Viktor Vyshnevskyi
Articles
Long-term changes in water level of the northwestern part of the Black Sea
Geographia Polonica (2024) vol. 97, iss. 4, pp. 473-484 | 
Full text
doi: https://doi.org/10.7163/GPol.0288
Abstract
The characteristics of sea water level (SWL) in the northwestern part of the Black Sea and the main influencing factors were studied. Based on observation data, it was found that the mean SWL at hydrological stations along the coast is similar. Over the past four decades, an increase in SWL has been observed, with an average rate of about 3.3 mm per year. This rise is comparable to the average increase observed in the World Ocean. Since about 2000, the increase in level has practically disappeared. It was shown that this feature is caused by the changes of the Black Sea water balance. The increase of air temperature in the studied region is greater than worldwide. This increase is observed alongside with the increase in water temperature and a significant increase in evaporation from the sea surface. The inflowing river runoff, which has been less than usualin recent years, also has an effect on SWL. In addition to long-term changes, seasonal fluctuations also occur. During a year, the smallest increase is observed in May and June, the largest – in November and February. The intra-annual distribution of water runoff from the Danube and Dnipro rivers is the primary factor that influences the seasonal changes of SWL.
Keywords: water level, northwestern part of the Black Sea, river runoff, air temperature
[vishnev.v@gmail.com], National Aviation University 1, Liubomyra Huzara Ave., 03058, Kyiv: Ukraine; Central Geophysical Observatory 39, building 2, Nauky Ave., 03028, Kyiv: Ukraine
, Research Institution – Ukrainian Scientific Centre of Ecology of the Sea 89, Franch Ave., 65009, Odesa: Ukraine
[vkomorin@gmail.com], Research Institution – Ukrainian Scientific Centre of Ecology of the Sea 89, Franch Ave., 65009, Odesa: Ukraine
Thermal regime of the Vistula River mouth and the Gdańsk Bay
Geographia Polonica (2023) vol. 96, iss. 4, pp. 459-471 | Full text
doi: https://doi.org/10.7163/GPol.0264
Abstract
Surface water temperature characteristics of the Vistula River mouth and the Gdańsk Bay were determined on the basis of available observations, remote sensing and hydrodynamic models. The water temperature in the Vistula River and the Gdańsk Bay was found to be much higher than the air temperature. In recent decades, the water temperature in the Vistula River mouth and the Gdańsk Bay has increased significantly. It hasbeen determined that water temperature in the bay is affected not only by air temperature, but also by water discharge of the Vistula River and wind
Keywords: water temperature, air temperature, remote sensing, coastal zone, the Baltic Sea
[rengraf@amu.edu.], Department of Hydrology and Water Management Adam Mickiewicz University Poznań, Bogumiła Krygowskiego 10 str., 61-680, Poznań: Poland
[vishnev.v@gmail.com], National Aviation University 1, Liubomyra Huzara Ave., 03058, Kyiv: Ukraine; Central Geophysical Observatory 39, building 2, Nauky Ave., 03028, Kyiv: Ukraine