Fluvial organic carbon composition regulated by seasonal variability in lowland river migration and water discharge

Golombek, Nina Y.; Scheingross, Joel S.; Repasch, Marisa N.; Hovius, Niels; Menges, Johanna; Sachse, Dirk; Lupker, Maarten; Eglinton, Timothy I.; Haghipour, Negar; Poulson, Simon R.; Gröcke, Darren R.; Latosinski, Francisco Guillermo; Szupiany, Ricardo Nicolas

doi:10.1029/2021GL093416

Artículo

Fluvial organic carbon composition regulated by seasonal variability in lowland river migration and water discharge

Golombek, Nina Y.; Scheingross, Joel S.; Repasch, Marisa N.; Hovius, Niels; Menges, Johanna; Sachse, Dirk; Lupker, Maarten; Eglinton, Timothy I.; Haghipour, Negar; Poulson, Simon R.; Gröcke, Darren R.; Latosinski, Francisco Guillermo Icon

; Szupiany, Ricardo Nicolas Icon

Fecha de publicación: 12/2021

Editorial: American Geophysical Union

Revista: Geophysical Research Letters

ISSN: 0094-8276

Idioma: Inglés

Tipo de recurso: Artículo publicado

Clasificación temática:

Geociencias multidisciplinaria

Resumen

Identifying drivers of seasonal variations in fluvial particulate organic carbon (POC) composition can aid sediment provenance and biogeochemical cycling studies. We evaluate seasonal changes in POC composition in the Río Bermejo, Argentina, a lowland river running ∼1,270 km without tributaries. Weekly POC concentration and isotopic composition from 2016 to 2018 show that during the wet season, increased lateral channel migration generates an influx of 13C-enriched and 14C-enriched floodplain-sourced material, overprinting the 13C-depleted and 14C-depleted headwater signature that is observed during the dry season. These findings demonstrate how channel morphodynamics can drive variability of POC composition in lowland rivers, and may modulate the composition of POC preserved in sedimentary archives.

Palabras clave: CARBON CYCLE , LOWLAND RIVER , MEANDER MIGRATION , ORGANIC CARBON , SEASONALITY

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Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution 2.5 Unported (CC BY 2.5)

Identificadores

URI: http://hdl.handle.net/11336/164934

URL: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021GL093416

DOI: http://dx.doi.org/10.1029/2021GL093416

Colecciones

Articulos(CCT - SANTA FE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE

Citación

Golombek, Nina Y.; Scheingross, Joel S.; Repasch, Marisa N.; Hovius, Niels; Menges, Johanna; et al.; Fluvial organic carbon composition regulated by seasonal variability in lowland river migration and water discharge; American Geophysical Union; Geophysical Research Letters; 48; 24; 12-2021; 1-11

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