Atmospheric Greenhouse Gas Mole Fractions of CO2 and CH4 collected in Europe, covering the period 1972-2022 for CO2 and 1984-2022 for CH4, including final quality-controlled Level 2 ICOS data, release L2-2022.1. During the most recent period, a selected set of stations, after being labelled as ICOS stations, follow the ICOS Atmospheric Station specification V1.3. All concentrations are calibrated to the WMO X2019 CO2 mole fraction scale in µmole/mole (ppm), and WMO X2004A CH4 mole fraction scale in nmole/mole (ppb).