NAO Index for the period 1823 - 2002 (see sub-indicator for seasonal values for the years 1993 - 2002)

Figure Created 12 Nov 2009 Published 12 Nov 2009 Last modified 29 Nov 2012
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The index is normalised to a mean value (December-March) over the whole period



Additional information

A positive index means mild and rainy winters in mid and northern Europe and relatively dry winters in southern Europe. A negative index leads to cold and dry winters in mid and northern and moist winters in southern Europe.

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