Articles | Volume 15, issue 3
Research article
09 May 2019
Research article |  | 09 May 2019

Cold vs. warm water route – sources for the upper limb of the Atlantic Meridional Overturning Circulation revisited in a high-resolution ocean model

Siren Rühs, Franziska U. Schwarzkopf, Sabrina Speich, and Arne Biastoch


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AR by Siren Rühs on behalf of the Authors (18 Mar 2019)  Author's response   Manuscript 
ED: Publish as is (21 Mar 2019) by A.J. George Nurser
AR by Siren Rühs on behalf of the Authors (31 Mar 2019)  Author's response   Manuscript 

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Short summary
We revisit the sources for the upper limb of the overturning circulation in the South Atlantic by tracking fluid particles in a high-resolution ocean model. Our results suggest that the upper limb’s transport is dominantly supplied by waters with Indian Ocean origin, but the contribution of waters with Pacific origin is substantially larger than previously estimated with coarse-resolution models. Yet, a large part of upper limb waters obtains thermohaline properties within the South Atlantic.