Cross-sections
 of sigma-0 along
 33W
 to a depth of 500m for summer
 (top)
 and to 3000m for winter
 (bottom).
 The thick line is the mixed
 layer
 base.
 
 HYCOM
 was run with KPP mixing
 and
 relaxation boundary conditions
 to
 produce the “best” possible
 simulation.
 
 Nearsurface
 fields are qualitatively
 similar,
 although differences in
 detail
 exist.
 
 At
 middle depths, water with lower
 density
 penetrates deeper in
 in
 the simulated fields than in
 observations.