Mapping age and basal conditions of ice in the Dome Fuji region, Antarctica, by combining radar internal layer stratigraphy and flow modeling
The Dome Fuji (DF) region in Antarctica is a potential site for an ice core with a record of over 1 Myr. Here, we combine large-scale internal airborne radar stratigraphy with a 1-D model to estimate the age of basal ice in the DF region. The radar data used in the study were collected in a survey d...
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00069221 2023-11-12T04:06:18+01:00 Mapping age and basal conditions of ice in the Dome Fuji region, Antarctica, by combining radar internal layer stratigraphy and flow modeling Wang, Zhuo Chung, Ailsa Steinhage, Daniel Parrenin, Frédéric Freitag, Johannes Eisen, Olaf 2023-10 electronic https://doi.org/10.5194/tc-17-4297-2023 https://noa.gwlb.de/receive/cop_mods_00069221 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067613/tc-17-4297-2023.pdf https://tc.copernicus.org/articles/17/4297/2023/tc-17-4297-2023.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-17-4297-2023 https://noa.gwlb.de/receive/cop_mods_00069221 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067613/tc-17-4297-2023.pdf https://tc.copernicus.org/articles/17/4297/2023/tc-17-4297-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/tc-17-4297-2023 2023-10-15T23:22:18Z The Dome Fuji (DF) region in Antarctica is a potential site for an ice core with a record of over 1 Myr. Here, we combine large-scale internal airborne radar stratigraphy with a 1-D model to estimate the age of basal ice in the DF region. The radar data used in the study were collected in a survey during the 2016–2017 Antarctic season. We transfer the latest age–depth scales from the DF ice core to isochrones traced in radargrams in the surrounding 500 km × 550 km region. At each point of the survey the 1-D model uses the ages of isochrones to construct the age–depth scale at depths where dated isochrones do not exist, the surface accumulation rate and the basal thermal condition, including melt rate and the thickness of stagnant ice. Our resulting age distribution and age density suggest that several promising sites with ice older than 1.5 Myr in the DF region might exist. The deduced melt rates and presence of stagnant ice provide more constraints for locating sites with a cold base. The accumulation rates range from 0.015 to 0.038 m a−1 ice equivalent. Based on sensitivity studies we find that the number and depth of picked isochrones and the timescale of the ice core severely affect the model results. Our study demonstrates that constraints from deep radar isochrones and a trustworthy timescale could improve the model estimation to find old ice in the DF region. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core The Cryosphere Niedersächsisches Online-Archiv NOA Antarctic Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) The Cryosphere 17 10 4297 4314 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Wang, Zhuo Chung, Ailsa Steinhage, Daniel Parrenin, Frédéric Freitag, Johannes Eisen, Olaf Mapping age and basal conditions of ice in the Dome Fuji region, Antarctica, by combining radar internal layer stratigraphy and flow modeling |
topic_facet |
article Verlagsveröffentlichung |
description |
The Dome Fuji (DF) region in Antarctica is a potential site for an ice core with a record of over 1 Myr. Here, we combine large-scale internal airborne radar stratigraphy with a 1-D model to estimate the age of basal ice in the DF region. The radar data used in the study were collected in a survey during the 2016–2017 Antarctic season. We transfer the latest age–depth scales from the DF ice core to isochrones traced in radargrams in the surrounding 500 km × 550 km region. At each point of the survey the 1-D model uses the ages of isochrones to construct the age–depth scale at depths where dated isochrones do not exist, the surface accumulation rate and the basal thermal condition, including melt rate and the thickness of stagnant ice. Our resulting age distribution and age density suggest that several promising sites with ice older than 1.5 Myr in the DF region might exist. The deduced melt rates and presence of stagnant ice provide more constraints for locating sites with a cold base. The accumulation rates range from 0.015 to 0.038 m a−1 ice equivalent. Based on sensitivity studies we find that the number and depth of picked isochrones and the timescale of the ice core severely affect the model results. Our study demonstrates that constraints from deep radar isochrones and a trustworthy timescale could improve the model estimation to find old ice in the DF region. |
format |
Article in Journal/Newspaper |
author |
Wang, Zhuo Chung, Ailsa Steinhage, Daniel Parrenin, Frédéric Freitag, Johannes Eisen, Olaf |
author_facet |
Wang, Zhuo Chung, Ailsa Steinhage, Daniel Parrenin, Frédéric Freitag, Johannes Eisen, Olaf |
author_sort |
Wang, Zhuo |
title |
Mapping age and basal conditions of ice in the Dome Fuji region, Antarctica, by combining radar internal layer stratigraphy and flow modeling |
title_short |
Mapping age and basal conditions of ice in the Dome Fuji region, Antarctica, by combining radar internal layer stratigraphy and flow modeling |
title_full |
Mapping age and basal conditions of ice in the Dome Fuji region, Antarctica, by combining radar internal layer stratigraphy and flow modeling |
title_fullStr |
Mapping age and basal conditions of ice in the Dome Fuji region, Antarctica, by combining radar internal layer stratigraphy and flow modeling |
title_full_unstemmed |
Mapping age and basal conditions of ice in the Dome Fuji region, Antarctica, by combining radar internal layer stratigraphy and flow modeling |
title_sort |
mapping age and basal conditions of ice in the dome fuji region, antarctica, by combining radar internal layer stratigraphy and flow modeling |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-4297-2023 https://noa.gwlb.de/receive/cop_mods_00069221 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067613/tc-17-4297-2023.pdf https://tc.copernicus.org/articles/17/4297/2023/tc-17-4297-2023.pdf |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) |
geographic |
Antarctic Dome Fuji |
geographic_facet |
Antarctic Dome Fuji |
genre |
Antarc* Antarctic Antarctica ice core The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica ice core 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-17-4297-2023 https://noa.gwlb.de/receive/cop_mods_00069221 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067613/tc-17-4297-2023.pdf https://tc.copernicus.org/articles/17/4297/2023/tc-17-4297-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-17-4297-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
10 |
container_start_page |
4297 |
op_container_end_page |
4314 |
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1782327399577288704 |