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dc.contributor.author
Savi, Sara
dc.contributor.author
Schildgen, Taylor F.
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Tofelde, Stefanie
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Wittmann, Hella
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Scherler, Dirk
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Mey, Jürgen
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Alonso, Ricardo Narciso
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Strecker, Manfred R.
dc.date.available
2018-08-15T17:55:51Z
dc.date.issued
2016-12
dc.identifier.citation
Savi, Sara; Schildgen, Taylor F.; Tofelde, Stefanie; Wittmann, Hella; Scherler, Dirk; et al.; Climatic controls on debris-flow activity and sediment aggradation: The Del Medio fan, NW Argentina; Wiley; Journal of Geophysical Research: Earth Surface; 121; 12; 12-2016; 2424-2445
dc.identifier.issn
2169-9003
dc.identifier.uri
http://hdl.handle.net/11336/55656
dc.description.abstract
In the Central Andes, several studies on alluvial terraces and valley fills have linked sediment aggradation to periods of enhanced sediment supply. However, debate continues over whether tectonic or climatic factors are most important in triggering the enhanced supply. The Del Medio catchment in the Humahuaca Basin (Eastern Cordillera, NW Argentina) is located within a transition zone between subhumid and arid climates and hosts the only active debris‐flow fan within this intermontane valley. By combining 10Be analyses of boulder and sediment samples within the Del Medio catchment, with regional morphometric measurements of nearby catchments, we identify the surface processes responsible for aggradation in the Del Medio fan and their likely triggers. We find that the fan surface has been shaped by debris flows and channel avulsions during the last 400 years. Among potential tectonic, climatic, and autogenic factors that might influence deposition, our analyses point to a combination of several favorable factors that drive aggradation. These are in particular the impact of occasional abundant rainfall on steep slopes in rock types prone to failure, located in a region characterized by relatively low rainfall amounts and limited transport capacity. These characteristics are primarily associated with the climatic transition zone between the humid foreland and the arid orogen interior, which creates an imbalance between sediment supply and sediment transfer. The conditions and processes that drive aggradation in the Del Medio catchment today may provide a modern analog for the conditions and processes that drove aggradation in other nearby tributaries in the past.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Alluvial-Fan Dynamics
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Central Andes
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Climatic Transition
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Cosmogenic Nuclides
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Landslides
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Surface Processes
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Meteorología y Ciencias Atmosféricas
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Climatic controls on debris-flow activity and sediment aggradation: The Del Medio fan, NW Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-08-15T14:20:30Z
dc.identifier.eissn
2169-9011
dc.journal.volume
121
dc.journal.number
12
dc.journal.pagination
2424-2445
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Hoboken
dc.description.fil
Fil: Savi, Sara. Universitat Potsdam; Alemania
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Fil: Schildgen, Taylor F.. Universitat Potsdam; Alemania. German Research Centre for Geosciences; Alemania
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Fil: Tofelde, Stefanie. Universitat Potsdam; Alemania
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Fil: Wittmann, Hella. German Research Centre for Geosciences; Alemania
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Fil: Scherler, Dirk. German Research Centre for Geosciences; Alemania. Freie Universität Berlin; Alemania
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Fil: Mey, Jürgen. Universitat Potsdam; Alemania
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Fil: Alonso, Ricardo Narciso. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Strecker, Manfred R.. Universitat Potsdam; Alemania
dc.journal.title
Journal of Geophysical Research: Earth Surface
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/2016JF003912
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2016JF003912
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