Seabird Abstracts
North Atlantic Oscillation (NAO)
Species - Authors - Colonies - Keywords


  • Climate Prediction Centre - North Atlantic Oscillation
  • Wikipedia - North Atlantic Oscillation is a weather phenomenon in the North Atlantic Ocean of fluctuations in the difference of atmospheric pressure at sea level between the Icelandic low and the Azores high. Through fluctuations in the strength of the Icelandic low and the Azores high, it controls the strength and direction of westerly winds and storm tracks across the North Atlantic. It is part of the Arctic oscillation, and varies over time with no particular periodicity. The NAO was discovered through several studies in the late 19th and early 20th centuries. Unlike the El Niņo-Southern Oscillation phenomenon in the Pacific Ocean, the NAO is a largely atmospheric mode. It is one of the most important manifestations of climate fluctuations in the North Atlantic and surrounding humid climates.