Guigue C. auteur aut IRD Tedetti Marc auteur aut IRD Ferretto N. auteur aut IRD Garcia N. auteur aut IRD Mejanelle L. auteur aut IRD Goutx M. auteur aut IRD text journalArticle eng text/pdf born digital access Dissolved aliphatic hydrocarbons (AHs) and polycyclic aromatic hydrocarbons (PAHs) were analysed from surface water collected in continental, harbour and off-shore marine sites from Marseilles coastal area (Northwestern Mediterranean Sea) from February 2011 to February 2012. AH and PAH concentrations were in the range of 0.04-0.53 mu g 1(-1) and 8.1-405 ng 1(-1), respectively. They both displayed seasonal and spatial variations in their concentrations and molecular composition. The lowest AH concentrations were found in summer and the highest PAH concentrations in winter. Both natural and anthropogenic (pyrogenic and petrogenic) hydrocarbon sources were identified. In winter, concentrations and composition patterns highlighted an increase in the signature of unburned and combusted fossil fuels, while they suggested an enhancement of weathering processes in summer months. Hydrocarbon inputs to the dissolved phase seemed to originate mainly from the atmosphere and the Rhone River. Hydrocarbon additional sources were identified only at the harbour site, emphasising the intense shipping traffic and industrial activities occurring in one of the most important Mediterranean harbours. This study underscores the strong dynamics of dissolved hydrocarbons and the uncoupling of the sources, transport and removing processes affecting AHs and PAHs. It also demonstrates the pertinence of taking this dynamics into account for the budget assessments of organic pollutants in coastal environments. specialized Aliphatic hydrocarbons Polycyclic aromatic hydrocarbons Dissolved contaminants Northwestern Mediterranean sea Marseilles coastal area Rhone River FRANCE MEDITERRANNEE 038 466 650-662 2014 0048-9697 https://www.documentation.ird.fr/hor/fdi:010061760 10.1016/j.scitotenv.2013.07.082 0048-9697 [F B010061760] https://www.documentation.ird.fr/hor/fdi:010061760 https://www.documentation.ird.fr/intranet/publi/2014/03/010061760.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2014-04-02 2017-08-23 fdi:010061760 fre