Physical Oceanography, Vol. 17, No. 6, 2007
MODELING OF THE BREEZE CIRCULATION OF WATERS
IN THE KERCH STRAIT
Yu. N. Ryabtsev, I. V. Tereshchenko, and N. B. Shapiro
The problem of the numerical analysis of currents in the Kerch Strait is studied within the frame-
work of a linear nonstationary two-dimensional model in the nondivergent approximation. We
describe the actual situation when the motion is induced by a breeze against the background of
the daily average northeast wind. The breeze is specified as acting in a narrow coastal strip and
can be classified as a zonal wind. The variations of circulation near the Tuzla Island are studied
in detail. It is shown that the contribution of the breeze circulation to the total circulation can be
significant for the explanation of the processes running in the Kerch Strait.
The problem of modeling of the circulation of waters in the Kerch Strait is studied in numerous works
whose comprehensive survey is presented in . The present work can be regarded as a natural continuation of
the work  and is devoted to the investigation of currents caused by the action of nonstationary winds in the
Kerch Strait. In , the analysis of steady currents in the Kerch Strait is carried out by using the three-dimen-
sional stationary linear model of currents (Fel’zenbaum model) generalized to the case of internal friction pro-
portional to the current velocity. The assumption of stationarity used in the model restricts its applicability to the
description of the actual processes.
Statement of the Problem
Consider a nonstationary linear two-dimensional model obtained from the three-dimensional model under
the assumption that bottom friction is proportional to the current velocity averaged over the depth .
Currents in the strait are, generally speaking, caused by the action of winds blowing directly over the Kerch
Strait and the water exchange between the Sea of Azov and Black Sea. In the case where the motion of waters in
the strait and in both seas is stationary, the flow rate of water passing through the strait is determined by the river
discharge, precipitation, and evaporation in the seas. In the nonstationary case, the flow rate also depends on the
wind blowing over the strait. In , it is assumed that the motion of waters in the Kerch Strait is quasistationary
and the indicated flow rate depends on the wind stresses.
The equations of the two-dimensional nonstationary model are represented in the form
V = g
U = g
Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Sevastopol.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
16–27, November–December, 2007. Original article submitted May 12,
revision submitted May 31, 2006.
326 0928-5105/07/1706–0326 © 2007 Springer Science+Business Media, Inc.