This is the mixed layer thickness calculated diagnostically inside HYCOM, keying on tmljmp from blkdat.input:
0.3 'tmljmp' = equivalent temperature jump across mixed-layer (degC)
The
mld is at the distance from the surface of the density jump equivalent to tmljmp. The calculation is done in density so
that it works when salinity is important. In many places this is about the
same as a 0.3 degC temperature jump MLD criteria.
Note that surface_boundary_layer_thickness is the BLD from KPP.
Alan.