Currents of the Azov Sea Based on Measurements and Spectral Analysis

The work describes three states of water circulation in the Azov Sea based on previously conducted studies and unpublished previously results of studies in 2023–2024. Pronounced diurnal radiation tides are typical for warm, windless times of the year, when breeze winds develop. Seiche currents are often mixed with tidal currents, so it is difficult to observe the tidal structure in its pure form using current measurements. With fluctuations in wind parameters, the seiches of the Sea of Azov change rapidly both depending on the observation area and on the mode structure according to the cascade of scales. The strongest positive and negative water setups are inextricably linked with the single-node mode, the currents of which are able to change the shapes of coastal accumulative bodies, such as beaches and spits, in one cycle. The features of such a system of currents are still unclear. The third state is transitional, which is observed when the wind increases.

Don delta, shallowing, climate cyclicity, positive and negative water setup phenomena, spectral analysis, seiches