Brief communication: Candidate sites of 1.5 Myr old ice 37 km southwest of the Dome C summit, East Antarctica
The search for ice as old as 1.5 Myr requires the identification of places that maximize our chances to retrieve old, well-resolved, undisturbed and datable ice. One of these locations is very likely southwest of the Dome C summit, where elevated bedrock makes the ice thin enough to limit basal melt...
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2018
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ftdoajarticles:oai:doaj.org/article:5dccba2b1c504d6596740042a39a507a 2023-05-15T13:55:17+02:00 Brief communication: Candidate sites of 1.5 Myr old ice 37 km southwest of the Dome C summit, East Antarctica O. Passalacqua M. Cavitte O. Gagliardini F. Gillet-Chaulet F. Parrenin C. Ritz D. Young 2018-06-01T00:00:00Z https://doi.org/10.5194/tc-12-2167-2018 https://doaj.org/article/5dccba2b1c504d6596740042a39a507a EN eng Copernicus Publications https://www.the-cryosphere.net/12/2167/2018/tc-12-2167-2018.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-12-2167-2018 1994-0416 1994-0424 https://doaj.org/article/5dccba2b1c504d6596740042a39a507a The Cryosphere, Vol 12, Pp 2167-2174 (2018) Environmental sciences GE1-350 Geology QE1-996.5 article 2018 ftdoajarticles https://doi.org/10.5194/tc-12-2167-2018 2023-01-08T01:25:37Z The search for ice as old as 1.5 Myr requires the identification of places that maximize our chances to retrieve old, well-resolved, undisturbed and datable ice. One of these locations is very likely southwest of the Dome C summit, where elevated bedrock makes the ice thin enough to limit basal melting. A 3-D ice flow simulation is used to calculate five selection criteria, which together delineate the areas with the most appropriate glaciological properties. These selected areas (a few square kilometers) lie on the flanks of a bedrock high, where a balance is found between risks of basal melting, stratigraphic disturbances and sufficient age resolution. Within these areas, several sites of potential 1.5 Myr old ice are proposed, situated on local bedrock summits or ridges. The trajectories of the ice particles towards these locations are short, and the ice flows over a smoothly undulating bedrock. These sites will help to choose where new high-resolution ground radar surveys should be conducted in upcoming field seasons. Article in Journal/Newspaper Antarc* Antarctica East Antarctica The Cryosphere Directory of Open Access Journals: DOAJ Articles East Antarctica The Cryosphere 12 6 2167 2174 |
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 O. Passalacqua M. Cavitte O. Gagliardini F. Gillet-Chaulet F. Parrenin C. Ritz D. Young Brief communication: Candidate sites of 1.5 Myr old ice 37 km southwest of the Dome C summit, East Antarctica |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
The search for ice as old as 1.5 Myr requires the identification of places that maximize our chances to retrieve old, well-resolved, undisturbed and datable ice. One of these locations is very likely southwest of the Dome C summit, where elevated bedrock makes the ice thin enough to limit basal melting. A 3-D ice flow simulation is used to calculate five selection criteria, which together delineate the areas with the most appropriate glaciological properties. These selected areas (a few square kilometers) lie on the flanks of a bedrock high, where a balance is found between risks of basal melting, stratigraphic disturbances and sufficient age resolution. Within these areas, several sites of potential 1.5 Myr old ice are proposed, situated on local bedrock summits or ridges. The trajectories of the ice particles towards these locations are short, and the ice flows over a smoothly undulating bedrock. These sites will help to choose where new high-resolution ground radar surveys should be conducted in upcoming field seasons. |
format |
Article in Journal/Newspaper |
author |
O. Passalacqua M. Cavitte O. Gagliardini F. Gillet-Chaulet F. Parrenin C. Ritz D. Young |
author_facet |
O. Passalacqua M. Cavitte O. Gagliardini F. Gillet-Chaulet F. Parrenin C. Ritz D. Young |
author_sort |
O. Passalacqua |
title |
Brief communication: Candidate sites of 1.5 Myr old ice 37 km southwest of the Dome C summit, East Antarctica |
title_short |
Brief communication: Candidate sites of 1.5 Myr old ice 37 km southwest of the Dome C summit, East Antarctica |
title_full |
Brief communication: Candidate sites of 1.5 Myr old ice 37 km southwest of the Dome C summit, East Antarctica |
title_fullStr |
Brief communication: Candidate sites of 1.5 Myr old ice 37 km southwest of the Dome C summit, East Antarctica |
title_full_unstemmed |
Brief communication: Candidate sites of 1.5 Myr old ice 37 km southwest of the Dome C summit, East Antarctica |
title_sort |
brief communication: candidate sites of 1.5 myr old ice 37 km southwest of the dome c summit, east antarctica |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-12-2167-2018 https://doaj.org/article/5dccba2b1c504d6596740042a39a507a |
geographic |
East Antarctica |
geographic_facet |
East Antarctica |
genre |
Antarc* Antarctica East Antarctica The Cryosphere |
genre_facet |
Antarc* Antarctica East Antarctica The Cryosphere |
op_source |
The Cryosphere, Vol 12, Pp 2167-2174 (2018) |
op_relation |
https://www.the-cryosphere.net/12/2167/2018/tc-12-2167-2018.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-12-2167-2018 1994-0416 1994-0424 https://doaj.org/article/5dccba2b1c504d6596740042a39a507a |
op_doi |
https://doi.org/10.5194/tc-12-2167-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
6 |
container_start_page |
2167 |
op_container_end_page |
2174 |
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