Physical properties of shallow ice cores from Antarctic and sub-Antarctic islands
The sub-Antarctic is one of the most data-sparse regions on earth. A number of glaciated Antarctic and sub-Antarctic islands have the potential to provide unique ice core records of past climate, atmospheric circulation, and sea ice. However, very little is known about the glaciology of these remote...
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ftcaltechauth:oai:authors.library.caltech.edu:3drb0-kv267 2024-09-09T19:10:13+00:00 Physical properties of shallow ice cores from Antarctic and sub-Antarctic islands Thomas, Elizabeth Ruth Gacitúa, Guisella Pedro, Joel B. Faith King, Amy Constance Markle, Bradley Potocki, Mariusz Moser, Dorothea Elisabeth 2021-03-03 https://doi.org/10.5194/tc-15-1173-2021 unknown European Geosciences Union https://doi.org/10.5194/tc-15-1173-2021-supplement https://doi.org/10.5194/tc-15-1173-2021 oai:authors.library.caltech.edu:3drb0-kv267 eprintid:108618 resolverid:CaltechAUTHORS:20210405-095123195 info:eu-repo/semantics/openAccess Other Cryosphere, 15(2), 1173-1186, (2021-03-03) info:eu-repo/semantics/article 2021 ftcaltechauth https://doi.org/10.5194/tc-15-1173-202110.5194/tc-15-1173-2021-supplement 2024-08-06T15:34:59Z The sub-Antarctic is one of the most data-sparse regions on earth. A number of glaciated Antarctic and sub-Antarctic islands have the potential to provide unique ice core records of past climate, atmospheric circulation, and sea ice. However, very little is known about the glaciology of these remote islands or their vulnerability to warming atmospheric temperature. Here we present melt histories and density profiles from shallow ice (firn) cores (14 to 24 m) drilled on three sub-Antarctic islands and two Antarctic coastal domes. Additionally, complementary ground-penetrating radar (GPR) data were collected to further characterize each site and assess the spatial distribution of the observed melt layers. This study includes the first ever firn cores from Bouvet Island (54∘25′19′′ S, 03∘23′27′′ E) in the South Atlantic, from Peter I Island (68∘51′05′′ S, 90∘30′35′′ W) in the Bellingshausen Sea, and from Young Island (66∘31′44′′ S, 162∘33′21′′ E) in the Ross Sea sector's Balleny island chain. Despite their sub-Antarctic location, surface melt is low at most sites (melt layers account for ∼ 10 % of total core), with undisturbed ice layers in the upper ∼ 40 m, suggesting minimal impact of meltwater percolation. The exception is Young Island, where melt layers account for 47 % of the firn core. Surface snow densities range from 0.47 to 0.52 kg mâ»Â³, with close-off depths ranging from 21 to 51 m. Based on the measured density, we estimate that the bottom ages of a 100 m ice core drilled on Peter 1 Island would reach ∼ 1856 CE and ∼ 1874 CE at Young Island. © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. Received: 18 April 2020 – Discussion started: 24 June 2020; Revised: 14 January 2021 – Accepted: 18 January 2021 – Published: 3 March 2021. Funding was provided to subICE by École Polytechnique Fédérale de Lausanne, the Swiss Polar Institute, and Ferring ... Article in Journal/Newspaper Antarc* Antarctic Bellingshausen Sea Bouvet Island ice core Peter I Island Ross Sea Sea ice Swiss Polar Institute Young Island Caltech Authors (California Institute of Technology) Antarctic Ross Sea Bellingshausen Sea Bouvet ENVELOPE(3.358,3.358,-54.422,-54.422) Bouvet Island ENVELOPE(3.358,3.358,-54.422,-54.422) Young Island ENVELOPE(162.400,162.400,-66.417,-66.417) Peter I Island ENVELOPE(-90.583,-90.583,-68.783,-68.783) |
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Open Polar |
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Caltech Authors (California Institute of Technology) |
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description |
