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dc.contributor.author
Schildgen, Taylor F
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Robinson, Ruth A. J.
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Savi, Sara
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Phillips, William M.
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Spencer, Joel Q. G.
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Bookhagen, Bodo
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Scherler, Dirk
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Tofelde, Stefanie
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Alonso, Ricardo Narciso
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Kubik, Peter W.
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Binnie, Steven A.
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Strecker, Manfred R.
dc.date.available
2017-06-05T18:38:52Z
dc.date.issued
2016-02
dc.identifier.citation
Schildgen, Taylor F; Robinson, Ruth A. J.; Savi, Sara; Phillips, William M.; Spencer, Joel Q. G.; et al.; Landscape response to late Pleistocene climate change in NW Argentina: Sediment flux modulated by basin geometry and connectivity; American Geophysical Union; Journal of Geophysical Research F: Earth Surface; 121; 2; 2-2016; 392-414
dc.identifier.issn
2169-9003
dc.identifier.uri
http://hdl.handle.net/11336/17504
dc.description.abstract
Fluvial fill terraces preserve sedimentary archives of landscape responses to climate change, typically over millennial timescales. In the Humahuaca Basin of NW Argentina (Eastern Cordillera, southern Central Andes), our 29 new optically stimulated luminescence ages of late Pleistocene fill terrace sediments demonstrate that the timing of past river aggradation occurred over different intervals on the western and eastern sides of the valley, despite their similar bedrock lithology, mean slopes, and precipitation. In the west, aggradation coincided with periods of increasing precipitation, while in the east, aggradation coincided with decreasing precipitation or more variable conditions. Erosion rates and grain size dependencies in our cosmogenic 10Be analyses of modern and fill terrace sediments reveal an increased importance of landsliding compared to today on the west side during aggradation, but of similar importance during aggradation on the east side. Differences in the timing of aggradation and the 10Be data likely result from differences in valley geometry, which causes sediment to be temporarily stored in perched basins on the east side. It appears as if periods of increasing precipitation triggered landslides throughout the region, which induced aggradation in the west, but blockage of the narrow bedrock gorges downstream from the perched basins in the east. As such, basin geometry and fluvial connectivity appear to strongly influence the timing of sediment movement through the system. For larger basins that integrate subbasins with differing geometries or degrees of connectivity (like Humahuaca), sedimentary responses to climate forcing are likely attenuated.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Geophysical Union
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Berylium-10
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Fluvial Terraces
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Humahuaca Basin
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Landscape Connectivity
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Optically Stimulated Luminescence
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South American Monsoon System
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Geociencias multidisciplinaria
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Landscape response to late Pleistocene climate change in NW Argentina: Sediment flux modulated by basin geometry and connectivity
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-06-05T14:47:49Z
dc.journal.volume
121
dc.journal.number
2
dc.journal.pagination
392-414
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Schildgen, Taylor F. German Research Centre For Geosciences; Alemania. Universitat Potsdam; Alemania
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Fil: Robinson, Ruth A. J.. University Of St Andrews; Reino Unido
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Fil: Savi, Sara. Universitat Potsdam; Alemania
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Fil: Phillips, William M.. University Of Idaho; Estados Unidos
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Fil: Spencer, Joel Q. G.. Kansas State University; Estados Unidos
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Fil: Bookhagen, Bodo. Universitat Potsdam; Alemania
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Fil: Scherler, Dirk. Freie Universitat Berlin; Alemania. German Research Centre For Geosciences; Alemania
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Fil: Tofelde, Stefanie. Universitat Potsdam; Alemania
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Fil: Alonso, Ricardo Narciso. Universidad Nacional de Salta; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
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Fil: Kubik, Peter W.. Eidgenossische Technische Hochschule Zurich; Suiza
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Fil: Binnie, Steven A.. Universitat Zu Köln; Alemania
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Fil: Strecker, Manfred R.. Universitat Potsdam; Alemania
dc.journal.title
Journal of Geophysical Research F: Earth Surface
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.1002/2015JF003607
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info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/2015JF003607/abstract
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