Articles | Volume 15, issue 20
https://doi.org/10.5194/gmd-15-7683-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-15-7683-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
A modeling framework to understand historical and projected ocean climate change in large coupled ensembles
LOCEAN-IPSL, Laboratoire d’Océanographie et du Climat, Expérimentation et Approches Numériques, Sorbonne Université/CNRS/IRD/MNHN, Paris, France
Clément Rousset
LOCEAN-IPSL, Laboratoire d’Océanographie et du Climat, Expérimentation et Approches Numériques, Sorbonne Université/CNRS/IRD/MNHN, Paris, France
Eric Guilyardi
LOCEAN-IPSL, Laboratoire d’Océanographie et du Climat, Expérimentation et Approches Numériques, Sorbonne Université/CNRS/IRD/MNHN, Paris, France
NCAS-Climate, University of Reading, Reading, UK
Jean-Baptiste Sallée
LOCEAN-IPSL, Laboratoire d’Océanographie et du Climat, Expérimentation et Approches Numériques, Sorbonne Université/CNRS/IRD/MNHN, Paris, France
Juliette Mignot
LOCEAN-IPSL, Laboratoire d’Océanographie et du Climat, Expérimentation et Approches Numériques, Sorbonne Université/CNRS/IRD/MNHN, Paris, France
Christian Ethé
IPSL (Institut Pierre-Simon Laplace), Sorbonne Université, CNRS, Paris, France
Gurvan Madec
LOCEAN-IPSL, Laboratoire d’Océanographie et du Climat, Expérimentation et Approches Numériques, Sorbonne Université/CNRS/IRD/MNHN, Paris, France
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Clément Bricaud, Julien Le Sommer, Gurvan Madec, Christophe Calone, Julie Deshayes, Christian Ethe, Jérôme Chanut, and Marina Levy
Geosci. Model Dev., 13, 5465–5483, https://doi.org/10.5194/gmd-13-5465-2020, https://doi.org/10.5194/gmd-13-5465-2020, 2020
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In order to reduce the cost of ocean biogeochemical models, a multi-grid approach where ocean dynamics and tracer transport are computed with different spatial resolution has been developed in the NEMO v3.6 OGCM. Different experiments confirm that the spatial resolution of hydrodynamical fields can be coarsened without significantly affecting the resolved passive tracer fields. This approach leads to a factor of 7 reduction of the overhead associated with running a full biogeochemical model.
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Short summary
A modeling framework is introduced to understand and decompose the mechanisms causing the ocean temperature, salinity and circulation to change since the pre-industrial period and into 21st century scenarios of global warming. This framework aims to look at the response to changes in the winds and in heat and freshwater exchanges at the ocean interface in global climate models, throughout the 1850–2100 period, to unravel their individual effects on the changing physical structure of the ocean.
A modeling framework is introduced to understand and decompose the mechanisms causing the ocean...