Winter
 (February 15) T along
 65W
 to a depth of 500m. The thick
 line
 is the mixed layer base.
 
 These
 cross-sections illustrate the
 subtropical
 mode water (STMW).
 Reasons
 why the STMW is too
 cold
 when isopycnic coordinates
 are
 used need to be determined.
 Note
 that the winter mixed layer
 is
 deeper in the STMW formation
 region
 for the HYCOM
 MICOM-mode
 simulation, and the
 mixed
 layer water is colder.
 performance
 of the MICOM K-T
 mixed
 layer model is probably
 largely
 responsible for the cold
 STMW.