North Atlantic Oscillation - Positive Index (IMAGE)

University of Miami Rosenstiel School of Marine, Atmospheric, and Earth Science

North Atlantic Oscillation - Positive Index

Caption

The Positive NAO index phase shows a stronger than usual subtropical high pressure center and a deeper than normal Icelandic low. The increased pressure difference results in more and stronger winter storms crossing the Atlantic Ocean on a more northerly track. This results in warm and wet winters in Europe and in cold and dry winters in northern Canada and Greenland. The eastern US experiences mild and wet winter conditions.

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Columbia University Lamont-Doherty Earth Observatory.

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