The impact of extreme El Niño events on modern sediment transport along the western Peruvian Andes (1968–2012)

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dc.contributor.authorMorera Julca, Sergio Byron
dc.contributor.authorCondom, Thomas
dc.contributor.authorCrave, Alain
dc.contributor.authorSteer, Philippe
dc.contributor.authorGuyot, Jean L.
dc.coverage.spatialAndes
dc.coverage.spatialPerú
dc.date.accessioned2018-08-02T10:59:11Z
dc.date.available2018-08-02T10:59:11Z
dc.date.issued2017-09-25
dc.description.abstractClimate change is considered as one of the main factors controlling sediment fluxes in mountain belts. However, the effect of El Niño, which represents the primary cause of inter-annual climate variability in the South Pacific, on river erosion and sediment transport in the Western Andes remains unclear. Using an unpublished dataset of Suspended Sediment Yield (SSY) in Peru (1968–2012), we show that the annual SSY increases by 3–60 times during Extreme El Niño Events (EENE) compared to normal years. During EENE, 82% to 97% of the annual SSY occurs from January to April. We explain this effect by a sharp increase in river water discharge due to high precipitation rates and transport capacity during EENE. Indeed, sediments accumulate in the mountain and piedmont areas during dry normal years, and are then rapidly mobilized during EENE years. The effect of EENE on SSY depends on the topography, as it is maximum for catchments located in the North of Peru (3–7°S), exhibiting a concave up hypsometric curve, and minimum for catchments in the South (7–18°S), with a concave down hypsometric curve. These findings highlight how the sediment transport of different topographies can respond in very different ways to large climate variability.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationMorera, S. B., Condom, T., Crave, A., Steer, P., & Guyot, J. L. (2017). The impact of extreme El Niño events on modern sediment transport along the western Peruvian Andes (1968–2012).==$Scientific Reports, 7$==(11947). https://doi.org/10.1038/s41598-017-12220-xes_ES
dc.identifier.doihttps://doi.org/10.1038/s41598-017-12220-xes_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalScientific Reportses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2175
dc.language.isoenges_ES
dc.publisherNature Researches_ES
dc.relation.ispartofurn:issn:0028-0836
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licences/by/4.0/es_ES
dc.subjectHydrologyes_ES
dc.subjectNatural hazardses_ES
dc.subjectSedimentologyes_ES
dc.subjectSeismologyes_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.00es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.09es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.11es_ES
dc.titleThe impact of extreme El Niño events on modern sediment transport along the western Peruvian Andes (1968–2012)es_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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