Winter
 (February 15) sigma-0 along
 33W
 to a depth of 500m. The thick
 line
 is the mixed layer base.
 
 The
 simulated fields are very similar
 in
 structure and are reasonably
 consistent
 with the observations.
 
 The
 smooth transition between the
 isopycnic
 coordinate interior and
 the
 nearsurface z-coordinate
 domain
 is evident.