"98e5a7e4-b946-474a-8214-c1b7b3e5f976" . "ARCTIC OSCILLATION"^^ . "The Arctic Oscillation (AO) is the dominant pattern of non-seasonal\nsea-level pressure (SLP) variations north of 20N, and it is\ncharacterized by SLP anomalies of one sign in the Arctic and anomalies\nof opposite sign centered about 37-45N. Additional information is\navailable for the Arctic Oscillation (AO) and for the North Atlantic\nOscillation (NAO), a close relative of the AO \n(http://jisao.washington.edu/ao/)"^^ . .