Increased input of circumpolar deep water-borne detritus to the glacial SE Atlantic Ocean
[1] Analysis of radiogenic isotopes in marine sediments can provide useful information on the provenance and transport of detrital material, directly relevant to paleoceanographic investigations. Here we show that the detrital Nd isotopic composition of recent SE Atlantic marine sediments matches th...
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Online Access: | https://archimer.ifremer.fr/doc/00000/10190/9912.pdf https://doi.org/10.1029/2002GC000371 https://archimer.ifremer.fr/doc/00000/10190/ |
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ftarchimer:oai:archimer.ifremer.fr:10190 2023-05-15T17:13:50+02:00 Increased input of circumpolar deep water-borne detritus to the glacial SE Atlantic Ocean Bayon, Germain German, Cr Nesbitt, Rw Bertrand, P Schneider, Rr 2003-03 application/pdf https://archimer.ifremer.fr/doc/00000/10190/9912.pdf https://doi.org/10.1029/2002GC000371 https://archimer.ifremer.fr/doc/00000/10190/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00000/10190/9912.pdf doi:10.1029/2002GC000371 https://archimer.ifremer.fr/doc/00000/10190/ 2003 AGU info:eu-repo/semantics/openAccess restricted use Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2003-03 , Vol. 4 , P. - neodymium isotopes detrital fractions South Atlantic deep water circulation IMAGES marine geology and geophysics : marine sediments processes and transport oceanography : general : paleoceanography text Publication info:eu-repo/semantics/article 2003 ftarchimer https://doi.org/10.1029/2002GC000371 2021-09-23T20:18:03Z [1] Analysis of radiogenic isotopes in marine sediments can provide useful information on the provenance and transport of detrital material, directly relevant to paleoceanographic investigations. Here we show that the detrital Nd isotopic composition of recent SE Atlantic marine sediments matches the complex modern-day hydrography. In these same cores, glacial-interglacial isotopic variations are consistent with previous investigations (using different paleoceanographic proxies), which have shown that the relative influence of North Atlantic Deep Water (NADW) into the South Atlantic was reduced during glacial periods. In a novel departure, however, we also calculate the mass accumulation rates of terrigenous material delivered by each of Circumpolar Deep Water (CDW) and NADW to demonstrate that the accumulation of detritus delivered by CDW was enhanced significantly in the glacial South Atlantic. This enhanced transport flux could be explained by an increased flow of CDW into the glacial South Atlantic and/or an increased concentration of suspended terrigenous material transported by glacial CDW. Article in Journal/Newspaper NADW North Atlantic Deep Water North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Geochemistry, Geophysics, Geosystems 4 3 |
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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 |
neodymium isotopes detrital fractions South Atlantic deep water circulation IMAGES marine geology and geophysics : marine sediments processes and transport oceanography : general : paleoceanography |
spellingShingle |
neodymium isotopes detrital fractions South Atlantic deep water circulation IMAGES marine geology and geophysics : marine sediments processes and transport oceanography : general : paleoceanography Bayon, Germain German, Cr Nesbitt, Rw Bertrand, P Schneider, Rr Increased input of circumpolar deep water-borne detritus to the glacial SE Atlantic Ocean |
topic_facet |
neodymium isotopes detrital fractions South Atlantic deep water circulation IMAGES marine geology and geophysics : marine sediments processes and transport oceanography : general : paleoceanography |
description |
[1] Analysis of radiogenic isotopes in marine sediments can provide useful information on the provenance and transport of detrital material, directly relevant to paleoceanographic investigations. Here we show that the detrital Nd isotopic composition of recent SE Atlantic marine sediments matches the complex modern-day hydrography. In these same cores, glacial-interglacial isotopic variations are consistent with previous investigations (using different paleoceanographic proxies), which have shown that the relative influence of North Atlantic Deep Water (NADW) into the South Atlantic was reduced during glacial periods. In a novel departure, however, we also calculate the mass accumulation rates of terrigenous material delivered by each of Circumpolar Deep Water (CDW) and NADW to demonstrate that the accumulation of detritus delivered by CDW was enhanced significantly in the glacial South Atlantic. This enhanced transport flux could be explained by an increased flow of CDW into the glacial South Atlantic and/or an increased concentration of suspended terrigenous material transported by glacial CDW. |
format |
Article in Journal/Newspaper |
author |
Bayon, Germain German, Cr Nesbitt, Rw Bertrand, P Schneider, Rr |
author_facet |
Bayon, Germain German, Cr Nesbitt, Rw Bertrand, P Schneider, Rr |
author_sort |
Bayon, Germain |
title |
Increased input of circumpolar deep water-borne detritus to the glacial SE Atlantic Ocean |
title_short |
Increased input of circumpolar deep water-borne detritus to the glacial SE Atlantic Ocean |
title_full |
Increased input of circumpolar deep water-borne detritus to the glacial SE Atlantic Ocean |
title_fullStr |
Increased input of circumpolar deep water-borne detritus to the glacial SE Atlantic Ocean |
title_full_unstemmed |
Increased input of circumpolar deep water-borne detritus to the glacial SE Atlantic Ocean |
title_sort |
increased input of circumpolar deep water-borne detritus to the glacial se atlantic ocean |
publisher |
Amer Geophysical Union |
publishDate |
2003 |
url |
https://archimer.ifremer.fr/doc/00000/10190/9912.pdf https://doi.org/10.1029/2002GC000371 https://archimer.ifremer.fr/doc/00000/10190/ |
genre |
NADW North Atlantic Deep Water North Atlantic |
genre_facet |
NADW North Atlantic Deep Water North Atlantic |
op_source |
Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2003-03 , Vol. 4 , P. - |
op_relation |
https://archimer.ifremer.fr/doc/00000/10190/9912.pdf doi:10.1029/2002GC000371 https://archimer.ifremer.fr/doc/00000/10190/ |
op_rights |
2003 AGU info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2002GC000371 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
4 |
container_issue |
3 |
_version_ |
1766071032558387200 |