|  | JUNE 2019
 
 FIGURE E13.
                   Northern Hemisphere:
                 500-hPa heights overlaid with standard deviation of high-pass filtered
                 height (top) and normalized anomalous variance of high-pass filtered
                 height (bottom). Heights are indicated by thick solid contours in both
                 panels (interval is 60 m). High-pass filtered fields reflect
                 fluctuations having periods less than 10 days, and are indicated by
                 thin contours and shading. 
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