Mesoscale (β and γ) features of the distribution of gas composition of air in the region of Tomsk
M.Yu. Arshinov, B.D. Belan, S.B. Belan, D.K. Davydov, A.V. Kozlov, O.O. Marchenko
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: atmosphere, sulfur dioxide, methane, ozone, nitrogen oxides, carbon oxides, transport, composition
Abstract
According to the conclusion of the UN Intergovernmental Panel on Climate Change (IPCC), in order to determine the main causes of global warming caused by the increase in greenhouse gas content, an accurate assessment of their emissions and sinks is required, since there is still significant uncertainty in assessing their balance. To clarify this, the present work studies the heterogeneity in the distribution of their flows and sinks at the mesoscale level. Considering that soil plays a significant role in gas exchange processes, which significantly differ in properties on both scales, this approach seems very promising. The work uses hourly measurement data from three posts of integrated air composition monitoring: TOR station, the “Fonovaya” observatory, and the Basic Experimental Complex (BEC). It is shown that the differences in long-term (2013-2017) average concentrations between stations are within the ranges 116-195 mg/m3 for CO, 3.3-8.3 ppm for CO2, 0.4-0.8 mg/m3 for NO, 4.6-15.5 mg/m3 for NO2, 8.1-14.3 mg/m3 for O3, and 2.3-6.9 mg/m3 for SO2. Annual and daily variations in the concentration differences have been revealed for the first time. The results expand our knowledge of the dynamics of greenhouse and oxidizing gases in the atmosphere and can be useful in developing requirements for their measurement accuracy.
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