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Springer Geology

ISSN:21979545

2023

10.1007/978-981-99-6575-5_6

LAKRIU

The purpose of this work is to study the behavior of the Black Sea deep-water currents below the permanent pycnocline under regular (climatic) and anomalous atmospheric forcing. The annual variability of Black Sea current fields at hori-zons deeper than 300 m and the response of deep-water currents to the atmospheric anomalous quasitropical cyclone in September 2005 in the southwestern Black Sea are analyzed. Thus, the variability of deep-water currents is assessed both when the climatic fluxes of heat, moisture and wind at the sea surface change quite smoothly throughout the year and when the circulation is forced by an extreme atmospheric cyclone during its 5-day passage over the sea surface and one month after the cyclone leaves the sea basin. It is shown that the velocities of Black Sea currents during anomalous cyclone forcing can increase several times compared to their typical values, and the relaxation of the current field after the quasitropical cyclone crosses the sea edge can take up to 4–5 weeks in the deep sea layer. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.

Anomalous cyclone, Black Sea, Climatic currents, Deep-water circulation, Numerical experiment, Relaxation, Simulation, Undercurrents

2024-02-05 15:47:04