Ground based in situ observations of steel_canister at Pallas (Sammaltunturi) (FI0096G). These measurements are gathered as a part of the following projects EMEP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: 1-3-butadiene in air (mass_fraction_of_13_butadiene_in_air), cis-2-pentene in air (mass_fraction_of_cis_2_pentene_in_air), propyne in air (mass_fraction_of_propyne_in_air), trans-2-pentene in air (mass_fraction_of_trans_2_pentene_in_air)