Ground based in situ observations of NA at Hvasser (NO0232R). These measurements are gathered as a part of the following projects NILU and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: cadmium in aerosol (mass_concentration_of_cadmium_in_dry_aerosol_particles_in _air), lead in aerosol (mass_concentration_of_lead_in_dry_aerosol_particles_in _air)