14C Profiles in the Central Weddell Sea
14 C data from stations in the central Weddell Sea are presented and discussed using additional parameters (potential temperature, salinity and 3 He). The low 14 C concentrations of the surface water (≈-90‰) are explained by suppressed gas exchange due to ice cover during the winter and rapid turnov...
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Language: | English |
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Cambridge University Press (CUP)
1989
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Online Access: | http://dx.doi.org/10.1017/s0033822200012133 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822200012133 |
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crcambridgeupr:10.1017/s0033822200012133 2024-03-03T08:49:20+00:00 14C Profiles in the Central Weddell Sea Schlosser, Peter Kromer, Bernd Bayer, Reinhold Münnich, K O 1989 http://dx.doi.org/10.1017/s0033822200012133 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822200012133 en eng Cambridge University Press (CUP) Radiocarbon volume 31, issue 03, page 544-556 ISSN 0033-8222 1945-5755 General Earth and Planetary Sciences Archeology journal-article 1989 crcambridgeupr https://doi.org/10.1017/s0033822200012133 2024-02-08T08:31:06Z 14 C data from stations in the central Weddell Sea are presented and discussed using additional parameters (potential temperature, salinity and 3 He). The low 14 C concentrations of the surface water (≈-90‰) are explained by suppressed gas exchange due to ice cover during the winter and rapid turnover of the surface layer caused by entrainment of Warm Deep Water (WDW) with low 14 C concentrations. A simple time-dependent balance calculated for the Surface Water (SW) and the underlying Winter Water (WW) can reproduce the 14 C concentrations observed in these layers for 1985. The pre-bomb 14 C concentrations are estimated at ≈-130‰ for SW and −140‰ for WW. A strong deviation of the SW 14 C concentration observed in 1973 from the calculated value suggest a change in surface circulation and/or air/sea exchange during the period before the Weddell Polynya in 1974. The observed 14 C concentrations of the Weddell Sea Bottom Water (WSBW; −135 to −150‰) are only slightly higher than those of the WDW showing that the uptake of bomb 14 C in the Weddell Sea is limited. The 14 C profiles show a minimum at intermediate depths (≈ 1500m) which is caused by radioactive decay and/or penetration of bomb 14 C from shallow and deep layers (WDW and WSBW) into intermediate layers. Article in Journal/Newspaper Weddell Sea Cambridge University Press Weddell Sea Weddell Radiocarbon 31 03 544 556 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
General Earth and Planetary Sciences Archeology |
spellingShingle |
General Earth and Planetary Sciences Archeology Schlosser, Peter Kromer, Bernd Bayer, Reinhold Münnich, K O 14C Profiles in the Central Weddell Sea |
topic_facet |
General Earth and Planetary Sciences Archeology |
description |
14 C data from stations in the central Weddell Sea are presented and discussed using additional parameters (potential temperature, salinity and 3 He). The low 14 C concentrations of the surface water (≈-90‰) are explained by suppressed gas exchange due to ice cover during the winter and rapid turnover of the surface layer caused by entrainment of Warm Deep Water (WDW) with low 14 C concentrations. A simple time-dependent balance calculated for the Surface Water (SW) and the underlying Winter Water (WW) can reproduce the 14 C concentrations observed in these layers for 1985. The pre-bomb 14 C concentrations are estimated at ≈-130‰ for SW and −140‰ for WW. A strong deviation of the SW 14 C concentration observed in 1973 from the calculated value suggest a change in surface circulation and/or air/sea exchange during the period before the Weddell Polynya in 1974. The observed 14 C concentrations of the Weddell Sea Bottom Water (WSBW; −135 to −150‰) are only slightly higher than those of the WDW showing that the uptake of bomb 14 C in the Weddell Sea is limited. The 14 C profiles show a minimum at intermediate depths (≈ 1500m) which is caused by radioactive decay and/or penetration of bomb 14 C from shallow and deep layers (WDW and WSBW) into intermediate layers. |
format |
Article in Journal/Newspaper |
author |
Schlosser, Peter Kromer, Bernd Bayer, Reinhold Münnich, K O |
author_facet |
Schlosser, Peter Kromer, Bernd Bayer, Reinhold Münnich, K O |
author_sort |
Schlosser, Peter |
title |
14C Profiles in the Central Weddell Sea |
title_short |
14C Profiles in the Central Weddell Sea |
title_full |
14C Profiles in the Central Weddell Sea |
title_fullStr |
14C Profiles in the Central Weddell Sea |
title_full_unstemmed |
14C Profiles in the Central Weddell Sea |
title_sort |
14c profiles in the central weddell sea |
publisher |
Cambridge University Press (CUP) |
publishDate |
1989 |
url |
http://dx.doi.org/10.1017/s0033822200012133 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822200012133 |
geographic |
Weddell Sea Weddell |
geographic_facet |
Weddell Sea Weddell |
genre |
Weddell Sea |
genre_facet |
Weddell Sea |
op_source |
Radiocarbon volume 31, issue 03, page 544-556 ISSN 0033-8222 1945-5755 |
op_doi |
https://doi.org/10.1017/s0033822200012133 |
container_title |
Radiocarbon |
container_volume |
31 |
container_issue |
03 |
container_start_page |
544 |
op_container_end_page |
556 |
_version_ |
1792506540164382720 |