Black carbon in marine particulate organic carbon: Inputs and cycling of highly recalcitrant organic carbon in the Gulf of Maine
作者： D. Xanat Flores-Cervantes , Desiree L. Plata , John K. MacFarlane , Christopher M. Reddy , Philip M. Gschwend
DOI: 10.1016/J.MARCHEM.2009.01.012
关键词:
摘要: article To increase our understanding of the roles black carbon (BC), a highly sorptive and recalcitrant material, we measuredBCconcentrationsand fluxesinmarineparticulateorganiccarbon(POC)outofthewatercolumninthe GulfofMaine(GoM),arepresentativecoastalareadownwindofimportantBCsourcesoftheNortheasternUnited States.Concentrationsranged fromb0.1 to 16 μg/L in spring late summer, typically contributing between 1and20%of thePOC.Water-columnexport fluxeswerenear10gBC/m 2 ∙yr.Theseobservationssuggestthat(a)up 50% "molecularly uncharacterized" POC this region's seawater is combustion-derived BC, (b) "bioavailabilities" hydrophobic pollutants like polycyclic aromatic hydrocarbons (PAHs) would be influenced substantially by sorption BC. The observed BC spatial distributions implythat large part was carried offshore wind that much it accumulated coastal sediments. On global scale, these results suggest GoM other areas with similar loadings accumulate significant amounts organic remineralizes on geological time scales world's oceans.
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