A great deal of alongshore variability in the large meanders is observed in satellite measurements. Ikeda et al. We employ numerical simulations to understand their origin and influence.
Some vortices grow in size at the cost of others.
As a result, eddies of different sizes are observed. 8 shows that a pair of counter-rotating vortices pump upwelled high density fluid from the outer edge of the tank towards the center. The contours of relative vertical vorticity in Fig. As the fluid has different velocity than the local fluid, it moves relative to it, producing the fish hook. The bottom figure shows the mechanism of formation of the fish-hook structures.