Refined modeling and 14C plateau tuning reveal consistent patterns of glacial and deglacial 14C reservoir ages of surface waters in low-latitude Atlantic
Modeling studies predict that changes in radiocarbon (C-14) reservoir ages of surface waters during the last deglacial episode will reflect changes in both atmospheric C-14 concentration and ocean circulation including the Atlantic Meridional Overturning Circulation. Tests of these models require th...
Published in: | Paleoceanography |
---|---|
Main Authors: | , , , |
Format: | Text |
Language: | English |
Published: |
Amer Geophysical Union
|
Subjects: | |
Online Access: | https://doi.org/10.1002/2016PA002953 https://archimer.ifremer.fr/doc/00421/53227/54789.pdf https://archimer.ifremer.fr/doc/00421/53227/54790.pdf https://archimer.ifremer.fr/doc/00421/53227/ |
id |
fttriple:oai:gotriple.eu:10670/1.r8585d |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:10670/1.r8585d 2023-05-15T13:47:33+02:00 Refined modeling and 14C plateau tuning reveal consistent patterns of glacial and deglacial 14C reservoir ages of surface waters in low-latitude Atlantic Balmer, Sven Sarnthein, Michael Mudelsee, Manfred Grootes, Pieter M. https://doi.org/10.1002/2016PA002953 https://archimer.ifremer.fr/doc/00421/53227/54789.pdf https://archimer.ifremer.fr/doc/00421/53227/54790.pdf https://archimer.ifremer.fr/doc/00421/53227/ en eng Amer Geophysical Union doi:10.1002/2016PA002953 10670/1.r8585d https://archimer.ifremer.fr/doc/00421/53227/54789.pdf https://archimer.ifremer.fr/doc/00421/53227/54790.pdf https://archimer.ifremer.fr/doc/00421/53227/ other Archimer, archive institutionnelle de l'Ifremer Paleoceanography (0883-8305) (Amer Geophysical Union), 2016-08 , Vol. 31 , N. 8 , P. 1030-1040 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1002/2016PA002953 2023-01-22T18:02:36Z Modeling studies predict that changes in radiocarbon (C-14) reservoir ages of surface waters during the last deglacial episode will reflect changes in both atmospheric C-14 concentration and ocean circulation including the Atlantic Meridional Overturning Circulation. Tests of these models require the availability of accurate C-14 reservoir ages in well-dated late Quaternary time series. We here test two models using plateau-tuned C-14 time series in multiple well-placed sediment core age-depth sequences throughout the lower latitudes of the Atlantic Ocean. C-14 age plateau tuning in glacial and deglacial sequences provides accurate calendar year ages that differ by as much as 500-2500years from those based on assumed global reservoir ages around 400years. This study demonstrates increases in local Atlantic surface reservoir ages of up to 1000years during the Last Glacial Maximum, ages that reflect stronger trades off Benguela and summer winds off southern Brazil. By contrast, surface water reservoir ages remained close to zero in the Cariaco Basin in the southern Caribbean due to lagoon-style isolation and persistently strong atmospheric CO2 exchange. Later, during the early deglacial (16ka) reservoir ages decreased to a minimum of 170-420 (14)Cyears throughout the South Atlantic, likely in response to the rapid rise in atmospheric pCO(2) and Antarctic temperatures occurring then. Changes in magnitude and geographic distribution of C-14 reservoir ages of peak glacial and deglacial surface waters deviate from the results of Franke et al. (2008) but are generally consistent with those of the more advanced ocean circulation model of Butzin et al. (2012). Text Antarc* Antarctic Unknown Antarctic Paleoceanography 31 8 1030 1040 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir Balmer, Sven Sarnthein, Michael Mudelsee, Manfred Grootes, Pieter M. Refined modeling and 14C plateau tuning reveal consistent patterns of glacial and deglacial 14C reservoir ages of surface waters in low-latitude Atlantic |
