The figures show parameters (Potential temperature, salinity, oxygen, silicate, nitrate, phosphate and depth of neutral surface) for 5 different surfaces (26.20, 27.22, 27.95, 28.05, 28.10).
For the printed version of the WOCE Atlantic Atlas maps in the postscript format have been converted into Adobe Illustrator files and manually edited in order to remove the graphic software artifacts and to include labels. The file conversion and editing was done by Jacqueline Sommerfeld from the Alfred Wegener Institute, Bremerhaven. You can download these ai files.
Also visit the WOCE Atlantic Atlas Maps for Levels.