A fluctuation in the atmospheric pressure difference between the Icelandic Low and the Azores High that strongly shapes winter weather across the North Atlantic and Europe, with a positive phase bringing a stronger jet stream, wetter conditions in northern Europe and milder winters, and a negative phase reversing the pattern. It is among the most influential and closely tracked climate patterns affecting the region.
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1. North Atlantic oscillation - Wikipedia
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It is one of the most important manifestations of climate fluctuations in the North Atlantic
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