Complex assessment of air composition over the Russian sector of the Arctic in September 2020
P.N. Antokhin, V.G. Arshinova, M.Yu. Arshinov, B.D. Belan, S.B. Belan, D.K. Davydov, G.A. Ivlev, A.V. Kozlov, T.M. Rasskazchikova, D.E. Savkin, D.V. Simonenkov, T.K. Sklyadneva, G.N. Tolmachev, A.V. Fofonov
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: Arctic, atmosphere, aerosol, vertical distribution, sulfur dioxide, methan, ozone, nitrogen oxides, carbon oxides, transport, composit
Abstract
In the Arctic, climate warming is occurring several times faster than in other regions of the globe. This сan be the result of strengthening feedbacks between climate and atmospheric composition. However, there are very few data on changes in the concentration of climatically active substances in this region. Therefore, to fill the gap in data on the vertical distribution of gas and aerosol composition of the air over the Russian Arctic, an airborne survey of the atmosphere and water surface over the all Russian seas of the Arctic Ocean was performed with use of the Tu-134 Optik aircraft laboratory in September 2020. This paper analyzes the spatial distribution of gas and aerosol composition in the Arctic troposphere. It is shown that during the experiment, the CO2 mixing ratio changed from west to east in the opposite direction in the near-water and boundary layers compared to the free troposphere (FT), namely, it was increasing in the planetary boudary layer (PBL) and was decreasing in the FT. The methane content in the near-water layer decreased in the same direction. Concentrations of CO, NO X , and SO2 in the Russian Arctic were very low, which is typical for remote background areas. All aerosol fractions also showed a decrease in their content from west to east.
|
