Ground based in situ observations of low_vol_sampler at Birkenes II (NO0002R). These measurements are gathered as a part of the following projects ACTRIS, EMEP, NILU and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: galactosan in pm10 (mass_concentration_of_galactosan_in_pm10_in_air), levoglucosan in pm10 (mass_concentration_of_levoglucosan_in_pm10_in_air), mannosan in pm10 (mass_concentration_of_mannosan_in_pm10_in_air)