Особливості формування гідрологічних характеристик прибережної зони Дельти Дунаю під впливом проходження атмосферного циклону
Альтернативна назва
Features of the hydrological characteristics formation of the Danube Delta coastal zone under the influence of the atmospheric cyclone passage
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Дата
2025
Науковий керівник
Укладач
Редактор
Назва журналу
ISSN
2303-9914
E-ISSN
2415-315X
Назва тому
Видавець
Одеський національний університет імені І. І. Мечникова
Анотація
У статті розглянута зміна швидкості та напрямку течії, температури та солоності води на поверхні, а також висоти морської поверхні відносно геоїду у прибережній зоні Дельти Дунаю, яка відбувалася на тлі проходження атмосферного циклону через північно-західну частину Чорного моря.
Problem Statement and Purpose. The natural delta is in a state of constant change. Today, the natural cycles of change and regeneration of the Danube River Delta have been limited by human activities such as damming the river for navigation and flood control, which laid the foundation for today’s ecological collapse and coastal erosion. Restoring a healthy, productive Danube Delta requires a variety of restoration solutions, including reconnecting the river to its delta through land management, restoring and supporting wetlands and barrier islands, implementing nature-based solutions in managing the Danube River, as well as taking measures to increase public resilience. The aim of the study is to determine quantitative indicators of changes in the hydrological characteristics of the Danube Delta coastal waters under the influence of the passage of an atmospheric cyclone in current climatic conditions. Data and Methods. The analysis of hydrological characteristics was performed on the basis of daily data and monthly average multi-year data on current velocity, sea surface temperature and sea surface salinity, and sea surface height above geoid from the Global Ocean Physics Reanalysis product of the Copernicus Marine Service dataset. To analyze the development of synoptic processes, surface analysis maps for the period 04–10.02.2020 at 00 UTC and the results of observations at the Vylkove weather station were used. Results. The passage of the cyclone over the Danube Delta region was accompanied by the occurrence of short-period fluctuations in sea level and water level in the Danube River, as well as in hydrological parameters in the coastal waters of the delta. The formation of a current in the direction of the southwestern quarter with an increase in speed caused the flow of more saline waters into the coastal zone. After the passage of the cyclone and the establishment of a low-gradient field of high pressure, there was a decrease in the current speed and sea level in the coastal zone, as well as a decrease in the SST and water salinity, which indicates an increase in the influence of the Danube runoff in the formation of hydrological characteristics of the waters of the coastal waters on these days. The decrease in the frequency of cyclones in the northwestern Black Sea region, which is predicted for the second half of the 21st century, will lead to a change in the distribution of the frequency of wind speeds and, as a result, the circulation of waters in the coastal waters.
Problem Statement and Purpose. The natural delta is in a state of constant change. Today, the natural cycles of change and regeneration of the Danube River Delta have been limited by human activities such as damming the river for navigation and flood control, which laid the foundation for today’s ecological collapse and coastal erosion. Restoring a healthy, productive Danube Delta requires a variety of restoration solutions, including reconnecting the river to its delta through land management, restoring and supporting wetlands and barrier islands, implementing nature-based solutions in managing the Danube River, as well as taking measures to increase public resilience. The aim of the study is to determine quantitative indicators of changes in the hydrological characteristics of the Danube Delta coastal waters under the influence of the passage of an atmospheric cyclone in current climatic conditions. Data and Methods. The analysis of hydrological characteristics was performed on the basis of daily data and monthly average multi-year data on current velocity, sea surface temperature and sea surface salinity, and sea surface height above geoid from the Global Ocean Physics Reanalysis product of the Copernicus Marine Service dataset. To analyze the development of synoptic processes, surface analysis maps for the period 04–10.02.2020 at 00 UTC and the results of observations at the Vylkove weather station were used. Results. The passage of the cyclone over the Danube Delta region was accompanied by the occurrence of short-period fluctuations in sea level and water level in the Danube River, as well as in hydrological parameters in the coastal waters of the delta. The formation of a current in the direction of the southwestern quarter with an increase in speed caused the flow of more saline waters into the coastal zone. After the passage of the cyclone and the establishment of a low-gradient field of high pressure, there was a decrease in the current speed and sea level in the coastal zone, as well as a decrease in the SST and water salinity, which indicates an increase in the influence of the Danube runoff in the formation of hydrological characteristics of the waters of the coastal waters on these days. The decrease in the frequency of cyclones in the northwestern Black Sea region, which is predicted for the second half of the 21st century, will lead to a change in the distribution of the frequency of wind speeds and, as a result, the circulation of waters in the coastal waters.
Опис
Ключові слова
авандельта Дунаю, взаємодія океану та атмосфери, рівень моря, температура, солоність, Danube Delta, ocean-atmosphere interaction, sea level, temperature, salinity
Бібліографічний опис
Особливості формування гідрологічних характеристик прибережної зони Дельти Дунаю під впливом проходження атмосферного циклону / Ю. Ель Хадрі, М. А. Берлінський, М. О. Сліже, О. В. Дерик, К. А. Головченко. Вісник Одеського національного університету. Географічні та геологічні науки. 2025. Т. 30, вип. 2(47). С. 13–26.
УДК
551.465.7