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HOME > Climate & Weather Linkage > Teleconnections > Pacific-North America Pattern > Observation of Seasonal (JFM) mean Pacific-North America Pattern
 
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Seasonal mean (January-February-March) Pacific-North America Oscillation index. Click image to enlarge.
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The standardized seasonal mean PNA index during cold season (blue line) is constructed by averaging the monthly PNA 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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Page last modified: December 12, 2005
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