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

The index is normalised to a mean value (December-March) over the whole period

https://www.eea.europa.eu/data-and-maps/figures/nao-index-for-the-period-1823-2002-see-sub-indicator-for-seasonal-values-for-the-years-1993-2002/figure1.gif/image_large

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01 Jan 2002

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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.