Holocene Atlantic climate variations deduced from carbonate periplatform sediments (leeward margin, Great Bahama Bank)
A marine sediment core from the leeward margin of Great Bahama Bank (GBB) was subjected to a multiproxy study. The aragonite dominated core MD992201 comprises the past 7230 years in a decadal time resolution and shows sedimentation rates of up to 13.8 m/kyr. Aragonite mass accumulation rates, age di...
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Amer Geophysical Union
2004
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Online Access: | https://archimer.ifremer.fr/doc/00229/33981/32331.pdf https://doi.org/10.1029/2003PA000885 https://archimer.ifremer.fr/doc/00229/33981/ |
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ftarchimer:oai:archimer.ifremer.fr:33981 2023-05-15T17:33:07+02:00 Holocene Atlantic climate variations deduced from carbonate periplatform sediments (leeward margin, Great Bahama Bank) Roth, S Reijmer, Jjg 2004-01 application/pdf https://archimer.ifremer.fr/doc/00229/33981/32331.pdf https://doi.org/10.1029/2003PA000885 https://archimer.ifremer.fr/doc/00229/33981/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00229/33981/32331.pdf doi:10.1029/2003PA000885 https://archimer.ifremer.fr/doc/00229/33981/ Copyright 2004 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use Paleoceanography (0883-8305) (Amer Geophysical Union), 2004-01 , Vol. 19 , N. PA1003 , P. 1-14 Holocene climate Great Bahama Bank Atlantic circulation text Publication info:eu-repo/semantics/article 2004 ftarchimer https://doi.org/10.1029/2003PA000885 2021-09-23T20:25:14Z A marine sediment core from the leeward margin of Great Bahama Bank (GBB) was subjected to a multiproxy study. The aragonite dominated core MD992201 comprises the past 7230 years in a decadal time resolution and shows sedimentation rates of up to 13.8 m/kyr. Aragonite mass accumulation rates, age differences between planktonic foraminifera and aragonite sediments, and temperature distribution are used to deduce changes in aragonite production rates and paleocurrent strengths. Aragonite precipitation rates on GBB are controlled by exchange of carbonate ions and CO2 loss due to temperature-salinity conditions and biological activity, and these are dependent on the current strength. Paleocurrent strengths on GBB show high current velocities during the periods 6000 - 5100 years BP, 3500 - 2700 years BP, and 1600 - 700 years BP; lower current speeds existed during the time intervals 5100 - 3500 years BP, 2700 - 1600 years BP, and 700 - 100 years BP. Bahamian surface currents are directly linked to the North Atlantic atmospheric circulation, and thus periods with high ( low) current speeds are proposed to be phases of strong ( weak) atmospheric circulation. Article in Journal/Newspaper North Atlantic Planktonic foraminifera Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Paleoceanography 19 1 n/a n/a |
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 |
Holocene climate Great Bahama Bank Atlantic circulation |
spellingShingle |
Holocene climate Great Bahama Bank Atlantic circulation Roth, S Reijmer, Jjg Holocene Atlantic climate variations deduced from carbonate periplatform sediments (leeward margin, Great Bahama Bank) |
topic_facet |
Holocene climate Great Bahama Bank Atlantic circulation |
description |
A marine sediment core from the leeward margin of Great Bahama Bank (GBB) was subjected to a multiproxy study. The aragonite dominated core MD992201 comprises the past 7230 years in a decadal time resolution and shows sedimentation rates of up to 13.8 m/kyr. Aragonite mass accumulation rates, age differences between planktonic foraminifera and aragonite sediments, and temperature distribution are used to deduce changes in aragonite production rates and paleocurrent strengths. Aragonite precipitation rates on GBB are controlled by exchange of carbonate ions and CO2 loss due to temperature-salinity conditions and biological activity, and these are dependent on the current strength. Paleocurrent strengths on GBB show high current velocities during the periods 6000 - 5100 years BP, 3500 - 2700 years BP, and 1600 - 700 years BP; lower current speeds existed during the time intervals 5100 - 3500 years BP, 2700 - 1600 years BP, and 700 - 100 years BP. Bahamian surface currents are directly linked to the North Atlantic atmospheric circulation, and thus periods with high ( low) current speeds are proposed to be phases of strong ( weak) atmospheric circulation. |
format |
Article in Journal/Newspaper |
author |
Roth, S Reijmer, Jjg |
author_facet |
Roth, S Reijmer, Jjg |
author_sort |
Roth, S |
title |
Holocene Atlantic climate variations deduced from carbonate periplatform sediments (leeward margin, Great Bahama Bank) |
title_short |
Holocene Atlantic climate variations deduced from carbonate periplatform sediments (leeward margin, Great Bahama Bank) |
title_full |
Holocene Atlantic climate variations deduced from carbonate periplatform sediments (leeward margin, Great Bahama Bank) |
title_fullStr |
Holocene Atlantic climate variations deduced from carbonate periplatform sediments (leeward margin, Great Bahama Bank) |
title_full_unstemmed |
Holocene Atlantic climate variations deduced from carbonate periplatform sediments (leeward margin, Great Bahama Bank) |
title_sort |
holocene atlantic climate variations deduced from carbonate periplatform sediments (leeward margin, great bahama bank) |
publisher |
Amer Geophysical Union |
publishDate |
2004 |
url |
https://archimer.ifremer.fr/doc/00229/33981/32331.pdf https://doi.org/10.1029/2003PA000885 https://archimer.ifremer.fr/doc/00229/33981/ |
genre |
North Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Planktonic foraminifera |
op_source |
Paleoceanography (0883-8305) (Amer Geophysical Union), 2004-01 , Vol. 19 , N. PA1003 , P. 1-14 |
op_relation |
https://archimer.ifremer.fr/doc/00229/33981/32331.pdf doi:10.1029/2003PA000885 https://archimer.ifremer.fr/doc/00229/33981/ |
op_rights |
Copyright 2004 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2003PA000885 |
container_title |
Paleoceanography |
container_volume |
19 |
container_issue |
1 |
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n/a |
_version_ |
1766131507497271296 |