Modeling variations of marine reservoir ages during the last 45 000 years
International audience When dating marine samples with 14 C, the reservoir-age effect is usually assumed to be constant, although atmospheric 14 C production rate and ocean circulation changes cause temporal and spatial reservoir-age variations. These lead to dating errors, which can limit the inter...
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ftccsdartic:oai:HAL:hal-00298205v1 2023-11-12T04:26:40+01:00 Modeling variations of marine reservoir ages during the last 45 000 years Franke, J. Paul, A. Schulz, M Department of Geosciences 2008-01-25 https://hal.science/hal-00298205 https://hal.science/hal-00298205/document https://hal.science/hal-00298205/file/cpd-4-81-2008.pdf en eng HAL CCSD European Geosciences Union (EGU) hal-00298205 https://hal.science/hal-00298205 https://hal.science/hal-00298205/document https://hal.science/hal-00298205/file/cpd-4-81-2008.pdf info:eu-repo/semantics/OpenAccess ISSN: 1814-9340 EISSN: 1814-9359 Climate of the Past Discussions https://hal.science/hal-00298205 Climate of the Past Discussions, 2008, 4 (1), pp.81-110 [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2008 ftccsdartic 2023-10-21T23:15:18Z International audience When dating marine samples with 14 C, the reservoir-age effect is usually assumed to be constant, although atmospheric 14 C production rate and ocean circulation changes cause temporal and spatial reservoir-age variations. These lead to dating errors, which can limit the interpretation of cause and effect in paleoclimate data. We used a global ocean circulation model forced by transient atmospheric ? 14 C variations to calculate reservoir ages for the last 45 000 years for a present day-like and a last glacial maximum-like ocean circulation. A ~30% reduced Atlantic meridonal overturning circulation leads to increased reservoir ages by up to ~500 years in high latitudes. Temporal variations are proportional to the absolute value of the reservoir age; regions with large reservoir age also show large variation. Temporal variations range between ~300 years in parts of the subtropics and ~1000 years in the Southern Ocean. For tropical regions, which are generally assumed to have nearly stable reservoir ages, the model suggests variations of several hundred years. Article in Journal/Newspaper Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Southern Ocean |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
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[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Franke, J. Paul, A. Schulz, M Modeling variations of marine reservoir ages during the last 45 000 years |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience When dating marine samples with 14 C, the reservoir-age effect is usually assumed to be constant, although atmospheric 14 C production rate and ocean circulation changes cause temporal and spatial reservoir-age variations. These lead to dating errors, which can limit the interpretation of cause and effect in paleoclimate data. We used a global ocean circulation model forced by transient atmospheric ? 14 C variations to calculate reservoir ages for the last 45 000 years for a present day-like and a last glacial maximum-like ocean circulation. A ~30% reduced Atlantic meridonal overturning circulation leads to increased reservoir ages by up to ~500 years in high latitudes. Temporal variations are proportional to the absolute value of the reservoir age; regions with large reservoir age also show large variation. Temporal variations range between ~300 years in parts of the subtropics and ~1000 years in the Southern Ocean. For tropical regions, which are generally assumed to have nearly stable reservoir ages, the model suggests variations of several hundred years. |
author2 |
Department of Geosciences |
format |
Article in Journal/Newspaper |
author |
Franke, J. Paul, A. Schulz, M |
author_facet |
Franke, J. Paul, A. Schulz, M |
author_sort |
Franke, J. |
title |
Modeling variations of marine reservoir ages during the last 45 000 years |
title_short |
Modeling variations of marine reservoir ages during the last 45 000 years |
title_full |
Modeling variations of marine reservoir ages during the last 45 000 years |
title_fullStr |
Modeling variations of marine reservoir ages during the last 45 000 years |
title_full_unstemmed |
Modeling variations of marine reservoir ages during the last 45 000 years |
title_sort |
modeling variations of marine reservoir ages during the last 45 000 years |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/hal-00298205 https://hal.science/hal-00298205/document https://hal.science/hal-00298205/file/cpd-4-81-2008.pdf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 1814-9340 EISSN: 1814-9359 Climate of the Past Discussions https://hal.science/hal-00298205 Climate of the Past Discussions, 2008, 4 (1), pp.81-110 |
op_relation |
hal-00298205 https://hal.science/hal-00298205 https://hal.science/hal-00298205/document https://hal.science/hal-00298205/file/cpd-4-81-2008.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782340563873300480 |