Etudes et évaluation de processus océaniques par des hiérarchies ...

4.5. MEAN CIRCULATION AND STRUCTURES OF TILTED OCEAN DEEP CONVECTION115
814 J O U R N A L O F P H Y S I C A L O C E A N O G R A P H Y VOLUME 38
tel-00545911, version 1 - 13 Dec 2010
FIG. 7. Mean velocities (top left) u h,t and (top right) h,t , and correlations (bottom left) uw h,t and (bottom
right) w h, t (see Table 2 for experiments).
cases, but the difference never exceeds 5%. The situation
is different for the horizontal components shown in
Fig. 10. The values u rms u 2 h,t and rms u 2 h,t are
typically 20%–25% higher outside the top and bottom
boundary layers.
The correlation wT h,t is responsible for the downward
heat transport; the stationarity of the dynamics
thus forces it to be a linear function of the distance
above the ocean floor, with a gradient imposed by the
surface heat flux divided by the total depth. There is
thus no possible dependence on rotation, direction, and
magnitude.
The correlation TT h,t (not shown), where T is the
local temperature deviation from the horizontal mean,
FIG. 8. Left- and right-hand sides of (left) Eq. (15) and (right) Eq. (16) The more wavy curves are
the right-hand sides of the equations (see Table 2 for experiments).