TY - JOUR T1 - Development of a two-way-coupled ocean–wave model: assessment on a global NEMO(v3.6)–WW3(v6.02) coupled configuration A1 - Couvelard,Xavier A1 - Lemarié,Florian A1 - Samson,Guillaume A1 - Redelsperger,Jean-Luc A1 - Ardhuin,Fabrice A1 - Benshila,Rachid A1 - Madec,Gurvan AD - Univ. Brest, CNRS, IRD, Ifremer, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, Brest, France AD - Univ. Grenoble Alpes, Inria, CNRS, Grenoble INP, LJK, 38000 Grenoble, France AD - Mercator Océan, Toulouse, France AD - LEGOS, University of Toulouse, CNES, CNRS, IRD, UPS, Toulouse, France AD - Sorbonne Universités (UPMC, Univ Paris 06)-CNRS-IRD-MNHN, LOCEAN Laboratory, Paris, France UR - https://archimer.ifremer.fr/doc/00512/62338/ DO - 10.5194/gmd-13-3067-2020 N2 - This paper describes the implementation of a coupling between a three-dimensional ocean general circulation model (NEMO) and a wave model (WW3) to represent the interactions of the upper oceanic flow dynamics with surface waves. The focus is on the impact of such coupling on upper-ocean properties (temperature and currents) and mixed-layer depths (MLD) at global eddying scales. A generic coupling interface has been developed and the NEMO governing equations and boundary conditions have been adapted to include wave-induced terms following the approach of McWilliams et al. (2004) and Ardhuin et al. (2008). In particular, the contributions of Stokes-Coriolis, Vortex and surface pressure forces have been implemented on top of the necessary modifications of the tracer/continuity equation and turbulent closure scheme (a 1-equation TKE closure here). To assess the new developments, we perform a set of sensitivity experiments with a global oceanic configuration at 1/4° resolution coupled with a wave model configured at 1/2° resolution. Numerical simulations show a global increase of wind-stress due to the interaction with waves (via the Charnock coefficient) particularly at high latitudes. The modifications brought to the TKE closure scheme and the inclusion of a parameterization for Langmuir turbulence lead to a significant increase of the mixing thus helping to deepen the MLD. This deepening is mainly located in the Southern Hemisphere and results in reduced sea-surface currents and temperatures. Y1 - 2020/07 PB - Copernicus GmbH JF - Geoscientific Model Development SN - 1991-959X VL - 13 IS - 7 SP - 3067 EP - 3090 ID - 62338 ER -