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Mesoscale model such as Meso-Nh have proven to be highly reliable inreproducing 3D maps of optical turbulence (see Refs. 1, 2, 3, 4) abovemid-latitude astronomical sites. These last years ground-based astronomy hasbeen looking towards Antarctica. Especially its summits and the InternalContinental Plateau where the optical turbulence appears to be confined in ashallow layer close to the icy surface. Preliminary measurements have so farindicated pretty good value for the seeing above 30-35 m: 0.36" (see Ref. 5)and 0.27" (see Refs. 6, 7) at Dome C. Site testing campaigns are howeverextremely expensive, instruments provide only local measurements andatmospheric modelling might represent a step ahead towards the search andselection of astronomical sites thanks to the possibility to reconstruct 3D Cn2maps over a surface of several kilometers. The Antarctic Plateau representstherefore an important benchmark test to evaluate the possibility todiscriminate sites on the same plateau. Our group8 has proven that the analysesfrom the ECMWF global model do not describe with the required accuracy theantarctic boundary and surface layer in the plateau. A better description couldbe obtained with a mesoscale meteorological model. In this contribution wepresent the progress status report of numerical simulations (including theoptical turbulence - Cn2) obtained with Meso-Nh above the internal AntarcticPlateau. Among the topic attacked: the influence of different configurations ofthe model (low and high horizontal resolution), use of the grid-nestinginteractive technique, forecasting of the optical turbulence during some winternights.

Meso-Nh simulations of the atmospheric flow above the Internal Antarctic Plateau