The sub-Antarctic is one of the most data-sparse regions on earth. A number of glaciated Antarctic and sub-Antarctic islands have the potential to provide unique ice core records of past climate, atmospheric circulation, and sea ice. However, very little is known about the glaciology of these remote islands or their vulnerability to warming atmospheric temperature. Here we present melt histories and density profiles from shallow ice (firn) cores (14 to 24 m) drilled on three sub-Antarctic islands and two Antarctic coastal domes. Additionally, complementary ground-penetrating radar (GPR) data were collected to further characterize each site and assess the spatial distribution of the observed melt layers. This study includes the first ever firn cores from Bouvet Island (54∘25′19′′ S, 03∘23′27′′ E) in the South Atlantic, from Peter I Island (68∘51′05′′ S, 90∘30′35′′ W) in the Bellingshausen Sea, and from Young Island (66∘31′44′′ S, 162∘33′21′′ E) in the Ross Sea sector's Balleny island chain. Despite their sub-Antarctic location, surface melt is low at most sites (melt layers account for ∼ 10 % of total core), with undisturbed ice layers in the upper ∼ 40 m, suggesting minimal impact of meltwater percolation. The exception is Young Island, where melt layers account for 47 % of the firn core. Surface snow densities range from 0.47 to 0.52 kg mâ»Â³, with close-off depths ranging from 21 to 51 m. Based on the measured density, we estimate that the bottom ages of a 100 m ice core drilled on Peter 1 Island would reach ∼ 1856 CE and ∼ 1874 CE at Young Island. © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. Received: 18 April 2020 – Discussion started: 24 June 2020; Revised: 14 January 2021 – Accepted: 18 January 2021 – Published: 3 March 2021. Funding was provided to subICE by École Polytechnique Fédérale de Lausanne, the Swiss Polar Institute, and Ferring ... |
format |
Article in Journal/Newspaper |
author |
Thomas, Elizabeth Ruth Gacitúa, Guisella Pedro, Joel B. Faith King, Amy Constance Markle, Bradley Potocki, Mariusz Moser, Dorothea Elisabeth |
spellingShingle |
Thomas, Elizabeth Ruth Gacitúa, Guisella Pedro, Joel B. Faith King, Amy Constance Markle, Bradley Potocki, Mariusz Moser, Dorothea Elisabeth Physical properties of shallow ice cores from Antarctic and sub-Antarctic islands |
author_facet |
Thomas, Elizabeth Ruth Gacitúa, Guisella Pedro, Joel B. Faith King, Amy Constance Markle, Bradley Potocki, Mariusz Moser, Dorothea Elisabeth |
author_sort |
Thomas, Elizabeth Ruth |
title |
Physical properties of shallow ice cores from Antarctic and sub-Antarctic islands |
title_short |
Physical properties of shallow ice cores from Antarctic and sub-Antarctic islands |
title_full |
Physical properties of shallow ice cores from Antarctic and sub-Antarctic islands |
title_fullStr |
Physical properties of shallow ice cores from Antarctic and sub-Antarctic islands |
title_full_unstemmed |
Physical properties of shallow ice cores from Antarctic and sub-Antarctic islands |
title_sort |
physical properties of shallow ice cores from antarctic and sub-antarctic islands |
publisher |
European Geosciences Union |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-1173-2021 |
long_lat |
ENVELOPE(3.358,3.358,-54.422,-54.422) ENVELOPE(3.358,3.358,-54.422,-54.422) ENVELOPE(162.400,162.400,-66.417,-66.417) ENVELOPE(-90.583,-90.583,-68.783,-68.783) |
geographic |
Antarctic Ross Sea Bellingshausen Sea Bouvet Bouvet Island Young Island Peter I Island |
geographic_facet |
Antarctic Ross Sea Bellingshausen Sea Bouvet Bouvet Island Young Island Peter I Island |
genre |
Antarc* Antarctic Bellingshausen Sea Bouvet Island ice core Peter I Island Ross Sea Sea ice Swiss Polar Institute Young Island |
genre_facet |
Antarc* Antarctic Bellingshausen Sea Bouvet Island ice core Peter I Island Ross Sea Sea ice Swiss Polar Institute Young Island |
op_source |
Cryosphere, 15(2), 1173-1186, (2021-03-03) |
op_relation |
https://doi.org/10.5194/tc-15-1173-2021-supplement https://doi.org/10.5194/tc-15-1173-2021 oai:authors.library.caltech.edu:3drb0-kv267 eprintid:108618 resolverid:CaltechAUTHORS:20210405-095123195 |
op_rights |
info:eu-repo/semantics/openAccess Other |
op_doi |
https://doi.org/10.5194/tc-15-1173-202110.5194/tc-15-1173-2021-supplement |
_version_ |
1809824873332080640 |