Ground based in situ observations of high_vol_sampler at Montseny (ES1778R). These measurements are gathered as a part of the following projects EMEP, GAW-WDCA, EUSAAR and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: aluminium in aerosol (mass_concentration_of_aluminium_in_dry_aerosol_particles_in _air), arsenic in aerosol (mass_concentration_of_arsenic_in_dry_aerosol_particles_in _air), barium in aerosol (mass_concentration_of_barium_in_dry_aerosol_particles_in _air), bismuth in aerosol (mass_concentration_of_bismuth_in_dry_aerosol_particles_in _air), cadmium in aerosol (mass_concentration_of_cadmium_in_dry_aerosol_particles_in _air), calcium in aerosol (mass_concentration_of_calcium_in_dry_aerosol_particles_in _air), cerium in aerosol (mass_concentration_of_cerium_in_dry_aerosol_particles_in _air), chloride in aerosol (mass_concentration_of_chloride_in_dry_aerosol_particles_in _air), chromium in aerosol (mass_concentration_of_chromium_in_dry_aerosol_particles_in _air), cobalt in aerosol (mass_concentration_of_cobalt_in_dry_aerosol_particles_in _air), copper in aerosol (mass_concentration_of_copper_in_dry_aerosol_particles_in _air), iron in aerosol (mass_concentration_of_iron_in_dry_aerosol_particles_in _air), lanthanum in aerosol (mass_concentration_of_lanthanum_in_dry_aerosol_particles_in _air), potassium in aerosol (mass_concentration_of_potassium_in_dry_aerosol_particles_in _air), total_carbon in aerosol (mass_concentration_of_total_carbon_in_dry_aerosol_particles_in _air)