Abstract
A high-resolution objective analysis has been applied to conventional and satellite retrieved temperature profiles to investigate differences among the two sets of data. The case study selected represents the first stages of a rapid cyclone development in the lee of the Alps. It is found, both in statistical and qualitative terms, that satellite data are in good agreement with conventional ones and that a detailed description of the temperature field at surface is of primary importance for an accurate retrieval of satellite soundings, particularly for use in mesoscale meteorology. The time lag between the two different data sets is found to explain a consistent portion of the discrepancies and therefore a full quadridimensional assimilation scheme appears to be essential to pursue the investigation.
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