Fil:Winter-NAO-Index.png

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  • Description: North Atlantic Oscillation (NAO) index. Year is on the x-axis (1900–2005), and the standardised principal-component based winter NAO index on the y-axis. The bars show each winter's mean NAO index (where for instance "winter 1900" means the period from December 1899 up to and including March 1900). The black line is the 5-year running mean of the same index values (smoothed with a Gaussian filter).
  • Source: graph drawn by Hanno using data published on the web by J.W. Hurrell (Climate Analysis Section, National Center for Atmospheric Research, Boulder, Colorado, USA) as "Climate indices" [http://www.cgd.ucar.edu/cas/jhurrell/indices.html]
  • Licence: released into the public domain by the originator
Public domain I, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.

In case this is not legally possible:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.


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