Ground based in situ observations of dmps at Birkenes II (NO0002R). These measurements are gathered as a part of the following projects ACTRIS_NRT, EMEP_NRT, GAW-WDCA_NRT, NILU_NRT and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: aerosol_light_backscattering_coefficient in pm10, aerosol_light_backscattering_coefficient in pm10, aerosol_light_backscattering_coefficient in pm10, aerosol_light_scattering_coefficient in pm10, aerosol_light_scattering_coefficient in pm10, aerosol_light_scattering_coefficient in pm10