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dc.contributor.authorCoppola, Alysha I.  Concept link
dc.contributor.authorWiedemeier, Daniel B.  Concept link
dc.contributor.authorGaly, Valier  Concept link
dc.contributor.authorHaghipour, Negar  Concept link
dc.contributor.authorHanke, Ulrich  Concept link
dc.contributor.authorNascimento, Gabriela S.  Concept link
dc.contributor.authorUsman, Muhammed  Concept link
dc.contributor.authorBlattmann, Thomas M.  Concept link
dc.contributor.authorReisser, Moritz  Concept link
dc.contributor.authorFreymond, Chantal V.  Concept link
dc.contributor.authorZhao, Meixun  Concept link
dc.contributor.authorVoss, Britta M.  Concept link
dc.contributor.authorWacker, Lukas  Concept link
dc.contributor.authorSchefuß, Enno  Concept link
dc.contributor.authorPeucker-Ehrenbrink, Bernhard  Concept link
dc.contributor.authorAbiven, Samuel  Concept link
dc.contributor.authorSchmidt, Michael W. I.  Concept link
dc.contributor.authorEglinton, Timothy I.  Concept link
dc.date.accessioned2018-10-30T16:51:44Z
dc.date.available2018-10-30T16:51:44Z
dc.date.issued2018-05
dc.identifier.urihttps://hdl.handle.net/1912/10670
dc.descriptionAuthor Posting. © The Author(s), 2018. This is the author's version of the work. It is posted here under a nonexclusive, irrevocable, paid-up, worldwide license granted to WHOI. It is made available for personal use, not for redistribution. The definitive version was published in Nature Geoscience 11 (2018): 584-588, doi:10.1038/s41561-018-0159-8.en_US
dc.description.abstractWildfires and incomplete combustion of fossil fuel produce large amounts of black carbon. Black carbon production and transport are essential components of the carbon cycle. Constraining estimates of black carbon exported from land to ocean is critical, given ongoing changes in land use and climate, which affect fire occurrence and black carbon dynamics. Here, we present an inventory of the concentration and radiocarbon content (∆14C) of particulate black carbon for 18 rivers around the globe. We find that particulate black carbon accounts for about 15.8 ± 0.9% of river particulate organic carbon, and that fluxes of particulate black carbon co-vary with river-suspended sediment, indicating that particulate black carbon export is primarily controlled by erosion. River particulate black carbon is not exclusively from modern sources but is also aged in intermediate terrestrial carbon pools in several high-latitude rivers, with ages of up to 17,000 14C years. The flux-weighted 14C average age of particulate black carbon exported to oceans is 3,700 ± 400 14C years. We estimate that the annual global flux of particulate black carbon to the ocean is 0.017 to 0.037 Pg, accounting for 4 to 32% of the annually produced black carbon. When buried in marine sediments, particulate black carbon is sequestered to form a long-term sink for CO2.en_US
dc.description.sponsorshipA.C. acknowledges financial support from the University of Zurich Forschungskredit Fellowship and the University of Zurich (grant No. STWF-18-026). M.R., S.A. and M.S. acknowledge support from the University Research Priority Projection Global Change and Biodiversity (URPP-GCB). M.Z. acknowledges support from the National Natural Science Foundation of China (No. 41521064). T.E. acknowledges support from the Swiss National Science Foundation (“CAPS-LOCK” and “CAPS-LOCK2” #200021_140850). V.G. acknowledges financial support from an Independent Study Award from the Woods Hole Oceanographic Institution.en_US
dc.language.isoen_USen_US
dc.relation.urihttps://doi.org/10.1038/s41561-018-0159-8
dc.titleGlobal-scale evidence for the refractory nature of riverine black carbonen_US
dc.typePreprinten_US


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