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Air Composition over the Russian Arctic: 2–Carbon Dioxide

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Abstract

We analyze the spatial distribution of carbon dioxide over the seas of the Russian Arctic based on the results of the comprehensive experiment conducted in September 2020. It turned out that during the experiment, the concentration of CO2 increased from west to east. The minimum of 396 ppm was over the Barents Sea, and the maximum of 4106 ppm was over the Chukchi Sea. The difference between the concentrations at an altitude of 200 m and in the free troposphere attained 156 ppm over the Barents Sea and decreased to 56 ppm over the Laptev Sea. Over the eastern seas, the difference became generally positive, which was associated with the air transfer from Alaska. Above the waters of most seas, the distribution of carbon dioxide was horizontally heterogeneous, which showed the regional features of its assimilation by the ocean and transfer from the continent.

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Funding

Atmospheric sounding was carried out on the Tu-134 Optik flying laboratory created under support of the Ministry of Science and Higher Education of the Russian Federation (V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences). Data processing and analysis of the results were carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation with in the project “Study of Anthropogenic and Natural Factors of Changes in the Air Composition and Environmental Objects in Siberia and the Russian Arctic under the Rapid Climate Change with the use of the USCTu-134 Optik Flying Laboratory” (agreement no. 075-15-2021-934).

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Antokhina, O.Y., Antokhin, P.N., Arshinova, V.G. et al. Air Composition over the Russian Arctic: 2–Carbon Dioxide. Atmos Ocean Opt 36, 490–500 (2023). https://doi.org/10.1134/S1024856023050044

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