Winter
 (February 15) zonal current
 velocity
 along the Equator to a depth
 of
 500m. The thick line is the mixed
 layer
 base.
 
 These
 cross-sections illustrate the
 Zonal
 structure of the Equatorial
 Undercurrent
 and the westward
 flow
 above.
 
 HYCOM
 simulations performed
 using
 hybrid vertical coordinates
 produce
 a stronger undercurrent than
 HYCOM
 run in MICOM mode.