Annual cycle of subsurface thermal structure in the tropical Atlantic Ocean

The subsurface thermal structure in the Tropical Atlantic Ocean (30 degree N-20 degree S, East of 80 degree W) is studied on the basis of an extensive data bank of subsurface soundings. Calendar monthly maps are presented showing mixed layer depth, base of thermocline, thermocline thickness, and vertical temperature gradient across the thermocline. These maps are complemented by vertical cross sections depicting mixed layer depth, base of thermocline, and selected isotherms: a zonal profile along the equator (50 degree W-10 degree E), a meridional transect across the eastern Atlantic (4 degree N-18 degree S), and a meridional section across the Central Atlantic (30 degree N-18 degree S).