Physical Oceanography, Vol. 16, No. 4, 2006
ANALYSIS OF OBSERVATIONS AND METHODS FOR CALCULATING
HYDROPHYSICAL FIELDS IN THE OCEAN
ESTIMATION OF THE LONG-TERM VARIABILITY OF HYDROPHYSICAL
CHARACTERISTICS OF THE BLACK SEA BASED ON THE ASSIMILATION
OF THE CLIMATIC HYDROLOGICAL FIELDS L AND ALTIMETRY DATA
V. L. Dorofeev, V. V. Knysh, and G. K. Korotaev
To study the long-term variability of the thermohaline and dynamic characteristics of the Black
Sea, we use three versions of climatic fields, namely, the fields reconstructed in the model ac-
cording to the old (1903–1982) and new (1903–2003) hydrological climatic data arrays of tem-
perature and salinity and according to the data of satellite altimetry. The analysis of the altimet-
ry-based climatic fields confirms the distinctions (established earlier according to the old and
new data arrays) in the seasonal variability of the integral characteristics of temperature and sali-
nity and in the structures of hydrophysical fields in the sea. It is shown that, in the winter–spring
season, the thermohaline fields reconstructed according to the new and altimetry data arrays are
characterized by a small elevation of the halocline (pycnocline) and the upper boundary of the
cold intermediate layer. In all seasons, the altimetry-based surface geostrophic currents contain
numerous mesoscale eddies with different signs of rotation. Moreover, in all seasons, the Rim
Current reconstructed according to the altimetry data is characterized by a narrower jet almost
along the entire its length. This jet is especially intense near the coasts of West Anatolia.
In recent years, the analysis of long-term variability of the thermohaline structure and dynamic characteris-
tics of waters in the Black Sea becomes more and more urgent. This is connected both with the observed global
changes in the climate of the atmosphere–ocean system and the necessity of analyzing the regional response to
In , one can find the comparison of the thermohaline and dynamic characteristics of the sea reconstructed
as a result of assimilation of two climatic arrays of temperature and salinity in the model, namely, of the old ar-
1903–1982) and the new array prepared by V.
2003)]. In the cited work, it is shown that the climatic arrays reconstructed according to the data of observations
for long but different time intervals contain valuable data concerning the character of many-year trends in the be-
havior of the thermohaline and dynamic characteristics of the sea. Moreover, the distinctions between the sea-
sonal courses of the integral characteristics of temperature, salinity, horizontal and vertical currents at different
depths, and the evolution of structures of the hydrophysical fields in the sea computed according to the data from
these two arrays are discovered and analyzed.
Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Sevastopol.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
3–17, July–August, 2006. Original article submitted March 15, 2005; re-
vision submitted April 15, 2005.
0928-5105/06/1604–0189 © 2006 Springer Science+Business Media, Inc. 189