Articles | Volume 15, issue 3
Ocean Sci., 15, 489–512, 2019
Ocean Sci., 15, 489–512, 2019
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 et al.

Related authors

A 334-year coral record of surface temperature and salinity variability in the greater Agulhas Current region
Jens Zinke, Takaaki K. Watanabe, Siren Rühs, Miriam Pfeiffer, Stefan Grab, Dieter Garbe-Schönberg, and Arne Biastoch
Clim. Past, 18, 1453–1474,,, 2022
Short summary
Exceptional freshening and cooling in the eastern subpolar North Atlantic caused by reduced Labrador Sea surface heat loss
Alan D. Fox, Arne Biastoch, Stuart A. Cunningham, Neil Fraser, Patricia Handmann, N. Penny Holliday, Clare Johnson, Torge Martin, Marilena Oltmanns, Willi Rath, Siren Rühs, Alejandra Sanchez-Franks, and Christina Schmidt
Ocean Sci. Discuss.,,, 2022
Revised manuscript accepted for OS
Short summary
Regional imprints of changes in the Atlantic Meridional Overturning Circulation in the eddy-rich ocean model VIKING20X
Arne Biastoch, Franziska U. Schwarzkopf, Klaus Getzlaff, Siren Rühs, Torge Martin, Markus Scheinert, Tobias Schulzki, Patricia Handmann, Rebecca Hummels, and Claus W. Böning
Ocean Sci., 17, 1177–1211,,, 2021
Short summary
Characteristics and robustness of Agulhas leakage estimates: an inter-comparison study of Lagrangian methods
Christina Schmidt, Franziska U. Schwarzkopf, Siren Rühs, and Arne Biastoch
Ocean Sci., 17, 1067–1080,,, 2021
Short summary
Simulating the spread of disinfection by-products and anthropogenic bromoform emissions from ballast water discharge in Southeast Asia
Josefine Maas, Susann Tegtmeier, Birgit Quack, Arne Biastoch, Jonathan V. Durgadoo, Siren Rühs, Stephan Gollasch, and Matej David
Ocean Sci., 15, 891–904,,, 2019
Short summary

Related subject area

Depth range: All Depths | Approach: Numerical Models | Geographical range: Deep Seas: South Atlantic | Phenomena: Current Field
South Atlantic meridional transports from NEMO-based simulations and reanalyses
Davi Mignac, David Ferreira, and Keith Haines
Ocean Sci., 14, 53–68,,, 2018
Short summary

Cited articles

Ansorge, I. J., Speich, S., Lutjeharms, J. R., Göni, G. J., Rautenbach, C. J., Froneman, P. W., Rouault, M., and Garzoli, S.: Monitoring the oceanic flow between Africa and Antarctica: Report of the first GoodHope cruise, S. Afr. J. Sci., 101, 29–35, 2005. a
Amante, C. and Eakins, B. W.: ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis, NOAA Technical Memorandum NESDIS NGDC-24, National Geophysical Data Center, NOAA,, 2009. a
Arakawa, A. and Hsu, Y.-J. G.: Energy Conserving and Potential-Enstrophy Dissipating Schemes for the Shallow Water Equations, Mon. Weather Rev., 118, 1960–1969, 1990. a
Backeberg, B. C., Penven, P., and Rouault, M.: Impact of intensified Indian Ocean winds on mesoscale variability in the Agulhas system, Nat. Clim. Change, 2, 608–612,, 2012. a
Barnier, B., Madec, G., and Penduff, T.: Impact of partial steps and momentum advection schemes in a global ocean circulation model at eddy-permitting resolution, Ocean Dynam., 56, 543–567,, 2006. a

The requested paper has a corresponding corrigendum published. Please read the corrigendum first before downloading the article.

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.