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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European Geosciences Union
2021
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ftcaltechauth:oai:authors.library.caltech.edu:108618 2023-05-15T13:59:21+02:00 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 application/pdf https://authors.library.caltech.edu/108618/ https://authors.library.caltech.edu/108618/1/tc-15-1173-2021.pdf https://authors.library.caltech.edu/108618/3/tc-15-1173-2021-supplement.pdf https://resolver.caltech.edu/CaltechAUTHORS:20210405-095123195 unknown European Geosciences Union https://authors.library.caltech.edu/108618/1/tc-15-1173-2021.pdf https://authors.library.caltech.edu/108618/3/tc-15-1173-2021-supplement.pdf Thomas, Elizabeth Ruth and Gacitúa, Guisella and Pedro, Joel B. and Faith King, Amy Constance and Markle, Bradley and Potocki, Mariusz and Moser, Dorothea Elisabeth (2021) Physical properties of shallow ice cores from Antarctic and sub-Antarctic islands. Cryosphere, 15 (2). pp. 1173-1186. ISSN 1994-0416. doi:10.5194/tc-15-1173-2021. https://resolver.caltech.edu/CaltechAUTHORS:20210405-095123195 <https://resolver.caltech.edu/CaltechAUTHORS:20210405-095123195> Article PeerReviewed 2021 ftcaltechauth https://doi.org/10.5194/tc-15-1173-2021 2021-04-15T17:12:14Z 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 m⁻³, 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. Article in Journal/Newspaper Antarc* Antarctic Bellingshausen Sea Bouvet Island ice core Peter I Island Ross Sea Sea ice Young Island Caltech Authors (California Institute of Technology) Antarctic Bellingshausen Sea Bouvet ENVELOPE(3.358,3.358,-54.422,-54.422) Bouvet Island ENVELOPE(3.358,3.358,-54.422,-54.422) Peter I Island ENVELOPE(-90.583,-90.583,-68.783,-68.783) Ross Sea Young Island ENVELOPE(162.400,162.400,-66.417,-66.417) The Cryosphere 15 2 1173 1186 |
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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 m⁻³, 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. |
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://authors.library.caltech.edu/108618/ https://authors.library.caltech.edu/108618/1/tc-15-1173-2021.pdf https://authors.library.caltech.edu/108618/3/tc-15-1173-2021-supplement.pdf https://resolver.caltech.edu/CaltechAUTHORS:20210405-095123195 |
long_lat |
ENVELOPE(3.358,3.358,-54.422,-54.422) ENVELOPE(3.358,3.358,-54.422,-54.422) ENVELOPE(-90.583,-90.583,-68.783,-68.783) ENVELOPE(162.400,162.400,-66.417,-66.417) |
geographic |
Antarctic Bellingshausen Sea Bouvet Bouvet Island Peter I Island Ross Sea Young Island |
geographic_facet |
Antarctic Bellingshausen Sea Bouvet Bouvet Island Peter I Island Ross Sea Young Island |
genre |
Antarc* Antarctic Bellingshausen Sea Bouvet Island ice core Peter I Island Ross Sea Sea ice Young Island |
genre_facet |
Antarc* Antarctic Bellingshausen Sea Bouvet Island ice core Peter I Island Ross Sea Sea ice Young Island |
op_relation |
https://authors.library.caltech.edu/108618/1/tc-15-1173-2021.pdf https://authors.library.caltech.edu/108618/3/tc-15-1173-2021-supplement.pdf Thomas, Elizabeth Ruth and Gacitúa, Guisella and Pedro, Joel B. and Faith King, Amy Constance and Markle, Bradley and Potocki, Mariusz and Moser, Dorothea Elisabeth (2021) Physical properties of shallow ice cores from Antarctic and sub-Antarctic islands. Cryosphere, 15 (2). pp. 1173-1186. ISSN 1994-0416. doi:10.5194/tc-15-1173-2021. https://resolver.caltech.edu/CaltechAUTHORS:20210405-095123195 <https://resolver.caltech.edu/CaltechAUTHORS:20210405-095123195> |
op_doi |
https://doi.org/10.5194/tc-15-1173-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
2 |
container_start_page |
1173 |
op_container_end_page |
1186 |
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1766267891380912128 |