Anthropogenic Chlorofluoromethanes in the Greenland and Norwegian Seas
The concentrations of two industrially produced chlorofluoromethanes, CCl 3 F(F-11) and CCl 2 F 2 (F-12), have been measured in the water column and in the marine atmosphere of the Greenland and Norwegian seas. Measurable concentrations of these two chlorofluoromethanes have penetrated to the deep b...
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American Association for the Advancement of Science (AAAS)
1983
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Online Access: | http://dx.doi.org/10.1126/science.221.4607.265 https://www.science.org/doi/pdf/10.1126/science.221.4607.265 |
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craaas:10.1126/science.221.4607.265 2024-06-23T07:53:09+00:00 Anthropogenic Chlorofluoromethanes in the Greenland and Norwegian Seas Bullister, J. L. Weiss, R. F. 1983 http://dx.doi.org/10.1126/science.221.4607.265 https://www.science.org/doi/pdf/10.1126/science.221.4607.265 en eng American Association for the Advancement of Science (AAAS) Science volume 221, issue 4607, page 265-268 ISSN 0036-8075 1095-9203 journal-article 1983 craaas https://doi.org/10.1126/science.221.4607.265 2024-05-24T12:53:43Z The concentrations of two industrially produced chlorofluoromethanes, CCl 3 F(F-11) and CCl 2 F 2 (F-12), have been measured in the water column and in the marine atmosphere of the Greenland and Norwegian seas. Measurable concentrations of these two chlorofluoromethanes have penetrated to the deep basins of both of these regions, and the general characteristics of their vertical distributions are similar to those of the bomb-produced radioisotopes injected into the atmosphere on a similar time scale. The data have been fitted to a time-dependent box model based on deep convective mixing in the Greenland Sea and lateral exchange between the deep basins. The model calculations for the two chlorofluoromethanes in the Greenland Sea give similar results, with a time scale for deep convection of about 40 years. The time scale for lateral mixing between the deep Greenland Sea and the deep Norwegian Sea is estimated to be 20 to 30 years, although the agreement between the calculations for the two chlorofluoromethanes is limited by analytical uncertainties at the low concentrations found in the deep Norwegian Sea and by uncertainties in the model assumptions. Article in Journal/Newspaper Greenland Greenland Sea Norwegian Sea AAAS Resource Center (American Association for the Advancement of Science) Greenland Norwegian Sea Science 221 4607 265 268 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
The concentrations of two industrially produced chlorofluoromethanes, CCl 3 F(F-11) and CCl 2 F 2 (F-12), have been measured in the water column and in the marine atmosphere of the Greenland and Norwegian seas. Measurable concentrations of these two chlorofluoromethanes have penetrated to the deep basins of both of these regions, and the general characteristics of their vertical distributions are similar to those of the bomb-produced radioisotopes injected into the atmosphere on a similar time scale. The data have been fitted to a time-dependent box model based on deep convective mixing in the Greenland Sea and lateral exchange between the deep basins. The model calculations for the two chlorofluoromethanes in the Greenland Sea give similar results, with a time scale for deep convection of about 40 years. The time scale for lateral mixing between the deep Greenland Sea and the deep Norwegian Sea is estimated to be 20 to 30 years, although the agreement between the calculations for the two chlorofluoromethanes is limited by analytical uncertainties at the low concentrations found in the deep Norwegian Sea and by uncertainties in the model assumptions. |
format |
Article in Journal/Newspaper |
author |
Bullister, J. L. Weiss, R. F. |
spellingShingle |
Bullister, J. L. Weiss, R. F. Anthropogenic Chlorofluoromethanes in the Greenland and Norwegian Seas |
author_facet |
Bullister, J. L. Weiss, R. F. |
author_sort |
Bullister, J. L. |
title |
Anthropogenic Chlorofluoromethanes in the Greenland and Norwegian Seas |
title_short |
Anthropogenic Chlorofluoromethanes in the Greenland and Norwegian Seas |
title_full |
Anthropogenic Chlorofluoromethanes in the Greenland and Norwegian Seas |
title_fullStr |
Anthropogenic Chlorofluoromethanes in the Greenland and Norwegian Seas |
title_full_unstemmed |
Anthropogenic Chlorofluoromethanes in the Greenland and Norwegian Seas |
title_sort |
anthropogenic chlorofluoromethanes in the greenland and norwegian seas |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1983 |
url |
http://dx.doi.org/10.1126/science.221.4607.265 https://www.science.org/doi/pdf/10.1126/science.221.4607.265 |
geographic |
Greenland Norwegian Sea |
geographic_facet |
Greenland Norwegian Sea |
genre |
Greenland Greenland Sea Norwegian Sea |
genre_facet |
Greenland Greenland Sea Norwegian Sea |
op_source |
Science volume 221, issue 4607, page 265-268 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.221.4607.265 |
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Science |
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221 |
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4607 |
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265 |
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268 |
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1802644658147295232 |