Variations in Surface Concentrations and Total Column of CO2 and CH4 in the Central Part of the European Territory of Russia

The results of measurements of surface concentrations and the total column of atmospheric carbon dioxide and methane at Obninsk station by IR spectroscopy are presented. The description of the MR32/MGC equipment for monitoring the gaseous composition of the atmosphere is given. Interannual and seasonal variations and trends in surface concentrations of CO 2 and CH 4 for 1998–2021 and the total column for 2015–2021 are analyzed. According to the results of cross-correlation wavelet analysis, the phase of annual variations in the column-averaged CH 4 concentrations is ahead of the phase of surface variations by 2–3 months, and the variations in column-averaged CO 2 concentrations lag behind the phase of annual variations in surface values by 1–2 months. The minimum surface concentrations of methane in May–August coincide with the column-averaged concentrations, and for carbon dioxide in the same period they are 20–30 ppm lower. In winter months, the minimum surface concentrations of methane and carbon dioxide are consequently higher than column-averaged values by 70–150 ppb and 6–15 ppm. The measurement results are compared with the Greenhouse gases Observing SATellite (GOSAT) and data from European ground stations.