Reduced ventilation and enhanced magnitude of the deep Pacific carbon pool during the last glacial period
It has been proposed that the ventilation of the deep Pacific carbon pool was not significantly reduced during the last glacial period, posing a problem for canonical theories of glacial-interglacial CO2 change. However, using radiocarbon dates of marine tephra deposited off New Zealand, we show tha...
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ftarchimer:oai:archimer.ifremer.fr:46279 2023-05-15T18:25:07+02:00 Reduced ventilation and enhanced magnitude of the deep Pacific carbon pool during the last glacial period Skinner, L. Mccave, I. N. Carter, L. Fallon, S. Scrivner, A. E. Primeau, F. 2015-02 application/pdf https://archimer.ifremer.fr/doc/00352/46279/46041.pdf https://doi.org/10.1016/j.epsl.2014.11.024 https://archimer.ifremer.fr/doc/00352/46279/ eng eng Elsevier Science Bv https://archimer.ifremer.fr/doc/00352/46279/46041.pdf doi:10.1016/j.epsl.2014.11.024 https://archimer.ifremer.fr/doc/00352/46279/ 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). info:eu-repo/semantics/openAccess restricted use CC-BY Earth And Planetary Science Letters (0012-821X) (Elsevier Science Bv), 2015-02 , Vol. 411 , P. 45-52 radiocarbon ocean ventilation carbon cycling palaeoceanography text Publication info:eu-repo/semantics/article 2015 ftarchimer https://doi.org/10.1016/j.epsl.2014.11.024 2021-09-23T20:28:47Z It has been proposed that the ventilation of the deep Pacific carbon pool was not significantly reduced during the last glacial period, posing a problem for canonical theories of glacial-interglacial CO2 change. However, using radiocarbon dates of marine tephra deposited off New Zealand, we show that deep(>2000 m) and shallow sub-surface ocean-atmosphere C-14 age offsets (i.e. 'reservoir-' or 'ventilation' ages) in the southwest Pacific increased by similar to 1089 and 337 yrs respectively, reaching similar to 2689 and similar to 1037 yrs during the late glacial. A comparison with other radiocarbon data from the southern high-latitudes suggests that broadly similar changes were experienced right across the Southern Ocean. If, like today, the Southern Ocean was the main source of water to the glacial ocean interior, these observations would imply a significant change in the global radiocarbon inventory during the last glacial period, possibly equivalent to an increase in the average radiocarbon age >2 km of similar to 700 yrs. Simple mass balance arguments and numerical model sensitivity tests suggest that such a change in the ocean's mean radiocarbon age would have had a major impact on the marine carbon inventory and atmospheric CO2, possibly accounting for nearly half of the glacial-interglacial CO2 change. If confirmed, these findings would underline the special role of high latitude shallow sub-surface mixing and air-sea gas exchange in regulating atmospheric CO2 during the late Pleistocene. Article in Journal/Newspaper Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) New Zealand Pacific Southern Ocean Earth and Planetary Science Letters 411 45 52 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
radiocarbon ocean ventilation carbon cycling palaeoceanography |
spellingShingle |
radiocarbon ocean ventilation carbon cycling palaeoceanography Skinner, L. Mccave, I. N. Carter, L. Fallon, S. Scrivner, A. E. Primeau, F. Reduced ventilation and enhanced magnitude of the deep Pacific carbon pool during the last glacial period |
topic_facet |
radiocarbon ocean ventilation carbon cycling palaeoceanography |
description |
It has been proposed that the ventilation of the deep Pacific carbon pool was not significantly reduced during the last glacial period, posing a problem for canonical theories of glacial-interglacial CO2 change. However, using radiocarbon dates of marine tephra deposited off New Zealand, we show that deep(>2000 m) and shallow sub-surface ocean-atmosphere C-14 age offsets (i.e. 'reservoir-' or 'ventilation' ages) in the southwest Pacific increased by similar to 1089 and 337 yrs respectively, reaching similar to 2689 and similar to 1037 yrs during the late glacial. A comparison with other radiocarbon data from the southern high-latitudes suggests that broadly similar changes were experienced right across the Southern Ocean. If, like today, the Southern Ocean was the main source of water to the glacial ocean interior, these observations would imply a significant change in the global radiocarbon inventory during the last glacial period, possibly equivalent to an increase in the average radiocarbon age >2 km of similar to 700 yrs. Simple mass balance arguments and numerical model sensitivity tests suggest that such a change in the ocean's mean radiocarbon age would have had a major impact on the marine carbon inventory and atmospheric CO2, possibly accounting for nearly half of the glacial-interglacial CO2 change. If confirmed, these findings would underline the special role of high latitude shallow sub-surface mixing and air-sea gas exchange in regulating atmospheric CO2 during the late Pleistocene. |
format |
Article in Journal/Newspaper |
author |
Skinner, L. Mccave, I. N. Carter, L. Fallon, S. Scrivner, A. E. Primeau, F. |
author_facet |
Skinner, L. Mccave, I. N. Carter, L. Fallon, S. Scrivner, A. E. Primeau, F. |
author_sort |
Skinner, L. |
title |
Reduced ventilation and enhanced magnitude of the deep Pacific carbon pool during the last glacial period |
title_short |
Reduced ventilation and enhanced magnitude of the deep Pacific carbon pool during the last glacial period |
title_full |
Reduced ventilation and enhanced magnitude of the deep Pacific carbon pool during the last glacial period |
title_fullStr |
Reduced ventilation and enhanced magnitude of the deep Pacific carbon pool during the last glacial period |
title_full_unstemmed |
Reduced ventilation and enhanced magnitude of the deep Pacific carbon pool during the last glacial period |
title_sort |
reduced ventilation and enhanced magnitude of the deep pacific carbon pool during the last glacial period |
publisher |
Elsevier Science Bv |
publishDate |
2015 |
url |
https://archimer.ifremer.fr/doc/00352/46279/46041.pdf https://doi.org/10.1016/j.epsl.2014.11.024 https://archimer.ifremer.fr/doc/00352/46279/ |
geographic |
New Zealand Pacific Southern Ocean |
geographic_facet |
New Zealand Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Earth And Planetary Science Letters (0012-821X) (Elsevier Science Bv), 2015-02 , Vol. 411 , P. 45-52 |
op_relation |
https://archimer.ifremer.fr/doc/00352/46279/46041.pdf doi:10.1016/j.epsl.2014.11.024 https://archimer.ifremer.fr/doc/00352/46279/ |
op_rights |
2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.epsl.2014.11.024 |
container_title |
Earth and Planetary Science Letters |
container_volume |
411 |
container_start_page |
45 |
op_container_end_page |
52 |
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1766206347514216448 |