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Surface wind is a variable of great importance in forcing marine waves andcirculations, modulating surface fluxes, etc. Surface wind defined onnumerical grids is currently used in forecast-analysis, as well as inclimatology. Gridded fields, however, suffer for systematic errors associatedwith the numerical procedures adopted in computing them. In this paper theclimatology of surface wind produced by three different numerical models inthe European-Mediterranean area is analyzed. The systematic loss of power atthe smallest grid-scales appears in the power spectrum of all the differentmodels. Some prototype numerical integrations show that this systematicover-smoothing is due to numerical stabilization operators that represent themain source of the diagnosed error; the error progression in space and timeis also analyzed.  <b>Key words.</b> Meteorology and atmospheric dynamics(Mesoscale meteorology; Ocean-atmosphere interaction;Climatology

Surface winds in the Euro-Mediterranean area: the real resolution of numerical grids