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APRIL 2012

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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