статья в журнале

En

Physical Oceanography

ISSN:0928-5105
eSSN:1573-160X

2018

10.22449/1573-160X-2018-4-251-261

Retrospective analysis of the Black Sea hydrophysical fields (1993-2014) is carried out including assimilation of the three-dimensional fields of the temperature and salinity pseudo measurements reconstructed before in the model on the horizons within the layer 63-500 m by the adaptive statistics method. To compare root-mean-square deviations of the temperature and salinity fields from the observations, the reanalysis data (1993-2012) comprising assimilation of the temperature and salinity unperturbed profiles in the model are used. Variability of temperature and salinity (density) profiles in the main pycnocline is reproduced more accurately in the reanalysis for 1993-2014. Root-meansquare deviations of the sea level fields (resulted from the reanalysis for 1993-2014) from the altimetry ones in the first decade of seasonal and inter-annual variability are smaller than those (estimated in the same way) obtained from the reanalysis data for 1992-2015 in which the AVISO data and the sea surface temperature are assimilated. The root-mean-square deviations of the sea level increase in the second decade of the period. It is explained by the fact that decrease of the training set is accompanied by lowering of accuracy in reconstructing the fields of the temperature and salinity pseudo-measurements based on the altimetry and Argo buoys' data. Synoptic variability of the sea currents' fields in 1993-2014 is studied by analyzing the maps of the sea level integral dispersion. The values of sea level dispersion are found to be high on vast areas in the western and eastern parts of the basin. It is conditioned by generation and movement of the Sevastopol anticyclone, formation of synoptic vortices in the southwestern region of the western cyclonic water cycle, dynamics and evolution of the Caucasian anticyclonic vortices and the Batumi anticyclone. The local area to the northwest off Sinop is also noted.

DATA ASSIMILATION, NUMERICAL-MODEL, TEMPERATURE, CIRCULATION, DYNAMICS, FIELDS

2018-12-12 15:49:00