SPECTROMETRY 14C AGES MEASURED IN PLANKTONIC FORAMINIFERA: PALEOCEANOGRAPHIC IMPLICATIONS
International audience Carbon 14 dates obtained by accelerator mass spectrometry (AMS) on foraminiferal samples from deep-sea sediment cores must be corrected for the difference in 14C composition between the atmosphere and the sea surface. In the modem ocean, the "apparent age" of carbona...
Published in: | Paleoceanography |
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HAL CCSD
1988
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Online Access: | https://hal.science/hal-03549486 https://hal.science/hal-03549486/document https://hal.science/hal-03549486/file/Paleoceanography%20-%20December%201988%20-%20Bard%20-%20Correction%20of%20accelerator%20mass%20spectrometry%2014C%20ages%20measured%20in%20planktonic.pdf https://doi.org/10.1029/PA003i006p00635 |
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ftceafr:oai:HAL:hal-03549486v1 2024-04-28T08:29:19+00:00 SPECTROMETRY 14C AGES MEASURED IN PLANKTONIC FORAMINIFERA: PALEOCEANOGRAPHIC IMPLICATIONS Bard, Edouard Centre des Faibles Radioactivités Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) Lamont-Doherty Earth Observatory (LDEO) Columbia University New York 1988-12 https://hal.science/hal-03549486 https://hal.science/hal-03549486/document https://hal.science/hal-03549486/file/Paleoceanography%20-%20December%201988%20-%20Bard%20-%20Correction%20of%20accelerator%20mass%20spectrometry%2014C%20ages%20measured%20in%20planktonic.pdf https://doi.org/10.1029/PA003i006p00635 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/PA003i006p00635 hal-03549486 https://hal.science/hal-03549486 https://hal.science/hal-03549486/document https://hal.science/hal-03549486/file/Paleoceanography%20-%20December%201988%20-%20Bard%20-%20Correction%20of%20accelerator%20mass%20spectrometry%2014C%20ages%20measured%20in%20planktonic.pdf doi:10.1029/PA003i006p00635 info:eu-repo/semantics/OpenAccess ISSN: 0883-8305 Paleoceanography https://hal.science/hal-03549486 Paleoceanography, 1988, 3 (6), pp.635-645. ⟨10.1029/PA003i006p00635⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 1988 ftceafr https://doi.org/10.1029/PA003i006p00635 2024-04-04T01:39:58Z International audience Carbon 14 dates obtained by accelerator mass spectrometry (AMS) on foraminiferal samples from deep-sea sediment cores must be corrected for the difference in 14C composition between the atmosphere and the sea surface. In the modem ocean, the "apparent age" of carbonate shells formed in surface waters varies between 300 and 1200 years and depends mainly on latitude. The time variation of this parameter during climate oscillations of the last 40,000 years may have been significant: there should have been small changes for most of the ocean between 40øS and 40øN, but an increase of the apparent age by several hundred years should be expected at high latitudes in response to subpolar/subtropical front movements. The North Atlantic is likely to have experienced the most significant changes, due to large variations in the mode and rate of North Atlantic Deep Water production. These hypothetical changes may be measured by coupled AMS 14C dating of contemporaneous planktonic foraminifera and terrestrial organic matter (pollen, charcoal, wood, etc.) which occur in the same core or are stratigraphically linked by the same volcanic ash layer. The A(14C atmosphere, 14C sea surface) can be viewed as a new paleoceanographic tracer which may provide additional information about high latitude surface waters complementary to those obtained with 13C/12C and Cd/Ca ratios measured in planktonic foraminifera. Article in Journal/Newspaper North Atlantic Deep Water North Atlantic Planktonic foraminifera HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Paleoceanography 3 6 635 645 |
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Open Polar |
collection |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Bard, Edouard SPECTROMETRY 14C AGES MEASURED IN PLANKTONIC FORAMINIFERA: PALEOCEANOGRAPHIC IMPLICATIONS |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Carbon 14 dates obtained by accelerator mass spectrometry (AMS) on foraminiferal samples from deep-sea sediment cores must be corrected for the difference in 14C composition between the atmosphere and the sea surface. In the modem ocean, the "apparent age" of carbonate shells formed in surface waters varies between 300 and 1200 years and depends mainly on latitude. The time variation of this parameter during climate oscillations of the last 40,000 years may have been significant: there should have been small changes for most of the ocean between 40øS and 40øN, but an increase of the apparent age by several hundred years should be expected at high latitudes in response to subpolar/subtropical front movements. The North Atlantic is likely to have experienced the most significant changes, due to large variations in the mode and rate of North Atlantic Deep Water production. These hypothetical changes may be measured by coupled AMS 14C dating of contemporaneous planktonic foraminifera and terrestrial organic matter (pollen, charcoal, wood, etc.) which occur in the same core or are stratigraphically linked by the same volcanic ash layer. The A(14C atmosphere, 14C sea surface) can be viewed as a new paleoceanographic tracer which may provide additional information about high latitude surface waters complementary to those obtained with 13C/12C and Cd/Ca ratios measured in planktonic foraminifera. |
author2 |
Centre des Faibles Radioactivités Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) Lamont-Doherty Earth Observatory (LDEO) Columbia University New York |
format |
Article in Journal/Newspaper |
author |
Bard, Edouard |
author_facet |
Bard, Edouard |
author_sort |
Bard, Edouard |
title |
SPECTROMETRY 14C AGES MEASURED IN PLANKTONIC FORAMINIFERA: PALEOCEANOGRAPHIC IMPLICATIONS |
title_short |
SPECTROMETRY 14C AGES MEASURED IN PLANKTONIC FORAMINIFERA: PALEOCEANOGRAPHIC IMPLICATIONS |
title_full |
SPECTROMETRY 14C AGES MEASURED IN PLANKTONIC FORAMINIFERA: PALEOCEANOGRAPHIC IMPLICATIONS |
title_fullStr |
SPECTROMETRY 14C AGES MEASURED IN PLANKTONIC FORAMINIFERA: PALEOCEANOGRAPHIC IMPLICATIONS |
title_full_unstemmed |
SPECTROMETRY 14C AGES MEASURED IN PLANKTONIC FORAMINIFERA: PALEOCEANOGRAPHIC IMPLICATIONS |
title_sort |
spectrometry 14c ages measured in planktonic foraminifera: paleoceanographic implications |
publisher |
HAL CCSD |
publishDate |
1988 |
url |
https://hal.science/hal-03549486 https://hal.science/hal-03549486/document https://hal.science/hal-03549486/file/Paleoceanography%20-%20December%201988%20-%20Bard%20-%20Correction%20of%20accelerator%20mass%20spectrometry%2014C%20ages%20measured%20in%20planktonic.pdf https://doi.org/10.1029/PA003i006p00635 |
genre |
North Atlantic Deep Water North Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Deep Water North Atlantic Planktonic foraminifera |
op_source |
ISSN: 0883-8305 Paleoceanography https://hal.science/hal-03549486 Paleoceanography, 1988, 3 (6), pp.635-645. ⟨10.1029/PA003i006p00635⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/PA003i006p00635 hal-03549486 https://hal.science/hal-03549486 https://hal.science/hal-03549486/document https://hal.science/hal-03549486/file/Paleoceanography%20-%20December%201988%20-%20Bard%20-%20Correction%20of%20accelerator%20mass%20spectrometry%2014C%20ages%20measured%20in%20planktonic.pdf doi:10.1029/PA003i006p00635 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/PA003i006p00635 |
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Paleoceanography |
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3 |
container_issue |
6 |
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635 |
op_container_end_page |
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