In this and the seven subsequent slides, five annual cycles of upper ocean variability are illustrated by imaging the temperature field and superimposing the vertical coordinate interfaces and the mixed layer base (thick line). At the TRDW grid point, results are generally similar in the North Atlantic Trade Wind belt at the southern edge of the subtropical gyre. The KPP mixed layer tends to be thinner than in the two K-T mixing cases. Long- term climate drift is not observed.