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You are here: Home / Extras / Glossary / Atlantic Multidecadal Oscillation (“AMO”) Oscillation Atlantique Multi-Décennale (“AMO”)

Atlantic Multidecadal Oscillation (“AMO”) Oscillation Atlantique Multi-Décennale (“AMO”)

28 Nov 2004 by group

A multidecadal (50-80 year timescale) pattern of North Atlantic ocean-atmosphere variability whose existence has been argued for based on statistical analyses of observational and proxy climate data, and coupled Atmosphere-Ocean General Circulation Model (“AOGCM”) simulations. This pattern is believed to describe some of the observed early 20th century (1920s-1930s) high-latitude Northern Hemisphere warming and some, but not all, of the high-latitude warming observed in the late 20th century. The term was introduced in a summary by Kerr (2000) of a study by Delworth and Mann (2000).
Mode de variabilité de l’océan et atmosphère de l’Atlantique Nord a l’échelle de temps multi-décennale (50 a 70 ans). Ce mode a été décrit sur la base d’analyses statistiques de données climatiques instrumentales et reconstruites par des proxies, ainsi que de simulations numériques de modèles couplés Océan-Atmosphère. Ce mode de variabilité contient une partie du réchauffement aux hautes latitudes de l’hémisphère Nord dans le début du 20ème siècle (années 1920-1930), et également en partie (mais pas tout) du réchauffement aux hautes latitudes observé a la fin du 20ème siècle. Ce terme a été employé pour la première fois par R.Kerr dans un résumé de l’étude de Delworth et Mann (2000).

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