Abstract
Major processes of generation of the methane field in the atmosphere over northwestern Russia have been studied on the basis of measured surface concentration and total content of methane in the environs of St. Petersburg, air-mass trajectories, and a three-dimensional regional pollution transport model. It is shown that the contribution of methane emission from an industrial center to the total column amount of methane is no more than 2% of its average value. At the same time, because of this emission, the surface methane concentration in the environs of St. Petersburg varies by as much as 50%. The origin of air masses arriving at the site of measurements influences both the total content and the surface concentration of methane. The air masses that passed over the continental part of western and eastern Europe are characterized by the values of total content and surface concentration of methane that are about 4% higher than those in the air masses formed over the ocean, which come to the region from the northwest. The regional transport model for greenhouse gases satisfactorily describes the results of surface measurements and adequately simulates observed tendencies in the change of total methane content. An estimate of the integral emission of methane into the atmosphere from St. Petersburg and its industrial suburbs is about 100 kt per year.
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Original Russian Text © M.V. Makarova, A.V. Poberovskii, S.V. Yagovkina, I.L. Karol’, V.E. Lagun, N.N. Paramonova, A.I. Reshetnikov, V.I. Privalov, 2006, published in Izvestiya AN. Fizika Atmosfery i Okeana, 2006, Vol. 42, No. 2, pp. 237–249.
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Makarova, M.V., Poberovskii, A.V., Yagovkina, S.V. et al. Study of the formation of the methane field in the atmosphere over northwestern Russia. Izv. Atmos. Ocean. Phys. 42, 215–227 (2006). https://doi.org/10.1134/S0001433806020083
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DOI: https://doi.org/10.1134/S0001433806020083