42.0
28.0
14.0
0 . 0
464
.5
a
18.0
36 . 0
54.0
Figure 6c: Vertical velocity (10 - 4 m/s) obtained by the SG omega equation
(from Pinot et aI., 1995).
c - Models
72 .0
Numerical studies are useful to clarify our understanding of frontogene tic processes,
and ageostrophic dynamics. Realistic simulations of the mesoscale circulation in the
CTZ indicate that strong downwelling (40 m / day) can take place at the edge of narrow
filaments (Haidvogel et aI. , 1991). The results of high resolution modelling of frontogenesis
(Wang, 1993) show that vertical velocities up to 100 m/ day can be expected at Rossby
deformation radius scale meanders due to frontal baroclinic instability. Vilidez et al.
(1994b) used a data assimilation technique with a primitive equation model to obtain
consistent three-dimensional ageostrophic velocity fields in t he Alboran Sea. Models also