North Atlantic oscillation
The North Atlantic oscillation is a climatic phenomenon in the North Atlantic Ocean. It controls the strength and direction of westerly winds and storms' tracks over the Atlantic Basin. It was discovered during the 1920s by Sir Gilbert Walker.
North Atlantic Oscillation Media
Winter index of the NAO based on the difference of normalized sea level pressure (SLP) between Gibraltar and Iceland since 1823, with a loess smoothing (black)