Romanova G. Impact of North Atlantic atmospheric processes on weather pattern over Ukraine.

The technique based on the joint use of principal component analysis and wavelet analysis was developed. Such an approach allows combining the possibility to reveal the spatial features of the former and to reveal the temporal ones by the latter. It is shown quantitatively that changes in weather pattern over the North Atlantic and Eastern Europe occur coherently when weather processes over these regions are intense. It is revealed that the presence of blocking anticyclone in the North Atlantic causes its absence over Ukraine. If blocking anticyclone is located northeastward of Ukraine, largest variability of humidity index field was observed close to Ukraine. Dangerous storm surges on Azov Sea occur more frequently at blocking, when a cyclone is located over Black and Azov seas. It is shown that the NAO impacts dominantly spatiotemporal variability of European total ozone content at synoptic time and spatial scales.