In-situ radiocarbon production by neutrons and muons in an Antarctic blue ice field at Scharffenbergbotnen; a status report.
In the radiocarbon accelerator mass spectrometry ( (super 14) C AMS) analysis of gases obtained in a dry extraction from a 52-m Antarctic ice core, we observed (super 14) CO (sub 2) and (super 14) CO concentrations decreasing with depth. The concentrations are explained in terms of in-situ productio...
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Radiocarbon
2001
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ftunivarizonaojs:oai:journals.uair.arizona.edu:article/3907 2023-05-15T14:02:46+02:00 In-situ radiocarbon production by neutrons and muons in an Antarctic blue ice field at Scharffenbergbotnen; a status report. van der Borg, K van, der M Alderliesten, C d, A M Lamers, R N Oerlemans, J Thomassen, M van, de W 2001-01-01 application/pdf https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3907 eng eng Radiocarbon https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3907/3332 https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3907 Radiocarbon; Vol 43, No 2B (2001); 751-757 0033-8222 blue ice;Scharffenbergbotnen ice field;progress report;ice fields;ablation;report;Antarctica;lower Holocene;muons;accelerator mass spectra;ice sheets;ice cores;neutrons;concentration;in situ;mass spectra;spectra;Holocene;glacial geology;Pleistocene;upper Pleistocene;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;carbon dioxide;absolute age;geochemistry info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2001 ftunivarizonaojs 2020-11-14T16:10:19Z In the radiocarbon accelerator mass spectrometry ( (super 14) C AMS) analysis of gases obtained in a dry extraction from a 52-m Antarctic ice core, we observed (super 14) CO (sub 2) and (super 14) CO concentrations decreasing with depth. The concentrations are explained in terms of in-situ production by neutrons and captured muons in ablating ice. The ratio of the (super 14) CO (sub 2) concentration to that of (super 14) CO has been found to be constant at 1.9+ or -0.3. The ablation rates obtained of 42+ or -18 cm.yr (super -1) and 40+ or -13 cm.yr (super -1) for the neutron and muon components, respectively, are about three times higher than observed from stake readings. The discrepancy may point to an incomplete extraction of the dry extraction method. Using the constant ratio in (super 14) CO (sub 2) and (super 14) CO concentrations we correct for the in-situ component in the trapped (super 14) CO (sub 2) and deduce an age of 10,300+ or -900 BP for the ice core. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Journals at the University of Arizona Antarctic Scharffenbergbotnen ENVELOPE(-11.092,-11.092,-74.575,-74.575) |
institution |
Open Polar |
collection |
Journals at the University of Arizona |
op_collection_id |
ftunivarizonaojs |
language |
English |
topic |
blue ice;Scharffenbergbotnen ice field;progress report;ice fields;ablation;report;Antarctica;lower Holocene;muons;accelerator mass spectra;ice sheets;ice cores;neutrons;concentration;in situ;mass spectra;spectra;Holocene;glacial geology;Pleistocene;upper Pleistocene;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;carbon dioxide;absolute age;geochemistry |
spellingShingle |
blue ice;Scharffenbergbotnen ice field;progress report;ice fields;ablation;report;Antarctica;lower Holocene;muons;accelerator mass spectra;ice sheets;ice cores;neutrons;concentration;in situ;mass spectra;spectra;Holocene;glacial geology;Pleistocene;upper Pleistocene;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;carbon dioxide;absolute age;geochemistry van der Borg, K van, der M Alderliesten, C d, A M Lamers, R N Oerlemans, J Thomassen, M van, de W In-situ radiocarbon production by neutrons and muons in an Antarctic blue ice field at Scharffenbergbotnen; a status report. |
topic_facet |
blue ice;Scharffenbergbotnen ice field;progress report;ice fields;ablation;report;Antarctica;lower Holocene;muons;accelerator mass spectra;ice sheets;ice cores;neutrons;concentration;in situ;mass spectra;spectra;Holocene;glacial geology;Pleistocene;upper Pleistocene;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;carbon dioxide;absolute age;geochemistry |
description |
In the radiocarbon accelerator mass spectrometry ( (super 14) C AMS) analysis of gases obtained in a dry extraction from a 52-m Antarctic ice core, we observed (super 14) CO (sub 2) and (super 14) CO concentrations decreasing with depth. The concentrations are explained in terms of in-situ production by neutrons and captured muons in ablating ice. The ratio of the (super 14) CO (sub 2) concentration to that of (super 14) CO has been found to be constant at 1.9+ or -0.3. The ablation rates obtained of 42+ or -18 cm.yr (super -1) and 40+ or -13 cm.yr (super -1) for the neutron and muon components, respectively, are about three times higher than observed from stake readings. The discrepancy may point to an incomplete extraction of the dry extraction method. Using the constant ratio in (super 14) CO (sub 2) and (super 14) CO concentrations we correct for the in-situ component in the trapped (super 14) CO (sub 2) and deduce an age of 10,300+ or -900 BP for the ice core. |
format |
Article in Journal/Newspaper |
author |
van der Borg, K van, der M Alderliesten, C d, A M Lamers, R N Oerlemans, J Thomassen, M van, de W |
author_facet |
van der Borg, K van, der M Alderliesten, C d, A M Lamers, R N Oerlemans, J Thomassen, M van, de W |
author_sort |
van der Borg, K |
title |
In-situ radiocarbon production by neutrons and muons in an Antarctic blue ice field at Scharffenbergbotnen; a status report. |
title_short |
In-situ radiocarbon production by neutrons and muons in an Antarctic blue ice field at Scharffenbergbotnen; a status report. |
title_full |
In-situ radiocarbon production by neutrons and muons in an Antarctic blue ice field at Scharffenbergbotnen; a status report. |
title_fullStr |
In-situ radiocarbon production by neutrons and muons in an Antarctic blue ice field at Scharffenbergbotnen; a status report. |
title_full_unstemmed |
In-situ radiocarbon production by neutrons and muons in an Antarctic blue ice field at Scharffenbergbotnen; a status report. |
title_sort |
in-situ radiocarbon production by neutrons and muons in an antarctic blue ice field at scharffenbergbotnen; a status report. |
publisher |
Radiocarbon |
publishDate |
2001 |
url |
https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3907 |
long_lat |
ENVELOPE(-11.092,-11.092,-74.575,-74.575) |
geographic |
Antarctic Scharffenbergbotnen |
geographic_facet |
Antarctic Scharffenbergbotnen |
genre |
Antarc* Antarctic Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica ice core |
op_source |
Radiocarbon; Vol 43, No 2B (2001); 751-757 0033-8222 |
op_relation |
https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3907/3332 https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3907 |
_version_ |
1766273178475167744 |