Physical Oceanography, Vol. 19, No. 1, 2009
ANALYSIS OF OBSERVATIONS AND METHODS FOR CALCULATING
HYDROPHYSICAL FIELDS IN THE OCEAN
ANALYSIS OF THE BLACK-SEA CLIMATIC FIELDS BELOW THE MAIN
PYCNOCLINE OBTAINED ON THE BASIS OF ASSIMILATION OF THE
ARCHIVAL DATA ON TEMPERATURE AND SALINITY IN THE
NUMERICAL HYDRODYNAMIC MODEL
S. G. Demyshev, V. A. Ivanov, and N. V. Markova
We study model climatic temperature and salinity fields and the fields of currents in the 350–
m layer. The following specific features are revealed: Colder waters are observed in the
regions with anticyclonic vorticity. At the same time, warmer waters are detected in the regions
with cyclonic vorticity. This temperature effect can be explained by the elevation of temperature
with depth below the main pycnocline. In the region of the Sevastopol anticyclone, at depths
we observe a zone of cyclonic rotation of waters.
Near the Caucasian coast,
in the region of Gelendzhik, we reveal a narrow jet current existing at a depth of
March till July.
In view of the necessity of industrial utilization of the Black-Sea and coastal resources, it is necessary to
have information on the most probable hydrodynamic conditions in various parts of the sea. The application
solely of the archival data arrays of measurements without using three-dimensional dynamic models does not al-
low one to describe the continuous time-and-space evolution of the principal hydrophysical fields. Moreover,
the monthly average climatic temperature and salinity fields reconstructed solely on the basis of the archival data
do not reveal the mesoscale structure of these fields and their variability on these scales.
A procedure of reconstruction of the climatic hydrophysical fields in the Black Sea continuous both in time
and space is proposed in [1, 2]. It is based on the assimilation of the archival monthly average climatic tempera-
ture and salinity fields in the three-dimensional nonlinear model . A model climate of the Black Sea with high
horizontal space resolution
was obtained by using this model in  This enabled us to analyze vari-
ous large-scale and mesoscale specific features of climatic circulation in the upper active layer of the sea . In
the present work, we continue our investigation of the results of numerical experiments and perform the analysis
of the model climatic temperature field and the field of currents in the
Parameters of the Model
We now recall the main parameters used in the numerical experiment.
Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Sevastopol, Ukraine.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
1, pp.3–15, January–February, 2009. Original article submitted May 19, 2007;
revision submitted October 25, 2007.
0928-5105/09/1901–0001 © 2009 Springer Science+Business Media, Inc. 1