, Volume 20, Issue 6, pp 435-450

Intraannual and long-term variations of the carbonate system of the aerobic zone in the black sea

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We provide an expert quality assessment of the data for 1932–1993 and used these data to perform the numerical analysis of the carbonate system of the aerobic zone in the Black Sea. The intraannual and long-term variations of the carbonate system are studied in the abyssal part of the sea for 1960–1993. We propose explanations of the intraannual variations of the analyzed system for various layers of the aerobic zone and reveal long-term variations of the pH values, total alkalinity, and the ratios of the components of the carbonate system. We discover and explain the observed increase in the concentrations of TCO2 and CO2 and the partial pressure of carbon dioxide pCO2, as well as a decrease in pH values and the concentration of CO 3 2− in waters of the aerobic zone of the Black Sea.

Translated from Morskoi Gidrofizicheskii Zhurnal, No. 6, pp. 42–57, November–December, 2010.