Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2017, Vol. 14, No. 3, pp. 237-245
Variability of the temperature field and temperature fronts in the northwest Black Sea inferred from satellite data
Yu.V. Artamonov
1 , R.V. Kolmak
1 , E.A. Skripaleva
1 , A.V. Fedirko
1 1 Marine Hydrophysical institute RAS, Sevastopol, Russia
Accepted: 03.04.2017
DOI: 10.21046/2070-7401-2017-14-3-237-245
The features of variability of sea surface temperature (SST) and temperature fronts in the northwest part of the Black Sea are investigated using the modern high spatial-temporal resolution SST satellite data. Separate branches of the Northwest frontal zone – the Coastal, Central and Southern ones – are revealed. Basic regularities of a climatic intraannual cycle of the fronts’ characteristics are defined. It is shown that the fronts are most clearly expressed in a winter season when the level of SST synoptic variability is minimal. In late spring, when the level of SST synoptic variability increases sharply, the fronts’ intensity weakens greatly. In summer, the frontal system almost completely vanishes. The tendency of time delay of the fronts’ intensity maximum in the southern direction is revealed to be 1-2 months. The Coastal branch is most intensive from November till January, the Central – in January and the Southern – in February–March. Qualitative relation between the fronts’ position and the bottom topography is analyzed. It is shown that each branch of the Northwest frontal zone is characterized by depths range over which it is located during the year. For the Coastal branch it is 10–20 m, for the Central – 20–40 m and for the Southern – 45–80 m.
Keywords: Black Sea, northwest shelf, satellite data, sea surface temperature, hydrological front, temperature gradient, seasonal variability, synoptic variability, bottom relief
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