Articles | Volume 17, issue 1
https://doi.org/10.5194/gmd-17-117-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/gmd-17-117-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Development and technical paper
| 
09 Jan 2024
Development and technical paper |
| 09 Jan 2024
| 09 Jan 2024
The wave-age-dependent stress parameterisation (WASP) for momentum and heat turbulent fluxes at sea in SURFEX v8.1
Marie-Noëlle Bouin
CORRESPONDING AUTHOR
CNRM, University of Toulouse, Météo-France, CNRS, Toulouse, France
University of Brest, CNRS, Ifremer, IRD, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, Plouzané, France
Cindy Lebeaupin Brossier
CNRM, University of Toulouse, Météo-France, CNRS, Toulouse, France
Sylvie Malardel
Laboratoire de l’Atmosphère et des Cyclones, University of La Réunion, CNRS, Météo-France, Saint-Denis, France
Aurore Voldoire
CNRM, University of Toulouse, Météo-France, CNRS, Toulouse, France
César Sauvage
CNRM, University of Toulouse, Météo-France, CNRS, Toulouse, France
now at: Physical Oceanography Department, Woods Hole Oceanographic Institution, Woods Hole, MA, USA
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A kilometre-scale coupled ocean–atmosphere simulation is used to study the impact of a medicane on the oceanic upper layer. The processes responsible for the surface cooling are comparable to those of weak tropical cyclones. The oceanic response is influenced by the dynamics of the central Mediterranean. In particular, a cyclonic eddy leads to weaker cooling. Heavy rain occuring early in the event creates a salinity barrier layer, reinforcing the effects of the surface fluxes on the cooling.
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Short summary
In numerical models, the turbulent exchanges of heat and momentum at the air–sea interface are not represented explicitly but with parameterisations depending on the surface parameters. A new parameterisation of turbulent fluxes (WASP) has been implemented in the surface model SURFEX v8.1 and validated on four case studies. It combines a close fit to observations including cyclonic winds, a dependency on the wave growth rate, and the possibility of being used in atmosphere–wave coupled models.
In numerical models, the turbulent exchanges of heat and momentum at the air–sea interface are...
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