High-temporal-resolution chemical characterization of PM0.1 at a Mediterranean background site

Here we submit the measurements from the POSEIDON campaign (Poros, September 2024) that are presented and discussed in the manuscript titled 'High-temporal-resolution chemical characterization of PM0.1 at a Mediterranean background site'. The dataset includes: Hourly averages for PM0.1, N10, N50, Ultrafine BC, PM1, PM1-AMS-species (OA, Sulfate, Ammonium, Nitrate, Chloride), PM1-BC, and inorganic gases (SO2, O3, CO, CO2, NO, NOx, NO2) 2-h averages for PM0.1-AMS-species (OA, Sulfate, Ammonium, Nitrate, Chloride) 4-h measured PM0.1-Elements (only the corrected for blank and dilution, as shown in the manuscript) Daily PM2.5 Elements with corresponding Limits of Detection Number size distributions from the SMPS (dN/dlogDp, sizes 14-710nm)