Velocity field of a Rossby vortex: comparison of the numerical solution with the Gaussian model. Top row: values issued from the simulation of the radial velocity, the azimuthal velocity V−V₀(r), and the Rossby number, from left to right, respectively. Bottom row: residual difference between the numerical data and the values issued from the model for the radial and azimuthal velocities and for the Rossby number, from left to right, respectively (see text for details).