Increased input of circumpolar deep water-borne detritus to the glacial SE Atlantic Ocean - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Geochemistry, Geophysics, Geosystems Année : 2003

Increased input of circumpolar deep water-borne detritus to the glacial SE Atlantic Ocean

Germain Bayon
Christopher R. German
  • Fonction : Auteur
Robert W. Nesbitt
  • Fonction : Auteur
Ralph R. Schneider
  • Fonction : Auteur

Résumé

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.
Fichier principal
Vignette du fichier
Geochem Geophys Geosyst - 2003 - Bayon - Increased input of circumpolar deep water%u2010borne detritus to the glacial SE.pdf (944.06 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

insu-03619026 , version 1 (24-03-2022)

Licence

Copyright (Tous droits réservés)

Identifiants

Citer

Germain Bayon, Christopher R. German, Robert W. Nesbitt, Philippe Bertrand, Ralph R. Schneider. Increased input of circumpolar deep water-borne detritus to the glacial SE Atlantic Ocean. Geochemistry, Geophysics, Geosystems, 2003, 4, ⟨10.1029/2002GC000371⟩. ⟨insu-03619026⟩
26 Consultations
19 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More