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