Physical Oceanography

, 19:140

Climatic and hydrophysical conditions of the development of hypoxia in waters of the northwest shelf of the Black Sea

  • V. V. Ukrainskii
  • Yu. I. Popov
Analysis of Observations and Methods for Calculating Hydrophysical Fields in the Ocean

The data of meteorological and oceanographic observations on the northwest shelf of the Black Sea for 1973–2000 are used to compute the characteristics of the entire area in the presence of hypoxia of waters under the pycnocline in the summer–autumn period and the area of surface waters with a level of salinity lower than 17.5‰ in May. The time of onset of the spring warming of air (stable transition through a temperature of 5°) is determined. A statistically significant positive trend of the air temperature (0.8° per 100 yr) is revealed in Odessa. The process of warming was observed mainly for the winter (1.5° per 100 yr) and spring (0.8° per 100 yr) periods and became especially intense since the beginning of the 1990s. On the basis of the data of correlation analyses, we establish a statistically significant relationship between the large-scale atmospheric processes [the index of North Atlantic Oscillation (NAO) and the wind conditions], the area of surface waters whose salinity is lower than 17.5‰, and the total area with hypoxia in the summer–autumn periods. For positive mean values of the NAO index (in January–March), we most often observe early spring with elevated repetition of the south and west winds with subsequent development of hypoxia in large areas of the northwest shelf. We propose an empirical regression model for the prediction of the total area of summer–autumn hypoxia of waters with predictors: the onset of the spring warming of air and the area of propagation of waters whose salinity is lower than 17.5‰ in May. The maximum error of prediction of the area with hypoxia does not exceed 5.5 ⋅ 103 km2, i.e., less than 2% of the total area of the northwest shelf in the Black Sea (to the north of 45°N).


  1. 1.
    A. I. Mearns, “Seminary report of the panel on the effects of nutrients and carbon loadings on communities and ecosystems,” Glob. Mar. Poll. Bibliogr., Abstr. No. 993, 199 (1982).Google Scholar
  2. 2.
    D. A. Segar and G. A. Berberian, “Oxygen depletion in the New York Bight Apex: causes and consequences,” Glob. Mar. Poll. Bibliogr., Abstr. No. 1330, 266 (1982).Google Scholar
  3. 3.
    I. G. Orlova, R. R. Belevich, Yu. I. Popov, et al., “Dynamics of hypoxic processes in the bottom waters of the northwest shelf of the Black Sea,” Okeanologiya, 39, No. 4, 548–554 (1999).Google Scholar
  4. 4.
    P. Yu. Selin, Hydrochemical Specific Features of the Hypoxic-Anoxic Zones on the Northwest Shelf of the Black Sea [in Russian], Deposited Manuscript No. 298-V88, VINITI, Moscow (1987).Google Scholar
  5. 5.
    Yu. P. Zaitsev, “The bluest in the world,” in: Black-Sea Ecological Program of the Global Ecological Foundation [in Russian], UNO, New York (1998).Google Scholar
  6. 6.
    N. A. Berlinskii and Yu. M. Dykhanov, “On the problem of formation of bottom hypoxia in the northwest part of the Black Sea,” in: Ecology of the Sea [in Russian], Naukova Dumka, Kiev (1991), No. 38, pp. 11–15.Google Scholar
  7. 7.
    V. P. Keondzhyan, A. M. Kudin, and Yu. V. Terekhin (editors), Practical Ecology of Marine Regions. Black Sea [in Russian], Naukova Dumka, Kiev (1990).Google Scholar
  8. 8.
    P. Yu. Selin, N. N. Mikhailov, and N. V. Volkov, “Variations of the hydrochemical conditions of waters on the northwest shelf of the Black Sea,” in: Ecology of the Coastal Zone of the Black Sea [in Russian], VNIRO, Moscow (1992), pp. 59–100.Google Scholar
  9. 9.
    O. R. Andrianovna, R. R. Belevich, and M. I. Skipa, “On the specific features of variations of the climatic characteristics of Odessa in the 20th century,” Morsk. Gidrofiz. Zh., No. 4, 19–29 (2005).Google Scholar
  10. 10.
    T. Ogyz, V. L. Dorofeev, and G. K. Korotaev, “Modeling of the Black-Sea ecosystem,” Morsk. Gidrofiz. Zh., No. 1, 59–72 (2007).Google Scholar
  11. 11.
    T. Ogyz, H. W. Ducklow, J. E. Purcell, et al., “Modeling of the response of top-down control exerted by gelatinous carnivores on the Black-Sea pelagic food web,” J. Geophys. Res., 106, No. C3, 4543–4564 (2001).CrossRefGoogle Scholar
  12. 12.
    Yu. I. Popov, I. G. Orlova, P. A. Stunzhas, and V. V. Ukrainskii, “Results of investigation of the mechanism of formation of hypoxia on the northwest shelf of the Black Sea by using membraneless oxygen gages,” in: Systems of Monitoring of the Environment [in Russian], Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Sevastopol (2002), pp. 96–101.Google Scholar
  13. 13.
    L. A. Vinogradova, V. N. Vasil’eva, N. V. Derezyuk, et al., “An ecological model of functioning of the marine pelagic biocenosis,” Trudy GOIN, Issue 182, 134–164 (1990).Google Scholar
  14. 14.
    A. B. Polonsky, D. V. Basharin, E. N. Voskresenskaya, and S. J. Worley, “North-Atlantic Oscillation: description, mechanisms, and influence on the Eurasian climate,” Morsk. Gidrofiz. Zh., No. 2, 42–59 (2004).Google Scholar
  15. 15.
    E. N. Voskresenskaya, Global Processes in the Ocean–Atmosphere System and Their Influence on the Natural Anomalies in the Atlantic-European Region [in Russian], Author’s Abstract of the Doctoral Degree Thesis (Geography), Sevastopol (2005).Google Scholar
  16. 16.
    I. F. Gertman, “Statistical thermohaline analysis of Black-Sea waters in the course of their seasonal development,” Trudy GOIN, Issue 180, 45–58 (1987).Google Scholar
  17. 17.
    Hydrometeorology and Hydrochemistry of Seas in the USSR, Vol. 4: The Black Sea, Issue 1 [in Russian], Gidrometeoizdat, St.-Petersburg (1991).Google Scholar
  18. 18.
    V. V. Ukrainskii and Yu. I. Popov, “Zoning of waters in the northwest part of the Black Sea by their thermohaline indices,” in: Ecological Problems of the Black Sea [in Ukrainian], OTsNTI, Odessa (2003), pp. 374–377.Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2009

Authors and Affiliations

  • V. V. Ukrainskii
    • 1
  • Yu. I. Popov
    • 1
  1. 1.Ukrainian Scientific Center of Ecology of SeaUkrainian Ministry for Environmental ProtectionOdessaUkraine

Personalised recommendations