Occurrence and distribution of hydrocarbons in the surface microlayer and subsurface water from the urban coastal marine area off Marseilles, Northwestern Mediterranean Sea

► Distribution of AHs and PAHs from Marseilles coastal area, NW Mediterranean Sea. ► Enrichment factor of the SML (versus the SSW) reaching up to 1138 for particulate AHs. ► Marseilles coastal area was moderately contaminated from rather petrogenic sources. ► Rains increased hydrocarbon concentrations up to 11.5-fold in the dissolved phase.