Geoscience Reference
In-Depth Information
(a)
(b)
2
1
Figure 5.5.
Altimetric images of (a) westward and (b) eastward flow around a circular cylinder (at 3 o'clock). A perturbation in
the form of the vortex street in the lee of the cylinder is indicated by 1 while a stationary Rossby wave is indicated by 2.
(a)
(b)
2 cm/s
(c)
(d)
Figure 5.6.
Flows behind a cylinder towed in a rotating fluid. The direction of motion of the cylinder is indicated by the large
arrows: In (a) and (c) the cylinder is transported eastward while in (b) and (d) it is westward. Velocity vectors in (a) and (b) are
superposed on the altimetric images while (c) and (d) show relative vorticity for the same flows, respectively. Vorticity is normalized
by the Coriolis parameter and varies from -0.5 to 0.5. Cyclonic vortices are black while anticyclones are white in vorticity maps
(c) and (d). The control parameters for both flows are Re = 1730 and
R
β
= 0.6.