topic_facet |
geo envir |
description |
Modeling studies predict that changes in radiocarbon (C-14) reservoir ages of surface waters during the last deglacial episode will reflect changes in both atmospheric C-14 concentration and ocean circulation including the Atlantic Meridional Overturning Circulation. Tests of these models require the availability of accurate C-14 reservoir ages in well-dated late Quaternary time series. We here test two models using plateau-tuned C-14 time series in multiple well-placed sediment core age-depth sequences throughout the lower latitudes of the Atlantic Ocean. C-14 age plateau tuning in glacial and deglacial sequences provides accurate calendar year ages that differ by as much as 500-2500years from those based on assumed global reservoir ages around 400years. This study demonstrates increases in local Atlantic surface reservoir ages of up to 1000years during the Last Glacial Maximum, ages that reflect stronger trades off Benguela and summer winds off southern Brazil. By contrast, surface water reservoir ages remained close to zero in the Cariaco Basin in the southern Caribbean due to lagoon-style isolation and persistently strong atmospheric CO2 exchange. Later, during the early deglacial (16ka) reservoir ages decreased to a minimum of 170-420 (14)Cyears throughout the South Atlantic, likely in response to the rapid rise in atmospheric pCO(2) and Antarctic temperatures occurring then. Changes in magnitude and geographic distribution of C-14 reservoir ages of peak glacial and deglacial surface waters deviate from the results of Franke et al. (2008) but are generally consistent with those of the more advanced ocean circulation model of Butzin et al. (2012). |
format |
Text |
author |
Balmer, Sven Sarnthein, Michael Mudelsee, Manfred Grootes, Pieter M. |
author_facet |
Balmer, Sven Sarnthein, Michael Mudelsee, Manfred Grootes, Pieter M. |
author_sort |
Balmer, Sven |
title |
Refined modeling and 14C plateau tuning reveal consistent patterns of glacial and deglacial 14C reservoir ages of surface waters in low-latitude Atlantic |
title_short |
Refined modeling and 14C plateau tuning reveal consistent patterns of glacial and deglacial 14C reservoir ages of surface waters in low-latitude Atlantic |
title_full |
Refined modeling and 14C plateau tuning reveal consistent patterns of glacial and deglacial 14C reservoir ages of surface waters in low-latitude Atlantic |
title_fullStr |
Refined modeling and 14C plateau tuning reveal consistent patterns of glacial and deglacial 14C reservoir ages of surface waters in low-latitude Atlantic |
title_full_unstemmed |
Refined modeling and 14C plateau tuning reveal consistent patterns of glacial and deglacial 14C reservoir ages of surface waters in low-latitude Atlantic |
title_sort |
refined modeling and 14c plateau tuning reveal consistent patterns of glacial and deglacial 14c reservoir ages of surface waters in low-latitude atlantic |
publisher |
Amer Geophysical Union |
url |
https://doi.org/10.1002/2016PA002953 https://archimer.ifremer.fr/doc/00421/53227/54789.pdf https://archimer.ifremer.fr/doc/00421/53227/54790.pdf https://archimer.ifremer.fr/doc/00421/53227/ |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Archimer, archive institutionnelle de l'Ifremer Paleoceanography (0883-8305) (Amer Geophysical Union), 2016-08 , Vol. 31 , N. 8 , P. 1030-1040 |
op_relation |
doi:10.1002/2016PA002953 10670/1.r8585d https://archimer.ifremer.fr/doc/00421/53227/54789.pdf https://archimer.ifremer.fr/doc/00421/53227/54790.pdf https://archimer.ifremer.fr/doc/00421/53227/ |
op_rights |
other |
op_doi |
https://doi.org/10.1002/2016PA002953 |
container_title |
Paleoceanography |
container_volume |
31 |
container_issue |
8 |
container_start_page |
1030 |
op_container_end_page |
1040 |
_version_ |
1766247293562912768 |