Suchergebnisse

The results of measurements of surface concentrations and the total column of atmospheric carbon dioxide and methane at Obninsk station by the method of IR spectroscopy are presented. The description of the MR-32/MGС equipment for monitoring the gaseous composition of the atmosphere is given. Interannual and seasonal variations and trends in surface concentrations of CO2 and CH4 for 1998-2021 and total column for 2015–2021are analyzed. According to the results of cross-correlation wavelet analysis, the phase of annual variations in the column-averaged CH4 concentrations is ahead of the phase of surface variations by 2–3 months, and the variations in column-averaged CO2 concentrations lag behind the phase of annual variations in surface values by 1–2 months. The minimum surface concentrations of methane in May-A-ugust coincide with the column-averaged concentrations, and for carbon dioxide in the same period they are lower by 20–30 ppm. In the winter months, the minimum surface concentrations of methane and carbon dioxide are higher than column-averaged values by 70–150 ppb and by 6–15 ppm consequently. The measurement results are compared with GOSAT and data from European ground stations.