Martinot P. L. auteur aut IRD Guigue Catherine auteur aut IRD Guyomarc'h L. auteur aut IRD Mari Xavier auteur aut IRD Chu N. H. A. auteur aut IRD Vu C. T. auteur aut IRD Boettcher L. auteur aut IRD Dang T. H. N. auteur aut IRD Niggemann J. auteur aut IRD Dittmar T. auteur aut IRD Tedetti Marc auteur aut IRD text journalArticle eng text/pdf born digital access Among pollutants released from shipping, black carbon (BC), also known as soot carbon, is of great interest due to its impacts on climate, air quality, human health and ecosystems. BC emitted from ships may enter marine waters and partially transfer to the seawater dissolved phase. In this study, we investigated the optical properties (absorbance and fluorescence) of dissolved organic matter (DOM) derived from BC particles (DOMBC) emitted by ships, which were compared to those of DOMBC of other origins (diesel-powered industrial machine, biomass burning, urban dust), and to terrestrial and marine DOM (DOMTER, DOMMAR). Ship and diesel DOMBC displayed higher ratios of fluorescence maximum intensity to dissolved organic carbon concentration (Fmax/DOC), higher specific UV absorbance at 254 nm (SUVA254), and lower fluorescence emission wavelengths than the other tested materials. The parallel factor analysis (PARAFAC)-derived fluorophores of the ship and diesel DOMBC exhibited significant correlations with the concentration of dissolved black carbon (DBC), determined using the benzenepolycarboxylic acid (BPCA) method. Based on these results, we propose the Combustion indeX (COX), to help detecting and tracking ship/fuel combustion pollutions in marine waters. specialized Black carbon Ship soot Dissolved organic matter Fluorescence Dissolved black carbon Humic substances 020 038 265 104432 [13 ] 2024 0304-4203 https://www.documentation.ird.fr/hor/fdi:010091151 10.1016/j.marchem.2024.104432 0304-4203 [F B010091151] https://www.documentation.ird.fr/hor/fdi:010091151 https://www.documentation.ird.fr/intranet/publi/2024-09/010091151.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2024-09-27 2025-11-06 fdi:010091151 fre