abstract. - Meteoclimatic hazards induced by the expansion of the Siberian High over Eastern Europe. january 2010- a synoptic retrospect This paper reviews the general characteristics of the thermal regime of January 2010 at global scale, underlining the role of the Asian (Siberian) winter High in the occurrence of the temperature and pressure anomalies in the Northern Hemisphere, in correlation with the Arctic Oscillation. Also the aero-synoptic structure is described accounting for the expansion of the Siberian ridge over most of Europe, with major implications on the severity of the thermal regime in much of the continent, including Romania.
Key words: Asiatic High, Arctic Oscillation, thermal anomalies, frosty weather