Improving Antarctic Bottom Water precursors in NEMO for climate applications

Hutchinson, Katherine; Deshayes, Julie; Éthé, Christian; Rousset, Clément; de Lavergne, Casimir; Vancoppenolle, Martin; Jourdain, Nicolas C.; Mathiot, Pierre

doi:https://doi.org/10.5194/gmd-16-3629-2023

Articles | Volume 16, issue 12

https://doi.org/10.5194/gmd-16-3629-2023

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

Special issue:

Nucleus for European Modelling of the Ocean - NEMO

https://doi.org/10.5194/gmd-16-3629-2023

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

Articles | Volume 16, issue 12

Model experiment description paper

|

30 Jun 2023

Model experiment description paper |

| 30 Jun 2023

Improving Antarctic Bottom Water precursors in NEMO for climate applications

Katherine Hutchinson, Julie Deshayes, Christian Éthé, Clément Rousset, Casimir de Lavergne, Martin Vancoppenolle, Nicolas C. Jourdain, and Pierre Mathiot

Supplement

https://doi.org/10.5194/gmd-16-3629-2023-supplement

Data sets

Physical oceanography on board of POLARSTERN (1983-11-22 to 2016-02-14) Gerd Rohardt, Eberhard Fahrbach, Agnieszka Beszczynska-Möller, Antje Boetius, Jutta Brunßen, Gereon Budéus, Boris Cisewski, RalphEngbrodt, Steffen Gauger, Walter Geibert, Patrizia Geprägs, Dieter Gerdes, Rainer Gersonde, Arnold Gordon, Hartmut Hellmer, Enrique Isla, Stanley Jacobs, Markus Janout, Wilfried Jokat, Michael Klages, Gerhard Kuhn, Jens Meincke, Sven Ober, Svein Østerhus, Ray Peterson, Benjamin Rabe, Bert Rudels, Ursula Schauer, Michael Schröder, Jüri Sildam, Thomas Soltwedel, Elena Stangeew, Manfred Stein, Volker Strass, Jörn Thiede, Sandra Tippenhauer, Cornelis Veth, Wilken-Jon von Appen, Marie-France Weirig, Andreas Wisotzki, Dieter A. Wolf-Gladrow, and Torsten Kanzow https://doi.org/10.1594/PANGAEA.860066

Fifty-year changes of the world ocean's surface layer in response to climate change (Version v2) Jean-Baptiste Sallée, Violaine Pellichero, Camille Akhoudas, Etienne Pauthenet, Lucie Vignes, Sunke Schmidtko, Alberto Naveira Garabato, Peter Sutherland, and Mikael Kuusela https://doi.org/10.5281/zenodo.5776180

An eddy-permitting Southern Ocean state estimate (http://sose.ucsd.edu/sose_stateestimation_data_05to10.html) Matthew R. Mazloff, Patrick Heimbach, and Carl Wunsch https://doi.org/10.1175/2009JPO4236.1

CMIP5 model intercomparison of freshwater budget and circulation in the North Atlantic (https://www.whoi.edu/science/PO/pago/) Julie Deshayes, Ruth Curry, and Rym Msadek https://doi.org/10.1175/JCLI-D-12-00700.1

World Ocean Database 2018 T. P. Boyer, O. K. Baranova, C. Coleman, H. E. Garcia, A. Grodsky, R. A. Locarnini, A. V. Mishonov, C. R. Paver, J. R. Reagan, D. Seidov, I. V. Smolyar, K. Weathers, and M. Zweng https://www.nodc.noaa.gov/OC5/WOD/pr_wod.html

Model code and software

NEMO v4.2 eORCA1 data with RIS, FRIS and LCIS explicit Katherine Hutchinson, Julie Deshayes, Christian Éthé, Clement Rousset, Casimir de Lavergne, Martin Vancoppenolle, Nicolas C. Jourdain, and Pierre Mathiot https://doi.org/10.5281/zenodo.7561767

Short summary

Bottom Water constitutes the lower half of the ocean’s overturning system and is primarily formed in the Weddell and Ross Sea in the Antarctic due to interactions between the atmosphere, ocean, sea ice and ice shelves. Here we use a global ocean 1° resolution model with explicit representation of the three large ice shelves important for the formation of the parent waters of Bottom Water. We find doing so reduces salt biases, improves water mass realism and gives realistic ice shelf melt rates.