This dataset for historic ambient CH₄ mole fractions is an important outcome of the FP7 InGOS project (http://www.ingos-infrastructure.eu, Grant Agreement Number 284274). Data from 17 stations have been reprocessed for the period 2000-2015; in some cases involving re-integration of chromatograms and in all cases re-calibrating the time series using updated assigned values for standard gases and target gases. All data have been brought to the same concentration scale (NOAA-2006A).

This is the release of the observational data product for eddy covariance fluxes at 52 stations in the ecosystem domain, part of them outside the ICOS network, from the Drought-2018 team and covering the period 1989-2018. The data are in the standard format used for the ICOS L2 ecosystem products and also used by other regional networks like AmeriFlux.

Near Real-Time growing time series containing data from the atmospheric network of ICOS Research Infrastructure for the stations shown below in the tables. This collection contains the NRT hourly averaged data for the mole fractions of CO₂, CO and CH₄, measured at the relevant vertical levels of the measurements stations, starting from the latest date of final released Level 2 data or the date of labelling.