Late Quaternary Deep Water Circulation in the South Atlantic: Reconstruction from Carbonate Dissolution and Benthic Stable Isotopes

1996 ◽  
pp. 599-620 ◽  
Author(s):  
T. Bickert ◽  
G. Wefer
Keyword(s):  
Stable Isotopes ◽  
Deep Water ◽  
Late Quaternary ◽  
South Atlantic ◽  
Water Circulation ◽  
Carbonate Dissolution ◽  
The South

Deep-sea ostracods from the South Atlantic sector of the Southern Ocean during the last 370,000 years

2009 ◽  
Vol 83 (6) ◽  
pp. 914-930 ◽  
Author(s):  
Moriaki Yasuhara ◽  
Thomas M. Cronin ◽  
Gene Hunt ◽  
David A. Hodell
Keyword(s):  
Southern Ocean ◽  
Deep Water ◽  
Deep Sea ◽  
South Atlantic ◽  
Water Circulation ◽  
Interglacial Period ◽  
The South ◽  
Ocean Drilling Program ◽  
Atlantic Sector ◽  
Quaternary Climate

We report changes of deep-sea ostracod fauna during the last 370,000 yr from the Ocean Drilling Program (ODP) Hole 704A in the South Atlantic sector of the Southern Ocean. The results show that faunal changes are coincident with glacial/interglacial-scale deep-water circulation changes, even though our dataset is relatively small and the waters are barren of ostracods until mid-MIS (Marine Isotope Stage) 5.KritheandPoseidonamicuswere dominant during the Holocene interglacial period and the latter part of MIS 5, when this site was under the influence of North Atlantic Deep Water (NADW). Conversely,HenryhowellaandLegitimocytherewere dominant during glacial periods, when this site was in the path of Circumpolar Deep Water (CPDW). Three new species (Aversovalva brandaoae, Poseidonamicus hisayoae, andKrithe mazziniae) are described herein. This is the first report of Quaternary glacial/interglacial scale deep-sea ostracod faunal changes in the Southern and South Atlantic Oceans, a key region for understanding Quaternary climate and deep-water circulation, although the paucity of Quaternary ostracods in this region necessitates further research.

New Deep Water Frontiers in the South Atlantic Equatorial Margins

2013 ◽  
Author(s):  
Marcio Rocha Mello ◽  
Tikae Takaki ◽  
Carlos Alberto Fontes ◽  
Webster Mohriak ◽  
Silvana Maria Barbanti ◽  
...  
Keyword(s):  
Deep Water ◽  
South Atlantic ◽  
The South
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