Ground based in situ observations of cobalt at Westerland (DE0001R) using low_vol_sampler. These measurements are gathered as a part of the following projects HELCOM, CAMP, EMEP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: cobalt in pm10 (mass_concentration_of_cobalt_in_pm10_in_air)