Dissolved organic carbon in the precipitation of Seoul, Korea: Implications for global wet depositional flux of fossil-fuel derived organic carbon

► We investigated the source and flux of DOC in precipitation of Seoul. ► Fossil fuel combustion was the dominant source. ► DOC originated predominantly from local emissions. ► The contribution by long-range transport from China was substantial. ► Global flux of wet depositional fossil-fuel DOC was estimated to be 36 ± 10 Tg C yr−1.