A. G. Zatsepin, V. L. Didkovski, and A. V. Semenov
Shirshov Institute of Oceanology (IO), Russian Academy of Sciences, Nakhimovskii pr. 23, Moscow, 117218 Russia
Received September 4, 1995
Abstract—A new self-oscillatory mechanism of inducing a periodic vortex structure by a local stationary mass
source and potential vorticity over a sloping bottom in a rotating fluid is demonstrated and studied under labo-
ratory conditions. It is shown that the mechanism may be responsible for dividing a near-bottom density flow
into a chain of vortex lenses. Two regimes of the density flow are experimentally found over the sloping bottom
in a rotating fluid: geostrophic and wave–vortex regimes. The results obtained are used to evaluate a possibility
of forming eddy lenses in the Mediterranean water due to the self-oscillatory mechanism immediately over the
ocean slope of the Iberian Peninsula in the Atlantic Ocean.
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