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dc.contributor.author
Coppola, Alysha I.
dc.contributor.author
Seidel, Michael
dc.contributor.author
Ward, Nicholas D.
dc.contributor.author
Viviroli, Daniel
dc.contributor.author
Nascimento, Gabriela S.
dc.contributor.author
Haghipour, Negar
dc.contributor.author
Revels, Brandi N.
dc.contributor.author
Abiven, Samuel
dc.contributor.author
Jones, Matthew W.
dc.contributor.author
Richey, Jeffrey E.
dc.contributor.author
Eglinton, Timothy I.
dc.contributor.author
Dittmar, Thorsten
dc.contributor.author
Schmidt, Michael W.I.
dc.date.accessioned
2019-10-08T07:34:07Z
dc.date.available
2019-09-14T02:42:50Z
dc.date.available
2019-09-17T11:44:36Z
dc.date.available
2019-10-08T07:34:07Z
dc.date.issued
2019
dc.identifier.other
10.1038/s41467-019-11543-9
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/364022
dc.identifier.doi
10.3929/ethz-b-000364022
dc.description.abstract
Riverine dissolved organic carbon (DOC) contains charcoal byproducts, termed black carbon (BC). To determine the significance of BC as a sink of atmospheric CO2 and reconcile budgets, the sources and fate of this large, slow-cycling and elusive carbon pool must be constrained. The Amazon River is a significant part of global BC cycling because it exports an order of magnitude more DOC, and thus dissolved BC (DBC), than any other river. We report spatially resolved DBC quantity and radiocarbon (Δ14C) measurements, paired with molecular-level characterization of dissolved organic matter from the Amazon River and tributaries during low discharge. The proportion of BC-like polycyclic aromatic structures decreases downstream, but marked spatial variability in abundance and Δ14C values of DBC molecular markers imply dynamic sources and cycling in a manner that is incongruent with bulk DOC. We estimate a flux from the Amazon River of 1.9–2.7 Tg DBC yr−1 that is composed of predominately young DBC, suggesting that loss processes of modern DBC are important.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Nature Publishing Group
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Marked isotopic variability within and between the Amazon River and marine dissolved black carbon pools
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Nature Communications
ethz.journal.volume
10
en_US
ethz.pages.start
4018
en_US
ethz.size
8 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
London
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03868 - Eglinton, Timothy I. / Eglinton, Timothy I.
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03868 - Eglinton, Timothy I. / Eglinton, Timothy I.
ethz.date.deposited
2019-09-14T02:43:38Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2019-09-17T11:44:57Z
ethz.rosetta.lastUpdated
2019-10-08T07:34:33Z
ethz.rosetta.versionExported
true
ethz.COinS
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