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Highly variable upper and abyssal overturning cells in the South Atlantic
Kersale, Marion Meinen, Christopher S. Perez, Renellys C. Le Henaff, Matthieu Valla, Daniel Lamont, Tarron Sato, Olga Dong, Shenfu Terre, Thierry van Caspel, Mathias
Kersale, Marion
Meinen, Christopher S.
Perez, Renellys C.
Le Henaff, Matthieu
Valla, Daniel
Lamont, Tarron
Sato, Olga
Dong, Shenfu
Terre, Thierry
van Caspel, Mathias
Date
2020-08-05
Author
Kersale, Marion
Meinen, Christopher S.
Perez, Renellys C.
Le Henaff, Matthieu
Valla, Daniel
Lamont, Tarron
Sato, Olga
Dong, Shenfu
Terre, Thierry
van Caspel, Mathias
Chidichimo, Maria Paz
van den Berg, Marcel
Speich, Sabrina
Piola, Alberto
Campos, Edmo
Ansorge, Isabelle
Volkov, Denis
Lumpkin, Rick
Garzoli, Silvia
Meinen, Christopher S.
Perez, Renellys C.
Le Henaff, Matthieu
Valla, Daniel
Lamont, Tarron
Sato, Olga
Dong, Shenfu
Terre, Thierry
van Caspel, Mathias
Chidichimo, Maria Paz
van den Berg, Marcel
Speich, Sabrina
Piola, Alberto
Campos, Edmo
Ansorge, Isabelle
Volkov, Denis
Lumpkin, Rick
Garzoli, Silvia
Advisor
Type
Peer-Reviewed
Article
Published version
Article
Published version
Degree
Citations
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eaba7573.full.pdf
Adobe PDF, 1.57 MB
Description
Abstract
The Meridional Overturning Circulation (MOC) is a primary mechanism driving oceanic heat redistribution on Earth, thereby affecting Earth's climate and weather. However, the full-depth structure and variability of the MOC are still poorly understood, particularly in the South Atlantic. This study presents unique multiyear records of the oceanic volume transport of both the upper (<~3100 meters) and abyssal (>~3100 meters) overturning cells based on daily moored measurements in the South Atlantic at 34.5°S. The vertical structure of the time-mean flows is consistent with the limited historical observations. Both the upper and abyssal cells exhibit a high degree of variability relative to the temporal means at time scales, ranging from a few days to a few weeks. Observed variations in the abyssal flow appear to be largely independent of the flow in the overlying upper cell. No meaningful trends are detected in either cell.