AirCore is an atmospheric sampler flying under a meteorological balloon, that allows the measurement of the vertical profiles (from the surface up to about 30 km of altitude) of atmospheric mixing ratio of greenhouse gases (CO2, CH4, CO, N2O) during the descent of the balloon. A new release of the AirCore dataset reanalysis is available on AERIS platform, including all Level 2 gas vertical profiles along with Level 1 meteosonde and trajectory data, acquired by the French AirCore program from 2014 to 2023 in France and worlwide.
Link: https://aircore.aeris-data.fr (use “DATA ACCESS” tab for data access).