRHs are assigned with the AICC2012 time scale age. Due to the isochronous character of these conductivity-caused IRHs, they are a means to extend the Dome C age structure by tracing the IRHs along the RES profiles. Published 653-668 5A. Paleoclima e ricerche polari JCR Journal Article in Journal/Newspaper Antarc* Antarctica East Antarctica EPICA ice core The Cryosphere The Cryosphere Discussions Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) East Antarctica |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
language |
English |
description |
We present a compilation of radio-echo sounding (RES) measurements of five radar systems (AWI, BAS, CReSIS, INGV and UTIG) around the EPICA Dome C (EDC) drill site, East Antarctica. The aim of our study is to investigate the differences of the various systems in their resolution of internal reflection horizons (IRHs) and bedrock topography, penetration depth, and quality of imaging the basal layer. We address the questions of the compatibility of existing radar data for common interpretation, and the 5 suitability of the individual systems for Oldest Ice reconnaissance surveys.We find that the most distinct IRHs and IRH patterns can be identified and transferred between most data sets. Considerable differences between the RES systems exist in range resolution and depiction of the basal layer. Considering both aspects, which we judge as crucial factors in the search for old ice, the CReSIS and the UTIG systems are the most valuable ones. In addition to the RES data set comparison we calculate a synthetic radar trace from EDC density and conductivity profiles.We identify ten common IRHs in the measured 10 RES data and the synthetic trace. The reflection-causing conductivity sections are determined by sensitivity studies with the synthetic trace. In this way, we accomplish an accurate two-way travel time to depth conversion for the reflectors, without having to use a precise velocity-depth function that would accumulate depth uncertainties with increasing depth. The identified IRHs are assigned with the AICC2012 time scale age. Due to the isochronous character of these conductivity-caused IRHs, they are a means to extend the Dome C age structure by tracing the IRHs along the RES profiles. Published 653-668 5A. Paleoclima e ricerche polari JCR Journal |
author2 |
AWI #PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia |
format |
Article in Journal/Newspaper |
author |
Winter, Anna Steinhage, Daniel Arnold, Emily J. Blankenship, Donald D. Cavitte, Marie G. P. Corr, Hugh F. J. Paden, John D. Urbini, Stefano Young, Duncan A. Eisen, Olaf |
spellingShingle |
Winter, Anna Steinhage, Daniel Arnold, Emily J. Blankenship, Donald D. Cavitte, Marie G. P. Corr, Hugh F. J. Paden, John D. Urbini, Stefano Young, Duncan A. Eisen, Olaf Radio-echo sounding measurements and ice-core synchronization at Dome C, Antarctica |
author_facet |
Winter, Anna Steinhage, Daniel Arnold, Emily J. Blankenship, Donald D. Cavitte, Marie G. P. Corr, Hugh F. J. Paden, John D. Urbini, Stefano Young, Duncan A. Eisen, Olaf |
author_sort |
Winter, Anna |
title |
Radio-echo sounding measurements and ice-core synchronization at Dome C, Antarctica |
title_short |
Radio-echo sounding measurements and ice-core synchronization at Dome C, Antarctica |
title_full |
Radio-echo sounding measurements and ice-core synchronization at Dome C, Antarctica |
title_fullStr |
Radio-echo sounding measurements and ice-core synchronization at Dome C, Antarctica |
title_full_unstemmed |
Radio-echo sounding measurements and ice-core synchronization at Dome C, Antarctica |
title_sort |
radio-echo sounding measurements and ice-core synchronization at dome c, antarctica |
publishDate |
2017 |
url |
http://hdl.handle.net/2122/10787 https://doi.org/10.5194/tc-2016-147 |
geographic |
East Antarctica |
geographic_facet |
East Antarctica |
genre |
Antarc* Antarctica East Antarctica EPICA ice core The Cryosphere The Cryosphere Discussions |
genre_facet |
Antarc* Antarctica East Antarctica EPICA ice core The Cryosphere The Cryosphere Discussions |
op_relation |
The Cryosphere Discussions /11 (2017) http://hdl.handle.net/2122/10787 doi:10.5194/tc-2016-147 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/tc-2016-147 |
_version_ |
1766271566574780416 |