A.B. Polonsky, E.A. Grebneva
Institute of Natural and Technical Systems, RF, Sevastopol, Lenin St., 28
Based on the massive of archival data of the Institute of Natural and Technical Systems for the period from 1960 to 2000, large-scale structures of the pH field and the seasonal variation in the water area of the estuary near the river Danube are described. Spatially heterogeneous pH values of the study water area are determined by biological processes in the mixing zone of river and sea waters while in the immediate vicinity of the delta of the river Danube they are due to characteristics of the river water. The range of climatic pH values varies between 8.42-8.47 with an average of 8.46 units in the field pH. The maximum values (8.45–8.47 pH units) are concentrated in the region of transformation and mixing of river and sea waters. Near the delta of the river Danube (in the area of river water prevalence) lower values of 8.42-8.44 pH units are located. The seasonal dynamics of pH is largely determined by the seasonal cycle in the development of bio-production processes that depend on temperature conditions and vertical stratification, which are significantly affected by the volume of the river water flow. From winter to summer, a gradual increase in values begins, and then their decrease towards autumn. The range of the averaged seasonal variability of the pH value is 0.22 units. The correlation function characterizing the impact of costs of the Danube on pH, reaches its maximum during a time shift (delayed pH) for two months.
Keywords: pH, Black Sea, seasonal course, pH field, the estuary of the Danube.
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[IEEE] A. B. Polonsky and E. A. Grebneva, “Climatic characteristics of a ph in the waters near Danube river and its seasonal variability,” Monitoring systems of environment, no. 1, pp. 109–116, Mar. 2020.
LIST OF REFERENCES
- State of the Environment of the Black Sea (2001 – 2006/7) [Text] // Edited by Temel Oguz. Publications of the Commission on the Protection of the Black Sea Against Pollution 2008-3 (BSC). Istanbul: 2008. 448 p.
- Northwest Black Sea: biology and ecology / under the editorship. Y.P. Zaitseva B.G. Alexandrova, G.G. Minicheva. Kiev: Scientific Thought, 2006. 701 p.
- Marine ecosystem of Ukraine’s Danube Delta / Executive editor. L.V. Vorobyova. Odessa: Astroprint, 1998. 332 p.
- Zaitsev Yu.P., Garkavaya G.P., Nesterova D.A., Polishchuk L.N. Danube – the main source eutrophication of Black Sea // hydrobiological journal 1989. Vol. 25, i. 4. Р. 21–23.
- Zaitsev Yu.P., Garkavaya G.P., Nesterova D.A., Polishchuk L.N., Tsokur A.G. The current state of the Black Sea ecosystem // The current state of the Black Sea. M.: Science. 1987. Р. 216–230.
- Yunev O.A., Carstensen J., Moncheva S. [et al.]. Nutrient and phytoplankton trends on the western Black Sea shelf in response to cultural eutrophication and climate changes // Estuar. Coas. Shelf Sci. 2007. 74. Р. 63–76.
- Kondratiev S.I. Features of the spatial distribution of oxygen in the waters of the estuary of the Danube in 1997 – 2010 // Marine hydrophysical journal.2014. no. 3. Р. 60–76.
- Osadchaya N.N., Klebanov D.A. Assessment of nutrient removal from the Danube catchment area in the modern period (1989–2012) the main factors of its formation and regulation // Scientific works Ukrain DGNMI. 2016. i.. 268. Р. 58–66.
- Mikhailov V.N., Mikhailova M.V. River Mouths // The Handbook of Envi-ronmenta Chemistry. Berlin Heidelberg. Springer-Verlag. 2008. Vol. 5. Part Q. Р. 91–133.
- Mikhailov V.N., Morozov V.N., Mikhailova M.V., Granich P.S. Gidrologicheskiye protsessy v ust’yevoy oblasti Dunaya i ikh vozmozhnyye izmeneniya Hydrological processes in the estuary of the Danube and their possible changes // Water resources. 1988. No. 1. Р. 24–32.
- Chistyakov A.A. Makarova N.V., Makarov V.I. Quaternary geology: a textbook. Moscow: GEOS. 2000. 330 p.
- Melnikov V.V., Polonsky A.B., Kotolupova A.A. [et al.]. GIS of Institute Natural Systems //Environmental Control Systems. 2016. i 4 (24). Р. 49–55.
- Novikova A.M., Kotolupova A.A. On the experience of using the kriging method in Surfer and QGIS programs for marine climate research // Environmental Control Systems. 2016. №. 6 (26). Р. 59–67.
- Berlin N.A., Money Yu.M., Popov Yu.I. [et al.]. On the issue of transboundary impact in the estuary of the Danube // Bulletin of the Odessa university. 2010. Т. 15. i. 10. Р. 93–103. (in Russian)
- Polonsky A.B., Grebneva E.A. Climatic pH distribution in the deep part of the Black Sea // Environmental Control Systems. 2017. i. 10 (30). Р. 88–95.
- Water Quality in the Danube River Basin 2006: TNMN Yearbook-2006. ICPDR, 2009. 40 р.
- Makkaveev P.N., Polukhin A.A., Stepanova S.V. Work on the study of the estuarine areas of small and medium rivers in the coastal zone of the Russian sector of the Black Sea // Environmental safety of coastal and shelf zones and integrated use of shelf resources, 2013. i 27. Р. 412–417.
- Nesterova D.A. Development of nepudmeu Exuviella cordata and the phenomenon of “red tide” in the northwestern part of the Black Sea // Biology of the sea. 1979. i. 5. Р. 24–29.
- Kirilenko N.F., Evstigneev V.P. Variability of Chlorophyll-A content in the northwestern part of the Black Sea in modern climatic conditions // Environmental Control Systems. 2017. I. 10 (30). Р. 80–87.
- Bogatova Yu.I. Hydrochemical regime of the Ukrainian Danube coastal section // Water resources. 2013. vol. 40, i. 3. Р. 295–305.
- Gazetov E.I., Medinets V.I. Investigation of the variability of the main physicochemical characteristics of sea waters near the Snake Island in 2004-2013 // Bulletin of ONU. Ser.: Geographical and geological sciences 2016. vol. 21, i. 2. Р. 24–45.
- Polonsky A.B., Grebneva E.A. Spatio-temporal variability of the hydrogen indicator of the Black Sea waters // Academy of Science Reports, 2019, vol. 486, i. 4. Р. 90–95.
- Kirilenko N.F., Kushnir V.M., Lemeshko E.M. The influence of river runoff on the environmental conditions of the northwestern region of the Black Sea region according to contact and remote measurement // Geoinformatics. 2009. № 4. Р. 1–7.
- McQuatters-Gollop A., Mee L.D. Raitsos D.E., Shapiro G.I. Non-linearities, regime shifts and recovery: The recent influence of climate on Black Sea chlorophyll // J. Mar. Sys. 2008. Vol. 74. P. 649–658.
- Kosarev A.N., Arkhipkin V.S., Katysheva M.V. Hydrological structure of the waters of the northwestern part of the Black Sea // Bulletin of Moscow University. 2001. Р. 50–55.