Measurements of concurrent changes in both the atmospheric O₂ and CO₂ mixing ratios have been proven to be useful independent information for the partitioning of anthropogenic CO₂ into its different sinks [e.g. Keeling et al., 1996]. This information is used along with the “classical” partitioning models that make use of CO₂ concentration and (radioactive as well as stable) isotopic composition information [e.g. Keeling et al., 1995]. Global carbon budget reconstruction needs long time series observations of global means. Downscaling to a more regional assessment introduces a closer relation to possible annual and regional variations in prescribed oxidative ratios of biospheric and combustion processes. With the goal of improving the knowledge on the temporal and local variability of the O₂/ CO₂ signal, we present the results of the analysis on an extended data set from the remote station of Lutjewad (The Netherlands) and compare them with the findings of different other sampling stations in Europe, starting from 2001 till present.