Temporal and Spatial Variability of Black Sea Hydrodynamics and Chlorophyll: A Concentration with Connection to Wind Forcing
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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Spatial and temporal variability of the Black Sea surface circulation with the link to chlorophyll-a concentration and surface winds is investigated using Satellite data from Archiving, Validation, and Interpretation of Satellite Oceanographic data AVISO, Sea-viewing Wide Field-of-view Sensor SeaWiFS, and Quick Scatterometer QuikSCAT with the Self-Organizing Maps SOMs. Six spatial patterns with temporal variability were identified for the surface currents Pattern-1 Sevastopol Cyclonic and Batumi Dipole Eddies, 21, Pattern-2 Cyclonic RIM Current and Anti-cyclonic Batumi Eddy, 16, Pattern-3 Anti-cyclonic Sevastopol and Batumi Eddies, 17, Pattern-4 Cyclonic RIM Current and Cyclonic Batumi Eddy, 21, Pattern-5 Anti-cyclonic RIM Current and Batumi Dipole Eddies, 15, Pattern-6 Anti-cyclonic RIM Current and Multi Eddies, 10. It is found the change of the bi-modal characteristics in 2000-2009 with the fall bloom being more significant than the spring bloom. The surface circulation Pattern-4 cyclonic RIM current and Batumi eddy is associated with the occurrence of the fall bloom. Evident connection of negative NAO and negative ENSO to the Pattern-4 circulation implies the large-scale atmospheric effect. Possible connection of these patterns to the climatological indices, such as the North Atlantic Oscillation NAO and the East AtlanticWest Russian EAWR, oscillation are also discussed.
- Physical and Dynamic Oceanography