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Landscape response to late Pleistocene climate change in NW Argentina: sediment flux modulated by basin geometry and connectivity

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Landscape response to late Pleistocene climate change in NW Argentina : sediment flux modulated by basin geometry and connectivity. / Schildgen, Taylor F.; Robinson, Ruth A. J.; Savi, Sara; Phillips, William M.; Spencer, Joel Q. G.; Bookhagen, Bodo; Scherler, Dirk; Tofelde, Stefanie; Alonso, Ricardo N.; Kubik, Peter W.; Binnie, Steven A.; Strecker, Manfred R.

In: Journal of Geophysical Research - Earth Surface, Vol. 121, No. 2, 02.2016, p. 392-414.

Research output: Contribution to journalArticlepeer-review

Harvard

Schildgen, TF, Robinson, RAJ, Savi, S, Phillips, WM, Spencer, JQG, Bookhagen, B, Scherler, D, Tofelde, S, Alonso, RN, Kubik, PW, Binnie, SA & Strecker, MR 2016, 'Landscape response to late Pleistocene climate change in NW Argentina: sediment flux modulated by basin geometry and connectivity', Journal of Geophysical Research - Earth Surface, vol. 121, no. 2, pp. 392-414. https://doi.org/10.1002/2015JF003607

APA

Schildgen, T. F., Robinson, R. A. J., Savi, S., Phillips, W. M., Spencer, J. Q. G., Bookhagen, B., Scherler, D., Tofelde, S., Alonso, R. N., Kubik, P. W., Binnie, S. A., & Strecker, M. R. (2016). Landscape response to late Pleistocene climate change in NW Argentina: sediment flux modulated by basin geometry and connectivity. Journal of Geophysical Research - Earth Surface, 121(2), 392-414. https://doi.org/10.1002/2015JF003607

Vancouver

Schildgen TF, Robinson RAJ, Savi S, Phillips WM, Spencer JQG, Bookhagen B et al. Landscape response to late Pleistocene climate change in NW Argentina: sediment flux modulated by basin geometry and connectivity. Journal of Geophysical Research - Earth Surface. 2016 Feb;121(2):392-414. https://doi.org/10.1002/2015JF003607

Author

Schildgen, Taylor F. ; Robinson, Ruth A. J. ; Savi, Sara ; Phillips, William M. ; Spencer, Joel Q. G. ; Bookhagen, Bodo ; Scherler, Dirk ; Tofelde, Stefanie ; Alonso, Ricardo N. ; Kubik, Peter W. ; Binnie, Steven A. ; Strecker, Manfred R. / Landscape response to late Pleistocene climate change in NW Argentina : sediment flux modulated by basin geometry and connectivity. In: Journal of Geophysical Research - Earth Surface. 2016 ; Vol. 121, No. 2. pp. 392-414.

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@article{72e291af10814b1e8dc13cf33f05433f,
title = "Landscape response to late Pleistocene climate change in NW Argentina: sediment flux modulated by basin geometry and connectivity",
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.",
keywords = "Berylium-10, Fluvial terraces, Humahuaca Basin, Landscape connectivity, Optically stimulated luminescence, South American Monsoon System",
author = "Schildgen, {Taylor F.} and Robinson, {Ruth A. J.} and Sara Savi and Phillips, {William M.} and Spencer, {Joel Q. G.} and Bodo Bookhagen and Dirk Scherler and Stefanie Tofelde and Alonso, {Ricardo N.} and Kubik, {Peter W.} and Binnie, {Steven A.} and Strecker, {Manfred R.}",
note = "This work was funded by the Emmy Noether Programme of the Deutsche Forschungsgemeinschaft (DFG) grant SCHI 1241/1-1 awarded to T. Schildgen, awards from the Petroleum Research Fund and the Carnegie Trust to R. Robinson, and a DFG Leibniz Award to M. Strecker (DFG 373/18-1). ",
year = "2016",
month = feb,
doi = "10.1002/2015JF003607",
language = "English",
volume = "121",
pages = "392--414",
journal = "Journal of Geophysical Research - Earth Surface",
issn = "2169-9011",
publisher = "John Wiley & Sons, Ltd.",
number = "2",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Landscape response to late Pleistocene climate change in NW Argentina

T2 - sediment flux modulated by basin geometry and connectivity

AU - Schildgen, Taylor F.

AU - Robinson, Ruth A. J.

AU - Savi, Sara

AU - Phillips, William M.

AU - Spencer, Joel Q. G.

AU - Bookhagen, Bodo

AU - Scherler, Dirk

AU - Tofelde, Stefanie

AU - Alonso, Ricardo N.

AU - Kubik, Peter W.

AU - Binnie, Steven A.

AU - Strecker, Manfred R.

N1 - This work was funded by the Emmy Noether Programme of the Deutsche Forschungsgemeinschaft (DFG) grant SCHI 1241/1-1 awarded to T. Schildgen, awards from the Petroleum Research Fund and the Carnegie Trust to R. Robinson, and a DFG Leibniz Award to M. Strecker (DFG 373/18-1).

PY - 2016/2

Y1 - 2016/2

N2 - 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.

AB - 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.

KW - Berylium-10

KW - Fluvial terraces

KW - Humahuaca Basin

KW - Landscape connectivity

KW - Optically stimulated luminescence

KW - South American Monsoon System

UR - http://onlinelibrary.wiley.com/doi/10.1002/2015JF003607/abstract#footer-support-info

U2 - 10.1002/2015JF003607

DO - 10.1002/2015JF003607

M3 - Article

AN - SCOPUS:84959450403

VL - 121

SP - 392

EP - 414

JO - Journal of Geophysical Research - Earth Surface

JF - Journal of Geophysical Research - Earth Surface

SN - 2169-9011

IS - 2

ER -

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