Ground based in situ observations of equivalent_black_carbon at Finokalia (GR0002R) using filter_absorption_photometer. These measurements are gathered as a part of the following projects ACTRIS, EMEP, GAW-WDCA and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: equivalent_black_carbon in pm10 (mass_concentration_of_equivalent_black_carbon_in_pm10_in_air)