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      Hurrell North Atlantic Oscillation (NAO) Index (Station-Based)The winter (December thru March) station-based index of the NAO is based on the difference of normalized sea level pressure (SLP) between Lisbon, Portugal and...- dataset NetCDF
 
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      Hurrell North Atlantic Oscillation (NAO) Index (PC-Based)The principal component (PC)-based indices of the North Atlantic Oscillation (NAO) are the time series of the leading Empirical Orthogonal Function (EOF) of SLP anomalies over...- dataset NetCDF
 
 
                        