статья в журнале

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Ecological Safety of Coastal and Shelf Zones of Sea

ISSN:24135577

2025

The paper studies dynamics of carbonate system parameters during the spring-summer coccolithophores bloom using data on temperature, salinity, carbonate system parameters (СО2, pH and alkalinity) and backscattering index (bbp(550), m‒1) for the northern Black Sea surface waters during the 127thand 131stcruises of R/V Professor Vodyanitsky. Within the studied periods (June 2023, May–June 2024) coccolithophores concentrations exceeded 1.00 million cells/L, while high рСО2(mean 486 ± 18 µatm) was also observed. The surface water layer was oversaturated with СО2compared to the atmosphere, with a mean water СО2supersaturation of 14% (58 μatm). However, no pronounced relationship was found between coccolith concentrations and рСО2, pH and alkalinity values, which may indicate a non-core contribution of the bloom to СО2concentrations in the surface waters. It was found that even during the coccolithophores blooming period, temperature is the key factor determining the surface waters рСО2. The spatial distribution of suspended matter concentration represented by coccoliths was determined by water dynamics and current structure in the Black Sea.

Black Sea, carbon dioxide partial pressure, carbonate system, coccolithophores

2-s2.0-105019710326

2025-11-12 15:43:41 (квартал- III)