Giulivi, C.F. and Gordon, A.L., 2006.
Deep Sea Research Part I: Oceanographic Research Papers, 53: pp 1285-1300.

The transfer of upper kilometre water from the Indian Ocean into the South Atlantic, the Agulhas leakage, is believed accomplished primarily through mesoscale eddy processes. There have been various studies investigating eddies of the ‘Cape Basin Cauldron’ from specific datasets. The hydrographic data archive acquired during the last century within the Cape Basin region of the South Atlantic provides additional insight into the distribution and water-mass properties of the Cape Basin eddies.
For the present study we initially assembled a collection of 24,486 hydrographic stations for the period 1901–2002, and for the south-east Atlantic Ocean region within 10°W–21°E and 20°S–41°S. The recent hydrographic data are composed mostly of conductivity-temperature-depth (CTD) measurements, whereas the earlier historical data include bottle data. The data was obtained from the National Oceanographic Data Center and from the World Ocean Circulation Experiment Hydrographic Program Special Analysis Center.
Mesoscale activity and related isopycnal displacements associated with the Agulhas leakage in the Cape Basin region is intense. There are many publications that detail cruise-specific eddy structures for the region. While these studies may allow for a quantitative view of specific eddies, the intention of these cruises, the more random distribution of the archived data may expose more eddy population characteristics. The main objective of the authors was to determine what the archived hydrographic data could tell us about isopycnal depth variability in the Cape Basin. An additional objective was to determine the water-mass signatures of the thermocline and intermediate layers linked to significant isopycnal displacements, with the anticipation of identifying the source of the feature.