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Dynamics of Dissolved Inorganic Carbon and CO2 Fluxes between the Water and the Atmosphere in the Main Channel of the Ob River

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Abstract

The results of studying the dynamics of parameters of the carbonate system in the middle and lower reaches of the Ob River in July 2016 were analyzed. The distributions of the carbonate characteristics of the river waters were found to follow a steady latitudinal trend determined by the landscape-geochemical conditions of the drainage basin and by the permafrost distribution. The first field data on the magnitude and direction of the CO2 fluxes in the Ob River water–atmosphere system were presented. It was shown that the waters in the middle and lower reaches of the river are multiply supersaturated with CO2 with respect to its atmospheric content, and the daily average evasion reaches 625.9 mmol m–2 day–1 at an average value of 102.1 mmol m–2 day–1. It was determined that the waters of the Ob River in the studied reaches are a significant CO2 source to the atmosphere; according to conservative estimates, the total flux in July was 2 × 1011 g of carbon in the form of CO2.

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ACKNOWLEDGMENTS

This work was supported by the Government of the Russian Federation (project no. 14.Z50.31.0012); the field studies, by the Russian Science Foundation (project no. 15–17–20032); and the analytical studies, by the Russian Foundation for Basic Research (project no. 18–05–00559).

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Authors and Affiliations

  1. Il’ichev Pacific Oceanological Institute, Far-East Branch, Russian Academy of Sciences, 690041, Vladivostok, Russia

    I. I. Pipko, S. P. Pugach &  I. P. Semiletov

  2. Tomsk National Research Polytechnic University, 634050, Tomsk, Russia

    O. G. Savichev, N. E. Shakhova, Yu. A. Moiseeva &  I. P. Semiletov

  3. Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, 119017, Moscow, Russia

    I. A. Repina & K. V. Barskov

  4. Presidium, Far-East Branch, Russian Academy of Sciences, 690091, Vladivostok, Russia

    V. I. Sergienko

Authors
  1. I. I. Pipko
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  2. S. P. Pugach
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  3. O. G. Savichev
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  4. I. A. Repina
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  5. N. E. Shakhova
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  6. Yu. A. Moiseeva
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  7. K. V. Barskov
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  8. V. I. Sergienko
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  9. I. P. Semiletov
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Corresponding author

Correspondence to I. I. Pipko.

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Translated by V. Glyanchenko

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Pipko, I.I., Pugach, S.P., Savichev, O.G. et al. Dynamics of Dissolved Inorganic Carbon and CO2 Fluxes between the Water and the Atmosphere in the Main Channel of the Ob River. Dokl Chem 484, 52–57 (2019). https://doi.org/10.1134/S0012500819020101

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  • DOI: https://doi.org/10.1134/S0012500819020101

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