Ground based in situ observations of bulk_sampler at Birkenes (NO0001R). These measurements are gathered as a part of the following projects CAMP, EMEP, NILU and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: precipitation_amount in precip (lwe_thickness_of_precipitation_amount), 1-methylnaphthalene in precip (mass_concentration_of_1_methylnaphthalene_in_precipitation), 1-methylphenanthrene in precip (mass_concentration_of_1_methylphenanthrene_in_precipitation), 2-methylanthracene in precip (mass_concentration_of_2_methylanthracene_in_precipitation), 2-methylnaphthalene in precip (mass_concentration_of_2_methylnaphthalene_in_precipitation), 2-methylphenanthrene in precip (mass_concentration_of_2_methylphenanthrene_in_precipitation), 3-methylphenanthrene in precip (mass_concentration_of_3_methylphenanthrene_in_precipitation), 9-methylphenanthrene in precip (mass_concentration_of_9_methylphenanthrene_in_precipitation), acenaphthene in precip (mass_concentration_of_acenaphthene_in_precipitation), acenaphthylene in precip (mass_concentration_of_acenaphthylene_in_precipitation), anthanthrene in precip (mass_concentration_of_anthanthrene_in_precipitation), anthracene in precip (mass_concentration_of_anthracene_in_precipitation), benz_a_anthracene in precip (mass_concentration_of_benz_a_anthracene_in_precipitation), benzo_a_fluoranthene in precip (mass_concentration_of_benzo_a_fluoranthene_in_precipitation), benzo_a_fluorene in precip (mass_concentration_of_benzo_a_fluorene_in_precipitation), benzo_a_pyrene in precip (mass_concentration_of_benzo_a_pyrene_in_precipitation), benzo_b_fluorene in precip (mass_concentration_of_benzo_b_fluorene_in_precipitation), benzo_bjk_fluoranthenes in precip (mass_concentration_of_benzo_bjk_fluoranthenes_in_precipitation), benzo_e_pyrene in precip (mass_concentration_of_benzo_e_pyrene_in_precipitation), benzo_ghi_fluoranthene in precip (mass_concentration_of_benzo_ghi_fluoranthene_in_precipitation), benzo_ghi_perylene in precip (mass_concentration_of_benzo_ghi_perylene_in_precipitation), biphenyl in precip (mass_concentration_of_biphenyl_in_precipitation), chrysene_triphenylene in precip (mass_concentration_of_chrysene_triphenylene_in_precipitation), coronene in precip (mass_concentration_of_coronene_in_precipitation), cyclopenta_cd_pyrene in precip (mass_concentration_of_cyclopenta_cd_pyrene_in_precipitation), dibenzo_ac_ah_anthracenes in precip (mass_concentration_of_dibenzo_ac_ah_anthracenes_in_precipitation), dibenzo_ae_pyrene in precip (mass_concentration_of_dibenzo_ae_pyrene_in_precipitation), dibenzo_ah_pyrene in precip (mass_concentration_of_dibenzo_ah_pyrene_in_precipitation), dibenzo_ai_pyrene in precip (mass_concentration_of_dibenzo_ai_pyrene_in_precipitation), dibenzofuran in precip (mass_concentration_of_dibenzofuran_in_precipitation), dibenzothiophene in precip (mass_concentration_of_dibenzothiophene_in_precipitation), fluoranthene in precip (mass_concentration_of_fluoranthene_in_precipitation), fluorene in precip (mass_concentration_of_fluorene_in_precipitation), inden_123cd_pyrene in precip (mass_concentration_of_inden_123cd_pyrene_in_precipitation), naphthalene in precip (mass_concentration_of_naphthalene_in_precipitation), perylene in precip (mass_concentration_of_perylene_in_precipitation), phenanthrene in precip (mass_concentration_of_phenanthrene_in_precipitation), pyrene in precip (mass_concentration_of_pyrene_in_precipitation), retene in precip (mass_concentration_of_retene_in_precipitation)