Physical Oceanography, Vol.
3, September, 2011 (Ukrainian Original No.
3, May–June, 2011)
ANALYSIS OF OBSERVATIONS AND METHODS FOR CALCULATING
HYDROPHYSICAL FIELDS IN THE OCEAN
CLIMATIC STRUCTURE OF THE WIND FIELDS IN THE BLACK-SEA REGION
V. V. E f i m o v,
A. E. Anisimov,
and V. S. Barabanov
For the Black-Sea region, we perform the dynamic reanalysis of the data on atmospheric circulation for
the period 1958–2001 by using the HadRM3P model with a space resolution of 25 km. We estimate the
mean climatic atmospheric fields of vorticity and divergence of the wind velocity and study their space
structure and seasonal variability. The climatic estimates of the annual course of vorticity of the wind
velocity over the sea are presented. The obtained large annual average values of vorticity of the velocity
reveal the predominant role played by the wind action in the generation not only of the seasonal variabil-
ity but also of the mean cyclonic circulation of waters in the Black Sea.
Keywords: climate, Black Sea, reanalysis, modeling of the climate.
The data on the surface wind fields in the Black-Sea region are of significant interest for the solution of nu-
merous scientific and applied problems connected both with the design and construction of engineering struc-
tures, e.g., wind-driven power plants and gas-and-oil extracting sea platforms, and with the evaluation of the de-
gree of pollution of the coastal cities. The numerical analyses of the wind-induced waves and currents in the sea
and monitoring of the ecological situation also require the data on the surface winds. Note that the diagnostics
and short-term forecasts of current weather are now fairly well realized by using the contemporary numerical
methods of weather forecasting. At the same time, the climatic fields of the velocities averaged over sufficiently
large periods of time (~30 yr) are studied quite poorly. The most complete data on these climatic fields can be
obtained from the available databases of retrospective analysis (NCEP/NCAR, ERA–40, etc.) [1, 2]. However,
the space resolution of the available data of global atmospheric reanalysis (~125 km) is insufficient for the in-
vestigation of the regional specific features with regard for the complex orography and other inhomogeneities of
the underlying surface. In addition, the application of course space resolution for the numerical reanalysis in the
regions with complex surface topography may introduce significant distortions in the quantitative characteristics
of the atmospheric circulation. Therefore, it is necessary to use the data with higher space resolution on the pa-
rameters of atmospheric circulation obtained as a result of the retrospective analysis performed by using the nu-
merical model of regional atmospheric circulation and the input data on the basis of the ERA-40 database of
global reanalysis for the period 1958–2001.
Marine Hydrophysical Institute, Ukrainian National Academy of Sciences, Sevastopol, Ukraine.
Corresponding author: email@example.com.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
3–13, May–June, 2011. Original article submitted January 25, 2010; revi-
sion submitted March 15, 2010.
0928–5105/11/2103–0153 © 2011 Springer Science+Business Media, Inc. 153