Abstract
In March 2011 in the Abkhazian sector of Black Sea bloom of the coccolithophorid Emiliania huxleyi was recorded, the number of which exceeded 2x106 cells / liter. The goal of this paper was to identify hydrophysical conditions for the formation of bloom of this alga. For this purpose, hydrophysical parameters and their spatial distribution are studied at 15 stations of the water area located. It is shown that the vertical hydrological structure is typical for this time of year. Spatial variability of main hydrophysical parameters along the water surface was insignificant: temperature – 10.04 ± 0.39 оС, salinity – 17.8 ± 0.26 ‰, conditional density – 13.554 ± 0.231. It is shown that, in contrast to hydrological conditions during the period of typical bloom in Black Sea in June and during the period of March bloom seasonal thermocline is not sharply gradient. Coccolithophorid bloom in March developed with insolation at half the value of characteristic of summer bloom. The average velocity of the northwestern geostrophic current was about 25 cm/sec. The bloom develops both in the areas of anticyclonic vorticity and in the regions of cyclonic vorticity.
Published Version
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