Coupling an ocean wave model to an atmospheric general circulation model |
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| Authors: | Susanne L Weber Hans von Storch Pedro Viterbo Liana Zambresky |
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| Institution: | (1) Royal Netherlands Meteorological Institute, NL-3730 AE de Bilt, The Netherlands;(2) Max-Planck-Institute for Meteorology, Hamburg, Germany;(3) European Centre for Medium-Range Weather Forecasts Reading, Great Britain;(4) GKSS Research Centre, Geesthacht, Germany |
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| Abstract: | A coupled model, consisting of an ocean wave model and an atmospheric general circulation model (AGCM), is integrated under permanent July conditions. The wave model is forced by the AGCM wind stress, whereas the wind waves modify the AGCM surface fluxes of momentum, sensible and latent heat. We investigate the following aspects of the coupled model: how realistic are the wave fields, how strong is the coupling, and how sensitive is the atmospheric circulation to the spatially and temporally varying wave field. The wave climatology of the coupled model compares favorably with observational data. The interaction between the two models is largest (although weak) in the storm track in the Southern Hemisphere. Young windsea, which is associated with enhanced surface fluxes is generated mostly in the equatorward  frontal area of an individual cyclone. However, the enhancement of the surface fluxes is too small to significantly modify the climatological mean atmospheric circulation.This paper was presented at the Second International Conference on Modelling of Global Climate Variability, held in Hamburg 7–11 September 1992 under the auspices of the Max Planck Institute for Meteorology. Guest Editor for these papers is L. Dümenil |
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