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Abstract <p>The results of annual monitoring of the carbonate system parameters and CO<sub>2</sub> exchange in the coastal waters of the Black Sea (Blue Bay, “Gelendzhik” carbon supersite) during 2024 are presented. The research revealed pronounced seasonal dynamics of pH (8.14‒8.51), total alkalinity (3148‒3870 µM), partial pressure of CO<sub>2</sub> in water (417‒569 ppm) and atmosphere (404‒448 ppm). The analysis of CO<sub>2</sub> fluxes demonstrated predominant CO<sub>2</sub> emissions to the atmosphere over the most part of the year, with short periods of uptake during winter. The calculated annual CO<sub>2</sub> exchange showed net emissions of 112 tons of carbon from the water area of 18 km<sup>2</sup>. The obtained data are of significant importance for understanding the role of Black Sea coastal ecosystems in the global carbon cycle and can be used for verification of regional climate models.</p>

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Annual Variability of CO2 Flux at the Carbon Polygon in the Northeastern Black Sea

  • 期刊论文

  • 发表日期：

    2026年2月22日

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  • A. A. Polukhin,
  • Yu. V. Murzakova,
  • Yu. O. Pronina,
  • A. O. Varvarova,
  • Yu. A. Khoroshilov,
  • E. A. Rebetskaya,
  • V. V. Ocherednik,
  • V. V. Kremenetsky,
  • S. K. Gulev

摘要

Abstract

The results of annual monitoring of the carbonate system parameters and CO2 exchange in the coastal waters of the Black Sea (Blue Bay, “Gelendzhik” carbon supersite) during 2024 are presented. The research revealed pronounced seasonal dynamics of pH (8.14‒8.51), total alkalinity (3148‒3870 µM), partial pressure of CO2 in water (417‒569 ppm) and atmosphere (404‒448 ppm). The analysis of CO2 fluxes demonstrated predominant CO2 emissions to the atmosphere over the most part of the year, with short periods of uptake during winter. The calculated annual CO2 exchange showed net emissions of 112 tons of carbon from the water area of 18 km2. The obtained data are of significant importance for understanding the role of Black Sea coastal ecosystems in the global carbon cycle and can be used for verification of regional climate models.