Figure 2b) Altimeter-derived tracks of the three rings identified in the Benguela Current Experiment. These tracks reveal that the three rings were shed at the Retroflection Region in February 1997, July 1996 and March 1996. Their locations during the experiment are shown with solid circles, and during November 1997 with solid squares. The distance between white solid circles represents the approximate distance each ring traveled during a month. Several parameters derived from hydrographic and altimeter data, such as translation speed, upper layer thickness, available potential energy and heat content are included in the figure.
For more information on the altimetry techniques used in the Benguela Current Experiment, see the Dynamics of the South East Atlantic Ocean project.