The origin of Intermediate and Subpolar Mode Waters crossing the Atlantic equator in OCCAM

The origin of the intermediate waters that cross the equatorial Atlantic as part of the return flow for North Atlantic Deep Water was studied in a high resolution global ocean model using a Lagrangian particle following technique. Most of these waters are subducted in the southeast Indian Ocean. Les...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Drijfhout, S.S., Donners, J., de Ruijter, W.P.M.
Format: Article in Journal/Newspaper
Language:unknown
Published: 2005
Subjects:
Antarctic
The Antarctic
Drake Passage
Indian
Antarc*
North Atlantic Deep Water
North Atlantic
Online Access:https://eprints.soton.ac.uk/349162/
Description
Summary:The origin of the intermediate waters that cross the equatorial Atlantic as part of the return flow for North Atlantic Deep Water was studied in a high resolution global ocean model using a Lagrangian particle following technique. Most of these waters are subducted in the southeast Indian Ocean. Less than twenty percent comes directly from Drake Passage without looping into the Indian Ocean; the majority being provided by Agulhas leakage. Most of the intermediate waters that subduct in the South Atlantic do not follow the South Atlantic/Indian Ocean supergyre, but remain within the Antarctic Circumpolar Current, and gradually transform into Circumpolar Deep Water by diapycnal mixing.

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