Fig 12. Potential vorticity anomaly (PVA) (s^-1) cross-section of the dipole formed south of St. Croix during model month August 2008, on days 8 (a) and 9 (b).

The PVA sections are overlaid with zonal velocity contours. Yellow-brown PVA shows the cyclone and blue-purple PVA shows the anticyclone.