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500 hPa Height, 700-300 hPa Thickness, and Term B QG Height Tendency Equation

Caption:
+500 hPa geopotential height (solid contours every 6 dam).
+700-300 hPa thickness (dashed contours every 6 dam).
+Term B of the QG Height Tendency equation evaluated over the 700-300 hPa layer [shaded according to the colorbar (10^-13 s^-3)]. Warm (cold) colors denote regions of forcing for 500 hPa geopotential height falls (rises).
+Image was generated from 1.0x1.0^o NCEP-GFS data smoothed by a Gaussian filter with a weight of 25.