An in Situ Gas-Extraction System to Radiocarbon Date Glacier Ice
A new down bore-hole instrument to extract atmospheric gases entrapped in glacier ice was designed, developed and tested in a Greenland ice tunnel. Using this ice and a 7.5 kW. source, about 30 hr. are required to melt the approximately 1 metric ton sample, extract the gases, and to separate and col...
Published in: | Journal of Glaciology |
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Language: | English |
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Cambridge University Press (CUP)
1967
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Online Access: | http://dx.doi.org/10.1017/s0022143000020232 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020232 |
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crcambridgeupr:10.1017/s0022143000020232 2024-03-03T08:44:36+00:00 An in Situ Gas-Extraction System to Radiocarbon Date Glacier Ice Oeschger, H. Alder, B. Langway, C. C. 1967 http://dx.doi.org/10.1017/s0022143000020232 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020232 en eng Cambridge University Press (CUP) Journal of Glaciology volume 6, issue 48, page 939-942 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1967 crcambridgeupr https://doi.org/10.1017/s0022143000020232 2024-02-08T08:39:08Z A new down bore-hole instrument to extract atmospheric gases entrapped in glacier ice was designed, developed and tested in a Greenland ice tunnel. Using this ice and a 7.5 kW. source, about 30 hr. are required to melt the approximately 1 metric ton sample, extract the gases, and to separate and collect with molecular sieves the minimum of 100 cm. 3 of CO 2 necessary for the 14 C measurements made later using special low-level counters. Age results using the down bore-hole CO 2 samples agree with results obtained earlier from CO 2 samples collected at the same tunnel location using a vacuum-vessel melting technique. A mean value of 5,120±200 yr. b.p. is obtained for the seven samples measured using both collection systems, making this the oldest natural polar glacier ice measured to date. Article in Journal/Newspaper glacier Greenland Journal of Glaciology Cambridge University Press Greenland Journal of Glaciology 6 48 939 942 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Oeschger, H. Alder, B. Langway, C. C. An in Situ Gas-Extraction System to Radiocarbon Date Glacier Ice |
topic_facet |
Earth-Surface Processes |
description |
A new down bore-hole instrument to extract atmospheric gases entrapped in glacier ice was designed, developed and tested in a Greenland ice tunnel. Using this ice and a 7.5 kW. source, about 30 hr. are required to melt the approximately 1 metric ton sample, extract the gases, and to separate and collect with molecular sieves the minimum of 100 cm. 3 of CO 2 necessary for the 14 C measurements made later using special low-level counters. Age results using the down bore-hole CO 2 samples agree with results obtained earlier from CO 2 samples collected at the same tunnel location using a vacuum-vessel melting technique. A mean value of 5,120±200 yr. b.p. is obtained for the seven samples measured using both collection systems, making this the oldest natural polar glacier ice measured to date. |
format |
Article in Journal/Newspaper |
author |
Oeschger, H. Alder, B. Langway, C. C. |
author_facet |
Oeschger, H. Alder, B. Langway, C. C. |
author_sort |
Oeschger, H. |
title |
An in Situ Gas-Extraction System to Radiocarbon Date Glacier Ice |
title_short |
An in Situ Gas-Extraction System to Radiocarbon Date Glacier Ice |
title_full |
An in Situ Gas-Extraction System to Radiocarbon Date Glacier Ice |
title_fullStr |
An in Situ Gas-Extraction System to Radiocarbon Date Glacier Ice |
title_full_unstemmed |
An in Situ Gas-Extraction System to Radiocarbon Date Glacier Ice |
title_sort |
in situ gas-extraction system to radiocarbon date glacier ice |
publisher |
Cambridge University Press (CUP) |
publishDate |
1967 |
url |
http://dx.doi.org/10.1017/s0022143000020232 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020232 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Journal of Glaciology |
genre_facet |
glacier Greenland Journal of Glaciology |
op_source |
Journal of Glaciology volume 6, issue 48, page 939-942 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000020232 |
container_title |
Journal of Glaciology |
container_volume |
6 |
container_issue |
48 |
container_start_page |
939 |
op_container_end_page |
942 |
_version_ |
1792500092088877056 |