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                  MARCH 2017
        
                                                                                     
                  FIGURE E8.
                    Northern Hemisphere mean and anomalous
                  sea level pressure (CDAS/Reanalysis). Mean values are denoted by solid
                  contours drawn at an interval of 4 hPa. Anomaly contour interval is
                  indicated by shading. 
                  Anomalies are calculated as departures from the
                  1981-2010 base period monthly means.
                   
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