Abstract
The North Atlantic Oscillation (NAO) and the Arctic Oscillation (AO) have a strong influence on the European climate and reflect opposing variations of barometric pressure near Iceland and Azores and the strength of circumpolar vortex respectively. The dynamics of winter NAO indices causes long-term fluctuations of air temperature and hydrothermal regimes in Lithuania. The warm (cold) winters in Lithuania are related to the positive (negative) NAO phase. The correlation between the different NAO/AO indices and precipitation in Lithuania is weak. In Lithuania Hurrell’s NAO index appears to be the best temperature indicator during the cold season, except for November and a fairly good indicator for precipitation in January and March. The AO index becomes significant for local precipitation in it’s negative phase for January-February.
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