Physical Oceanography, Vol.
4, November, 2011 (Ukrainian Original No.
4, July–August, 2011)
GENERATION OF WAVES IN A BOUNDED BASIN BY A TRAVELING FRONT OF
ATMOSPHERIC PRESSURE AND THE FIELD OF WIND STRESSES INDUCED
BY THIS FRONT
S. F. Dotsenko
and N. A. Miklashevskaya
A plane problem of generation of barotropic seiches in a bounded rotating basin by traveling atmos-
pheric fronts is studied within the framework of the linear theory of long waves. The front is character-
ized by disturbances of the baric field and the corresponding field of tangential wind stresses. We de-
duce the modified Ackerblom formulas for the wind stresses according to the given anomalies of atmos-
pheric pressure in which the uniform transport of disturbances of the baric field is taken into account.
We perform the numerical analyses of the dependences of the amplitudes of oscillations of fluid in the
basin on the parameters of the atmospheric front and the choice of the formulas for the tangential wind
stresses. The influence of the wind stresses leads to significant quantitative and qualitative changes in
the oscillations of fluid in the basin as compared with the case of pure baric action.
Keywords: barotropic seiches, generation, traveling atmospheric front, contribution of the wind stresses,
equations of long waves, numerical solutions.
The dynamic processes in the atmosphere serve as one of the sources of energy for the space-and-time
variations of the hydrophysical fields in the World Ocean . The transfer of energy from the atmosphere into
the ocean is realized as a result of the action of inhomogeneous fields of the atmospheric pressure and tangential
wind stresses upon the ocean surface and due to the presence of buoyancy flows through the atmosphere–ocean
boundary. As a rule, the contribution of the last factor to the variations of the World Ocean is small. On the
synoptic scales of motion, the predominant contribution to the transfer of energy from the atmosphere into the
ocean is made by the wind stresses . The analysis of the in-situ data and numerical modeling reveals a sig-
nificant contribution of changes in the baric field to the generation of nontidal oscillations of the sea level with
periods from tens of hours to tens of days on space scales of 200–1000 km [3, 4]. For the individual traveling
atmospheric formations (fronts and eddies), the relative contribution of the wind stresses to the response of the
ocean to atmospheric actions is studied quite poorly.
For atmospheric anomalies traveling over closed and semiclosed basins, we observe the excitation of
oscillations that can be regarded as the superpositions of seiches. This was confirmed by the data of obser-
vations [5–8] and the results of numerical modeling, in particular, for the Black Sea and Sea of Azov [9, 10].
The general physical regularities of the process of generation of seiches in closed basins of variable depth by
traveling fronts with regard for the joint action of disturbances of the baric field and the field of wind stresses on
the sea surface require additional investigations.
Marine Hydrophysical Institute, Ukrainian National Academy of Sciences, Sevastopol, Ukraine; e-mail: firstname.lastname@example.org.
Marine Hydrophysical Institute, Ukrainian National Academy of Sciences, Sevastopol, Ukraine; e-mail: email@example.com.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
13–27, July–August, 2011. Original article submitted March 18, 2010.
230 0928–5105/11/2104–0230 © 2011 Springer Science+Business Media, Inc.