Impact of the North Atlantic Oscillation on long-term fluctuations of climatic indices

• Main Author: Bartkevičienė, Galina
• Format: Article in Journal/Newspaper
• Language: Lithuanian; English
• Published: 2004
• Subjects: Air temperature; Precipitation; NAO; North Atlantic; North Atlantic oscillation
• Online Access: http://lmavb.lvb.lt/LMAVB:ELABAPDB5398497&prefLang=en_US

The current article discusses the relationship between the North Atlantic Oscillation (NAO) and hydrothermic regime in Lithuania - i.e. the NAO impact on long-term fluctuations of air tempera­ture in 1864-2000 and the amount of precipitation in 1900-2000. The most informative NAO index of the three ones (NAO-1, NAO-2, andNAO-3), defining the influence of the North Atlantic atmospheric circulation processes on the climate of Lithuania, is being searched for. It has been determined that the dynamics of winter NAO indices reflects long-term winter air temperature fluctuations in Lithuania. Warm winters in Lithuania are related to the positive and cold ones - to the negative NAO phases. The NAO impact on the amount of precipitation manifests itself only in separate months, its seasonal differences being exhibited as well.