Statistical linkages between ENSO, NAO, and regional climate

It has been demonstrated that large scale oscillation phenomena (e.g., ENSO, NAO, PNA,...) have a great importance in influencing many climatic variables at different regions of the Earth. These phenomena do not take place independently, however, the mechanisms and interrelationships are not completely understood so far. The main idea of this paper is to describe statistical linkages between the large scale atmospheric oscillations and regional climate parameters. In order to understand the circulation and temperature structure over the Atlantic European region an analysis of atmospheric macrocirculation patterns (MCPs) is carried out via a conditional probability framework. The frequency distributions of regional MCP classes (constructed by Hess and Brezowsky, and Peczely) under different phases of large-scale oscillations are examined. Focusing on the Carpathian Basin, ENSO related regional climate analysis is carried out. Finally, lag correlation analysis are presented to compare local precipitation, regional temperature anomaly time series and different NAO indices (Jones, Hurrell, spatial SST differences).