Global Greenhous Gas Reconciliation 2025

`Inversions_CO2_v2026.csv` contains national net CO2 land fluxes from 15 atmospheric inversion models. Fluxes are reported in TgC/yr. The `land` sector is the unadjusted net ecosystem exchange, whereas `land_cor` includes the lateral carbon-flux adjustment. The `observation` field distinguishes in-situ- and satellite-constrained inversions. `lateral_CO2_v2026.csv` contains the national river-transport and crop, wood, and biofuel trade components used for the lateral adjustment, in TgC/yr. Summing `value` over `variable` for each country and year gives the lateral correction applied to `land`. `Inversions_CH4_v2026.csv` contains national CH4 fluxes in TgCH4/yr for the GCP-Surf and GCP-Sat ensembles through 2020 and the OH-based extension for 2019-2023. The sectors are fossil fuel (`fos`), agriculture and waste (`agrw`), biomass burning (`bbur`), and total anthropogenic emissions (`ant`). The latter is harmonized using GFED5.1 wildfire emissions. For the OH-based extension, `value` is shifted by a constant country-sector offset to match the GCP-Sat median in 2019, while `value_raw` preserves the unshifted value. `Inversions_N2O_v2026.csv` contains national N2O fluxes from four inversion models in TgN/yr. The `ant` sector contains the original inversion estimate, and `ant_new` is the harmonized anthropogenic estimate after subtracting GFED5.1 wildfire emissions, the preindustrial lake and river background, and the OCN natural-soil background. `NGHGIs_v2026.csv` contains the processed national inventory records used in this study, in Gg/yr. It combines UNFCCC national communications, biennial update reports, biennial transparency reports, and 2025 national inventory reports.