Ground based in situ observations of online_gc at Zeppelin mountain (Ny-Ålesund) (NO0042G). These measurements are gathered as a part of the following projects SOGE, NILU and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: CFC-11 in air (mass_fraction_of_cfc11_in_air), CFC-113 in air (mass_fraction_of_cfc113_in_air), CFC-115 in air (mass_fraction_of_cfc115_in_air), CFC-12 in air (mass_fraction_of_cfc12_in_air), H-1211 in air (mass_fraction_of_halon1211_in_air), H-1301 in air (mass_fraction_of_halon1301_in_air), HCFC-141b in air (mass_fraction_of_hcfc141b_in_air), HCFC-142b in air (mass_fraction_of_hcfc142b_in_air), HCFC-22 in air (mass_fraction_of_hcfc22_in_air), HFC-125 in air (mass_fraction_of_hydrofluorocarbon_125_in_air), HFC-134a in air (mass_fraction_of_hydrofluorocarbon_134a_in_air), HFC-152a in air (mass_fraction_of_hydrofluorocarbon_152a_in_air), bromomethane in air (mass_fraction_of_methyl_bromide_in_air), chloromethane in air (mass_fraction_of_chloromethane_in_air), dichloromethane in air (mass_fraction_of_dichloromethane_in_air), sulfur_hexafluoride in air (mass_fraction_of_sulfur_hexafluoride_in_air), tetrachloroethene in air (mass_fraction_of_tetrachloroethene_in_air), trichloroethane in air (mass_fraction_of_trichloroethane_in_air), trichloroethene in air (mass_fraction_of_trichloroethene_in_air), trichloromethane in air (mass_fraction_of_trichloromethane_in_air)