FIGURE T22. Mean (top) and anomalous
(bottom) 200-hPa stream function (CDAS/Reanalysis). Contour interval is
10 x 106 m2s-1
(top) and 5 x 106
(bottom). Negative (positive) values are indicated by dashed (solid)
lines and the zero line is indicated by the heavy solid line. The
non-divergent component of the flow is directed along the contours with
speed proportional to the gradient. Thus, high (low) stream function
corresponds to high (low) geopotential height in the Northern Hemisphere
and to low (high) geopotential height in the Southern Hemisphere.
Anomalies are departures from the 1981-2010 base period monthly means.