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The Sea of Azov is one of the enclosed seas of the Mediterranean basin. The Sea underwent significant physical, chemical and biological transformations from the mid-twentieth century till now, which negatively affects its biological productivity. We analyzed these changes in the Sea of Azov using our observation database from 90,6 thousands of oceanographic observation sites for the period 1881–2020 years and elaborated a set of quantitative indicators reflecting climate change and anthropogenic impact upon the Sea’s ecosystem. We used four criteria to establish the quantitative indicators: data availability, range of indicator’s change, tradition of use in similar research and relation to biological productivity of the Sea. We distinguished for our set two physical, two chemical and four biological indicators at annual time step. Averaged over the surface annual sea temperature and sea water salinity (physical indicators) appeared to be strongest indicators for reflecting climate change and human impacts. The unprecedented simultaneous increase in sea temperature and salinity in the last two decades posed negative consequences for environmental status of the Sea of Azov. Elaborate set of quantitative indicators will be used for environmental monitoring of the Sea and for further research.

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Physical, Chemical and Biological Changes in the Sea of Azov as Indicators of Climate Change and Anthropogenic Impact from the Mid-Twentieth Century Till Now

  • 会议论文

  • 发表日期：

    2025年

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  • Sergey Berdnikov,
  • Sergey Venevsky,
  • Vera Sorokina,
  • Aleksey Kleshchenkov,
  • Yuri Tyutyunov,
  • Valerii Kulygin,
  • Galina Kovaleva,
  • Natalya Bulysheva

摘要

The Sea of Azov is one of the enclosed seas of the Mediterranean basin. The Sea underwent significant physical, chemical and biological transformations from the mid-twentieth century till now, which negatively affects its biological productivity. We analyzed these changes in the Sea of Azov using our observation database from 90,6 thousands of oceanographic observation sites for the period 1881–2020 years and elaborated a set of quantitative indicators reflecting climate change and anthropogenic impact upon the Sea’s ecosystem. We used four criteria to establish the quantitative indicators: data availability, range of indicator’s change, tradition of use in similar research and relation to biological productivity of the Sea. We distinguished for our set two physical, two chemical and four biological indicators at annual time step. Averaged over the surface annual sea temperature and sea water salinity (physical indicators) appeared to be strongest indicators for reflecting climate change and human impacts. The unprecedented simultaneous increase in sea temperature and salinity in the last two decades posed negative consequences for environmental status of the Sea of Azov. Elaborate set of quantitative indicators will be used for environmental monitoring of the Sea and for further research.