Ground based in situ observations of lvs_QBQ at Birkenes (NO0001R). These measurements are gathered as a part of the following projects NILU, EMEP, CAMPAIGN and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: elemental_carbon in pm10 (mass_concentration_of_elemental_carbon_in_pm10_in_air), organic_carbon in pm10 (mass_concentration_of_organic_carbon_in_pm10_in_air), organic_carbon_corrected in pm10 (mass_concentration_of_organic_carbon_corrected_in_pm10_in_air), total_carbon in pm10 (mass_concentration_of_total_carbon_in_pm10_in_air), total_carbon_corrected in pm10 (mass_concentration_of_total_carbon_corrected_in_pm10_in_air)