The Northern Annular Mode ( NAM ) is also known as the Arctic oscillation ( AO )
Basic knowledge of climate can be used within shorter term weather forecasting using knowledge about climatic cycles such as the El Ni�o�Southern Oscillation ( ENSO ) , the Madden�Julian oscillation ( MJO ) , the North Atlantic oscillation ( NAO ) , the Northern Annular Mode ( NAM ) which is also known as the Arctic oscillation ( AO ) , the Pacific decadal oscillation ( PDO ) , and the Interdecadal Pacific Oscillation ( IPO ) .
Climatology