Revision of Vortex Average

Index

Draw a circle around min[z(10hPa)]

Calculate [dz/dx+dz/dy], find max at each longitude

Gradient of Z, no smoothing, split vortex

Gradient of Z, with smoothing, split vortex

Gradient of Z, no smoothing, displ. vortex

Gradient of Z, with smoothing, displ. vortex

X_t circle around Z min

X_t gradient of Z

v'T' gradient of Z