Arctic Oscillation Index

The loading pattern of the AO is defined by CPC as the leading mode of Empirical Orthogonal Function (EOF) analysis of monthly mean 1000mb height during 1979-2000 period.

Current ao

-0.602

Current Phase - (September)

Neutral

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Anomalies

Jan
Negative
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Neutral
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Positive
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Feb
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Mar
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Apr
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May
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Jun
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Jul
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Aug
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Sep
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Oct
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Nov
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Dec
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Skill Scores

Jan
Negative
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Neutral
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Positive
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Feb
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Mar
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Apr
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May
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Jun
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Jul
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Aug
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Sep
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Oct
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Nov
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Dec
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