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dc.contributor.author
Scheingross, J. S.
dc.contributor.author
Repasch, M. N.
dc.contributor.author
Hovius, N.
dc.contributor.author
Sachse, D.
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Lupker, M.
dc.contributor.author
Fuchs, M.
dc.contributor.author
Halevy, I.
dc.contributor.author
Gröcke, D. R.
dc.contributor.author
Golombek, N. Y.
dc.contributor.author
Haghipour, N.
dc.contributor.author
Eglinton, T.I.
dc.contributor.author
Orfeo, Oscar
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dc.contributor.author
Schleicher, A. M.
dc.date.available
2023-01-02T17:50:43Z
dc.date.issued
2021-05
dc.identifier.citation
Scheingross, J. S.; Repasch, M. N.; Hovius, N.; Sachse, D.; Lupker, M.; et al.; The fate of fluvially-deposited organic carbon during transient floodplain storage; Elsevier Science; Earth and Planetary Science Letters; 561; 5-2021; 1-13
dc.identifier.issn
0012-821X
dc.identifier.uri
http://hdl.handle.net/11336/182943
dc.description.abstract
CO2 release from particulate organic carbon (POC) oxidation during fluvial transit can influence climate over a range of timescales. Identifying the mechanistic controls on such carbon fluxes requires determining where POC oxidation occurs in river systems. While field data show POC oxidation and replacement moving downstream in lowland rivers, flume studies show that oxidation during active fluvial transport is limited. This suggests that most fluvial POC oxidation occurs during transient floodplain storage, but this idea has yet to be tested. Here, we isolate the influence of floodplain storage time on POC oxidation by exploiting a chronosequence of floodplain deposits above the modern groundwater table in the Rio Bermejo, Argentina. Measurements from 15 floodplain cores with depositional ages from 1 y to 20 ky show a progressive POC concentration decrease and 13C-enrichment with increasing time spent in floodplain storage. These results from the Rio Bermejo indicate that over 80% of fluvially-deposited POC can be oxidized over millennial timescales in aerated floodplains. Furthermore, POC in the oldest floodplain cores is more 14C-enriched than expected based on the independently-dated floodplain ages, indicating that a portion of this oxidized POC is replaced by autochthonous POC produced primarily by floodplain vegetation. We suggest floodplain storage timescales control the extent of oxidation of fluvially-deposited POC, and may play a prominent role in determining if rivers are significant atmospheric CO2 sources.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CARBON CYCLE
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FLOODPLAINS
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ORGANIC CARBON
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OXIDATION
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RIVERS
dc.subject.classification
Oceanografía, Hidrología, Recursos Hídricos
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
The fate of fluvially-deposited organic carbon during transient floodplain storage
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-08-19T18:17:49Z
dc.journal.volume
561
dc.journal.pagination
1-13
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Scheingross, J. S.. German Research Centre for Geosciences; Alemania
dc.description.fil
Fil: Repasch, M. N.. German Research Centre for Geosciences; Alemania. Universitat Potsdam; Alemania
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Fil: Hovius, N.. Universitat Potsdam; Alemania. German Research Centre for Geosciences; Alemania
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Fil: Sachse, D.. German Research Centre for Geosciences; Alemania
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Fil: Lupker, M.. No especifíca;
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Fil: Fuchs, M.. No especifíca;
dc.description.fil
Fil: Halevy, I.. Weizmann Institute Of Science Israel; Israel
dc.description.fil
Fil: Gröcke, D. R.. University of Durham; Reino Unido
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Fil: Golombek, N. Y.. German Research Centre for Geosciences; Alemania. Dalhousie University Halifax; Canadá. Universitat Potsdam; Alemania
dc.description.fil
Fil: Haghipour, N.. No especifíca;
dc.description.fil
Fil: Eglinton, T.I.. No especifíca;
dc.description.fil
Fil: Orfeo, Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina
dc.description.fil
Fil: Schleicher, A. M.. German Research Centre for Geosciences; Alemania
dc.journal.title
Earth and Planetary Science Letters
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.epsl.2021.116822
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