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HOME > Climate & Weather Linkage > Teleconnections > Arctic Oscillation > Observation of Seasonal (JFM) mean Arctic Oscillation
 
 
Seasonal mean (January-February-March) Arctic Oscillation index. Click image to enlarge.
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The standardized seasonal mean AO index during cold season (blue line) is constructed by averaging the monthly AO index for January, February and March for each year. The black line denotes the standardized five-year running mean of the index. Both curves are standardized using 1950-2000 base period statistics


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