NCAR Climate Data Guide Content with Tag: NAM

Hurrell wintertime SLP-based Northern Annular Mode (NAM) Index
Years of Record: 1899/01 to 2021/03
The NAM (or Arctic Oscillation) is defined as the first EOF of NH (20°-90°N) winter SLP data. It explains 23% of the extended winter mean (December-March) variance, and it is clearly dominated by the NAO structure in the Atlantic sector. Although there are some subtle differences from the NAO...
Main variables and Earth System components:
Formats: ascii Timestep: Seasonal Domain: Atlantic Ocean, NH - Northern Hemisphere, Pacific Ocean
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