Geoscience Reference
In-Depth Information
(a)
(b)
(c)
(d)
Figure 6.14.
Pressure and velocity fields of (a) upper and lower (b) layers and (c) interface height of the baroclinically unstable
mode at
k
=9(
kR
d
= 14.5, see Figure 6.13). Full lines: positive; dotted lines: negative values. The field in the upper layer is typical
for a frontal mode, while the field in the lower layer is typical for a Rossby mode. (d) Photograph of the corresponding experiment
adapted from
Griffiths and Linden
[1982].
(a)
(b)
5
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
4
3
H
H
0
2
0.04
RF
1
0.02
0
16
0
0
17
18
19
20
5
10
15
k
20
25
r
R
d
Figure 6.15.
(a) Initial experimental state (dashed line) and basic state height after reaching cyclo-geostrophic equilibrium (thick
line) for
F
0
= 14.4 and
δ
0
= 0.19. (b) Dispersion diagram (upper panel) and growth rate (lower panel) of the eigenmodes. Thick
gray lines in the upper panel correspond to the RF and RP resonances and respective unstable modes.
