Meaning of North Atlantic Oscillation in English:

North Atlantic Oscillation

noun

Meteorology
  • A non-periodic variation in surface atmospheric pressure over the North Atlantic, associated with permanent regions of low pressure over Iceland and high pressure over the Azores, which affects winter weather patterns in Europe and eastern North America; an index of this, which is positive when the pressure difference between the two regions is great, and negative when it is less marked.

Origin

1920s.