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Fig. 5 | Climate Dynamics

Fig. 5

From: Influence of the Eurasian snow on the negative North Atlantic Oscillation in subseasonal forecasts of the cold winter 2009/2010

Fig. 5

Normalized NAO index based on SLP anomaly differences between 65°N and 35°N averaged over the 80°W–30°E longitudinal band. Indices are shown for Series 1 (blue crosses and circled cross for ensemble-mean), Series 2 (same in red), ERAINT (orange circles), and for the ensemble-mean VAREPS forecasts (green squares) and for the ensemble-mean operational (S3) forecasts (pink squares). Indices are for 15-day periods and plotted at the beginning of each period (e.g. December 1 corresponds to December 1–15). Symbols for the different forecast set are shifted by a day along the time axis for clarity of the display

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