Carbonate characteristics of the Gulf of Anadyr waters

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Abstract

The first field data describing the dynamics of the carbonate system, aragonite saturation state, and CO2 fluxes between the ocean and the atmosphere in the Gulf of Anadyr in the late autumn season are presented. It was established that during this period the gulf waters absorbed carbon dioxide from the atmosphere at a rate of -22,5 mmol m‑2 day‑1, which determined the “classical” mechanism of seawater acidification due to uptake of excess atmospheric CO2. In general, surface waters of the gulf were supersaturated with respect to aragonite. The exception was the highly dynamic region of Anadyr Strait, where the vertical distribution of the investigated parameters was homogeneous, the surface waters were close to equilibrium with respect to aragonite, and CO2 flux was directed to the atmosphere. Bottom waters of the gulf, in contrast, were characterized by significant seasonal corrosivity with respect to aragonite due primarily to remineralization of organic matter to CO2. It was shown that during the late fall relatively salty and acidic, quasi-equilibrium with respect to aragonite, and oxygen-depleted waters with high concentrations of nutrients and CO2 have been entered the Chirkov Basin and further the Arctic Ocean with the Navarin current.

About the authors

I. I. Pipko

Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences

Author for correspondence.
Email: Irina@poi.dvo.ru
Russian Federation, 43, Baltiyskaya str., Vladivostok, 690041

S. P. Pugach

Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences

Email: Irina@poi.dvo.ru
Russian Federation, 43, Baltiyskaya str., Vladivostok, 690041

N. I. Savelieva

Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences

Email: Irina@poi.dvo.ru
Russian Federation, 43, Baltiyskaya str., Vladivostok, 690041

V. A. Luchin

Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences

Email: Irina@poi.dvo.ru
Russian Federation, 43, Baltiyskaya str., Vladivostok, 690041

O. V. Dudarev

Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences; National Research Tomsk Polytechnic University

Email: Irina@poi.dvo.ru
Russian Federation, 43, Baltiyskaya str., Vladivostok, 690041; 30, Lenina prospect, Tomsk, 634034

V. I. Sergienko

Institute of Chemistry, Far Eastern Branch of the Russian Academy of Sciences

Email: Irina@poi.dvo.ru

Academician or the Russian Academy of Sciences

Russian Federation, 159, Prospekt 100-letya Vladivostoka, Vladivostok, 690022

I. P. Semiletov

Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences; National Research Tomsk Polytechnic University

Email: Irina@poi.dvo.ru

Corresponding Member of the Russian Academy of Sciences

Russian Federation, 43, Baltiyskaya str., Vladivostok, 690041; 30, Lenina prospect, Tomsk, 634034

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