статья в журнале

En

Oceanology

ISSN:00014370
eSSN:1531-8508

2022

Finenko, Z.Z.¹

Mansurova, I.M.¹

10.1134/S0001437022030043

Abstract—: The study assesses dynamics of phytoplankton biomass in the surface layer, the depth of the upper mixed layer, and the photic zone based on satellite data in the deep sea and coastal regions of the Black Sea for 1998–2015. The annual biomass dynamics had the same character in all regions and was described by a U-shaped curve with some deviation in the spring. Average seasonal values were at the maximum in winter and minimum in summer, differing by 2–2.5-fold. Phytoplankton blooms with an average duration 1–2.5 months were present in all seasons, but with different frequencies. The highest numbers were recorded in spring, minimal numbers in summer and fall; during the bloom, biomass was twice as much as the background values. Phytoplankton biomass grew with decrease in water temperature and increase in mixed layer depth during fall. There was no such dependence during the other seasons. The dynamics of the annual average biomass showed negative trend in the deep sea from 1998 to 2015, the latter was not observed in the coastal zone. The strongest decrease in biomass was recorded in spring and summer; it was not observed in winter and fall. © 2022, Pleiades Publishing, Inc

phytoplankton, Black Sea, chlorophyll a concentration, phytoplankton biomass, satellite data

2022-08-03 15:00:44