Comparison of measurements from different radio-echo sounding systems and synchronization with the ice core 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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ftdoajarticles:oai:doaj.org/article:846f80909fef46deb2babe823dd54ea0 2023-05-15T13:54:21+02:00 Comparison of measurements from different radio-echo sounding systems and synchronization with the ice core at Dome C, Antarctica A. Winter D. Steinhage E. J. Arnold D. D. Blankenship M. G. P. Cavitte H. F. J. Corr J. D. Paden S. Urbini D. A. Young O. Eisen 2017-03-01T00:00:00Z https://doi.org/10.5194/tc-11-653-2017 https://doaj.org/article/846f80909fef46deb2babe823dd54ea0 EN eng Copernicus Publications http://www.the-cryosphere.net/11/653/2017/tc-11-653-2017.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-11-653-2017 https://doaj.org/article/846f80909fef46deb2babe823dd54ea0 The Cryosphere, Vol 11, Iss 1, Pp 653-668 (2017) Environmental sciences GE1-350 Geology QE1-996.5 article 2017 ftdoajarticles https://doi.org/10.5194/tc-11-653-2017 2022-12-31T05:11:23Z 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 bed topography, penetration depth and capacity of imaging the basal layer. We address the questions of the compatibility of existing radar data for common interpretation and the suitability of the individual systems for 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 bottom-most region. Considering both aspects, which we judge as crucial factors in the search for old ice, the CReSIS and the UTIG systems are the most suitable ones. In addition to the RES data set comparison we calculate a synthetic radar trace from EDC density and conductivity profiles. We identify 10 common IRHs in the measured RES data and the synthetic trace. We then conduct a sensitivity study for which we remove certain peaks from the input conductivity profile. As a result the respective reflections disappear from the modeled radar trace. In this way, we establish a depth conversion of the measured travel times of the IRHs. Furthermore, we use these sensitivity studies to investigate the cause of observed reflections. The identified IRHs are assigned ages from the EDC's timescale. 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. Article in Journal/Newspaper Antarc* Antarctica East Antarctica EPICA ice core The Cryosphere Directory of Open Access Journals: DOAJ Articles East Antarctica The Cryosphere 11 1 653 668 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 A. Winter D. Steinhage E. J. Arnold D. D. Blankenship M. G. P. Cavitte H. F. J. Corr J. D. Paden S. Urbini D. A. Young O. Eisen Comparison of measurements from different radio-echo sounding systems and synchronization with the ice core at Dome C, Antarctica |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
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 bed topography, penetration depth and capacity of imaging the basal layer. We address the questions of the compatibility of existing radar data for common interpretation and the suitability of the individual systems for 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 bottom-most region. Considering both aspects, which we judge as crucial factors in the search for old ice, the CReSIS and the UTIG systems are the most suitable ones. In addition to the RES data set comparison we calculate a synthetic radar trace from EDC density and conductivity profiles. We identify 10 common IRHs in the measured RES data and the synthetic trace. We then conduct a sensitivity study for which we remove certain peaks from the input conductivity profile. As a result the respective reflections disappear from the modeled radar trace. In this way, we establish a depth conversion of the measured travel times of the IRHs. Furthermore, we use these sensitivity studies to investigate the cause of observed reflections. The identified IRHs are assigned ages from the EDC's timescale. 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. |
format |
Article in Journal/Newspaper |
author |
A. Winter D. Steinhage E. J. Arnold D. D. Blankenship M. G. P. Cavitte H. F. J. Corr J. D. Paden S. Urbini D. A. Young O. Eisen |
author_facet |
A. Winter D. Steinhage E. J. Arnold D. D. Blankenship M. G. P. Cavitte H. F. J. Corr J. D. Paden S. Urbini D. A. Young O. Eisen |
author_sort |
A. Winter |
title |
Comparison of measurements from different radio-echo sounding systems and synchronization with the ice core at Dome C, Antarctica |
title_short |
Comparison of measurements from different radio-echo sounding systems and synchronization with the ice core at Dome C, Antarctica |
title_full |
Comparison of measurements from different radio-echo sounding systems and synchronization with the ice core at Dome C, Antarctica |
title_fullStr |
Comparison of measurements from different radio-echo sounding systems and synchronization with the ice core at Dome C, Antarctica |
title_full_unstemmed |
Comparison of measurements from different radio-echo sounding systems and synchronization with the ice core at Dome C, Antarctica |
title_sort |
comparison of measurements from different radio-echo sounding systems and synchronization with the ice core at dome c, antarctica |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/tc-11-653-2017 https://doaj.org/article/846f80909fef46deb2babe823dd54ea0 |
geographic |
East Antarctica |
geographic_facet |
East Antarctica |
genre |
Antarc* Antarctica East Antarctica EPICA ice core The Cryosphere |
genre_facet |
Antarc* Antarctica East Antarctica EPICA ice core The Cryosphere |
op_source |
The Cryosphere, Vol 11, Iss 1, Pp 653-668 (2017) |
op_relation |
http://www.the-cryosphere.net/11/653/2017/tc-11-653-2017.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-11-653-2017 https://doaj.org/article/846f80909fef46deb2babe823dd54ea0 |
op_doi |
https://doi.org/10.5194/tc-11-653-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
1 |
container_start_page |
653 |
op_container_end_page |
668 |
_version_ |
1766260069211570176 |