Volumetric
 T-S censuses for summer
 (Aug.
 15). The images show the
 base-10
 logarithm of water volume
 in
 cubic meters. Superimposed are
 contours
 of sigma-0 calculated
 using
 the HYCOM/MICOM
 equation
 of state.
 
 HYCOM
 was run with KPP mixing
 and
 relaxation boundary conditions
 to
 produce the “best” possible
 simulation.
 
 Relaxation
 boundary conditions
 caused
 the simulated census to
 more-closely
 resemble the observed
 census.
 The BC’s act to “form”
 water
 masses that are actually
 formed
 outside of the model
 domain,
 bringing the simulated
 census
 closer to reality.