Arctic Oscillation

noun

Definition of Arctic Oscillation 

climatology

: the recurring movement of high pressure systems in the atmosphere from the middle latitudes to the polar latitudes and back abbreviation AO — compare north atlantic oscillation, southern oscillation

First Known Use of Arctic Oscillation

1998, in the meaning defined above

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The first known use of Arctic Oscillation was in 1998

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occurring twice a year or every two years

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