Air composition over the Russian sector of the Arctic. 2. Carbon dioxide
O.Yu. Antokhina1, P.N. Antokhin1, V.G. Arshinova1, M.Yu. Arshinov1, G. Ancellet2, B.D. Belan1, S.B. Belan1, E.V. Guruleva1, D.K. Davydov1, G.A. Ivlev1, A.V. Kozlov1, K. Law2, P. NГ©dГ©lec3, T.M. Rasskazchikova1, J.-D. Paris4, D.E. Savkin1, D.V. Simonenkov1, T.K. Sklyadneva1, G.N. Tolmachev1, A.V. Fofonov1
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
2Laboratoire AtmosphГЁres, Milieux, Observations Spatiales, Paris, France
3Laboratoire d’Aerologie CNRS-UPS, Toulouse, France
4Laboratoire des Sciences du Climat et de l’Environnement, LSCE/IPSL, CNRS-CEA-UVSQ, Gif-sur-Yvette, France
Keywords: Arctic, atmosphere, air, vertical distribution, carbon dioxide, greenhouse gases, transport, impurities, composition
Abstract
The work analyzes the spatial distribution of carbon dioxide over the seas of the Russian sector of the 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 396 ppm was over the Barents Sea, and the maximum, over the Chukchi Sea - 4106 ppm. The difference in concentrations between a level of 200 m and the free troposphere reached -156 ppm over the Barents Sea and decreased to -56 ppm over the Laptev Sea. Over the eastern seas, the difference generally became positive, which was associated with the air transfer from Alaska. Above the waters of most seas, horizontal heterogeneity in the distribution of carbon dioxide was observed, reflecting the regional features of its assimilation by the ocean and transfer from the continent.
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