Multiproxy analyses of multiple firn cores from coastal Adélie Land covering the last 40 years

This dataset compiles the data used in our publication “Multiproxy analyses of multiple firn cores from coastal Adélie Land covering the last 40 years” (Tcheng et al., 2025). The data {site_name}_unmatched_isotopes include the δ18O and δD values at a given depth in permil, for the individual firn cores at a given site (Stop0, Stop5 or D47). The data {site_name}_unmatched_chem includes the chemical impurities values ([Na+], [Cl-], [NO3-], [SO42-] and non-sea-salt sulfate in part per billion) for a range of depths delimitated by the minimum and the maximum depth values. The depth difference is display in the column “diff_depth_mm” and the mean depth value of the range is displayed in the column “mean_depth_mm”. Stacked δ18O and δD records are compiled in the files stack_{site_name} and feature the mean depth identified at a given date (in mm), the associated age before year 2017 (in year), the date (in year), the δ18O and δD values for the individual cores, for the stacked data and the minimum and maximum values of the individual cores (in permil). Files named VFC_{model_name}_{site_name} provide the Virtual Firn Cores δ18O values with their associated date for both ECHAM6-wiso and LMDZ6iso Atmospheric Global Circulation Model at a given site. Columns date_yr_{site_name}, date_abs_{site_name} and d18_int_{site_name}_permil provide the corresponding values when neither compaction nor diffusion is applied. Columns labeled “compact” correspond to the same values when compaction is applied. Columns labeled “diff” correspond to the same values when diffusion is applied with the diffusion length provided in columns “diff_length_{site_name}” All the depth provided are in millimeters (labeled “_mm”) or meters (labeled “_m”). The diffusion lengths of the Virtual Firn Cores are provided in millimeters.