Abstract
The short-term variability of the methane column has been analyzed based on ground-based observations and numerical modeling at the St. Petersburg NDACC station for 2009–2016. The methane variability for different atmospheric altitude layers is presented. Short-term methane variability is found to be significant compared to long-term trends. The results of numerical experiments with the global chemistry-transport model of the troposphere and stratosphere demonstrate that short-term methane variability is basically defined by methane concentration changes between an altitude of 5 km and 20 km.
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ACKNOWLEDGMENTS
The analysis of the measurement and modeling results was performed as part of project no. 14-17-00096 of the Russian Scientific Foundation. The influence of arctic sources of methane was estimated as part of the project no. 17-05-01277-а of the Russian Foundation for Basic Research. The global model of the gas composition of the atmosphere is developed within the state assignment of the Ministry of Education and Science of the Russian Federation (project no. 5.6493.2017/8.9).
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Translated by M. Chubarova
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Cherepova, M.V., Smyshlyaev, S.P., Makarova, M.V. et al. A Study of the Column Methane Short-Term Variability in the Atmosphere on a Regional Scale. Izv. Atmos. Ocean. Phys. 54, 558–569 (2018). https://doi.org/10.1134/S0001433818060038
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DOI: https://doi.org/10.1134/S0001433818060038