Prądy strumieniowe jako przyczyna powstawania turbulencji bezchmurnego nieba nad Europą

This paper analysis the criteria used to determine the occurrence of clear air turbulences (CAT) as phenomena connected with the location of jet streams. Next, using data from aerological measurements taken in the decade 1992-2001 at 67 stations over Europe and its margins the zones of strong streams in upper and middle troposphere are determined. The next step includes determinations of the areas of similar characteristics of jet stream occurrence, as phenomena, which influence development of CAT zones.