South Atlantic overturning and heat transport variations in ocean reanalyses and observation-based estimates

Baker, Jonathan Andrew; Renshaw, Richard; Jackson, Laura Claire; Dubois, Clotilde; Iovino, Doroteaciro; Zuo, Hao; Perez, Renellys C.; Dong, Shenfu; Kersalé, Marion; Mayer, Michael; Mayer, Johannes; Speich, Sabrina; Lamont, Tarron

doi:https://doi.org/10.5194/sp-1-osr7-4-2023

Articles | Volume 1-osr7

https://doi.org/10.5194/sp-1-osr7-4-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Report:

7th edition of the Copernicus Ocean State Report (OSR7)

https://doi.org/10.5194/sp-1-osr7-4-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 1-osr7

27 Sep 2023

| OSR7 | Chapter 2.2

| 27 Sep 2023 | OSR7 | Chapter 2.2

South Atlantic overturning and heat transport variations in ocean reanalyses and observation-based estimates

Jonathan Andrew Baker, Richard Renshaw, Laura Claire Jackson, Clotilde Dubois, Doroteaciro Iovino, Hao Zuo, Renellys C. Perez, Shenfu Dong, Marion Kersalé, Michael Mayer, Johannes Mayer, Sabrina Speich, and Tarron Lamont

Supplement

https://doi.org/10.5194/sp-1-osr7-4-2023-supplement

Data sets

Global Ocean Ensemble Reanalysis EU Copernicus Marine Service Product https://doi.org/10.48670/moi-00024

Global Ocean Physics Reanalysis EU Copernicus Marine Service Product https://doi.org/10.48670/moi-00021

Mass-consistent atmospheric energy and moisture budget monthly data from 1979 to present derived from ERA5 reanalysis J. Mayer, M. Mayer, and L. Haimberger https://doi.org/10.24381/cds.c2451f6b

Reconstructions of the radiation fluxes at the top of the atmosphere and net surface energy flux over 1985-2017 - DEEP-C Version 4.0 C. Liu and R. Allan https://doi.org/10.17864/1947.271

Ocean Meridional Heat Transport Values, Version 1.0 K. E. Trenberth, Y. Zhang, J. T. Fasullo, and L. Cheng https://doi.org/10.5065/9v3y-fn61

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Short summary

We use ocean reanalyses, in which ocean models are combined with observations, to infer past changes in ocean circulation and heat transport in the South Atlantic. Comparing these estimates with other observation-based estimates, we find differences in their trends, variability, and mean heat transport but closer agreement in their mean overturning strength. Ocean reanalyses can help us understand the cause of these differences, which could improve estimates of ocean transports in this region.