Estimation of Anthropogenic Methane Emissions for Some Areas of Siberia Based on the ECCAD Service and Correlation of Service Data with Ground Measurements for the Teriberka Area

Based on the CAMS-GLOB-ANT database of the ECCAD online- service, an estimate of the average annual variations in anthropogenic methane emissions for the Urengovskoye field and individual coal mines of Kuzbass, Krasnoyarsk Territory, Irkutsk Region and Buryatia for the period 2000–2023 was made. For each grid cell with a size of 0.1° × 0.1° according to the CAMS-GLOB-ANT inventory, information on the volume of CH leakage per month or year is available. Significant changes in the operation of sites (termination) are tracked by jumps in CH emissions. A comparison of methane emissions from coal mines with field leaks within the grid cell showed that CH emissions in coal mines are almost 10 times higher than field leaks. Methane leaks in the field during production and transportation have tended to decrease since 2015. For coal mines, there is a positive trend in methane emissions. A close relationship is shown between ground-based measurements of methane concentration in Teriberka and an estimate of methane emissions based on CAMS-GLOB-ANT inventory data.