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    KPP
    Procedure (part 2) 
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    Calculate
    surface boundary layer k profiles for T, S, and momentum 
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    Vertical
    diffusivity for T is parameterized as 
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    where        is the nonlocal transport term 
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    Diffusivity
    is parameterized as 
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    where
    w is a turbulent velocity scale that is a function of the 
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    stability
    of the forcing, G is a 3rd order polynomial shape 
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    function,
    and sigma is a scale depth varying from 0 to 1 over the 
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    depth
    range H 
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    Choose
    coefficients of G to match the interior and boundary layer K 
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    profiles,
    producing a final K profile with a continuous first vertical 
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    derivative 
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    Solve
    diffusion equation semi-implicitly with two temporal iterations 
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    Diagnose
    mixed layer thickness along with T, S, u, and v 
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