Abstract

An analysis of the cross-correlation of the vectors of the upper wind at the principal isobaric surfaces over Milan, Udine, Rome, Cagliari and Brindisi, shows a marked anomaly in the wind field over Udine at 850 hPa. This is due to disturbances caused to the mesoscale circulation by the Alpine Chain. Over the summit of the Alps, the wind field is homogeneous over the whole of Italy, except near the tropopause. The correlation coefficient can be expressed as a function of the distance between the wind vectors considered on the same isobaric surface, by means of an exponential attenuation.

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