Slope and climate variability control of erosion in the Andes of central Chile

S. Carretier, V. Regard, R. Vassallo, G. Aguilar, J. Martinod, R. Riquelme, E. Pepin, R. Charrier, G. Hérail, M. Farías, J. L. Guyot, G. Vargas, C. Lagane

Resultado de la investigación: Article

61 Citas (Scopus)

Resumen

Climate and topography control millennial-scale mountain erosion, but their relative impacts remain matters of debate. Conflicting results may be explained by the influence of the erosion threshold and daily variability of runoff on long-term erosion. However, there is a lack of data documenting these erosion factors. Here we report suspended-load measurements, derived decennial erosion rates, and 10Be-derived millennial erosion rates along an exceptional climatic gradient in the Andes of central Chile. Both erosion rates (decennial and millenial) follow the same latitudinal trend, and peak where the climate is temperate (mean runoff ~500 mm yr-1). Both decennial and millennial erosion rates increase nonlinearly with slope toward a threshold of ~0.55 m/m. The comparison of these erosion rates shows that the contribution of rare and strong erosive events to millennial erosion increases from 0% in the humid zone to more than 90% in the arid zone. Our data confirm the primary role of slope as erosion control even under contrasting climates and support the view that the influence of runoff variability on millennial erosion rates increases with aridity.

Idioma originalEnglish
Páginas (desde-hasta)195-198
Número de páginas4
PublicaciónGeology
Volumen41
N.º2
DOI
EstadoPublished - feb 2013

Huella dactilar

erosion rate
erosion
climate
runoff
suspended load
erosion control
aridity
topography
mountain

ASJC Scopus subject areas

  • Geology

Citar esto

Carretier, S., Regard, V., Vassallo, R., Aguilar, G., Martinod, J., Riquelme, R., ... Lagane, C. (2013). Slope and climate variability control of erosion in the Andes of central Chile. Geology, 41(2), 195-198. https://doi.org/10.1130/G33735.1
Carretier, S. ; Regard, V. ; Vassallo, R. ; Aguilar, G. ; Martinod, J. ; Riquelme, R. ; Pepin, E. ; Charrier, R. ; Hérail, G. ; Farías, M. ; Guyot, J. L. ; Vargas, G. ; Lagane, C. / Slope and climate variability control of erosion in the Andes of central Chile. En: Geology. 2013 ; Vol. 41, N.º 2. pp. 195-198.
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abstract = "Climate and topography control millennial-scale mountain erosion, but their relative impacts remain matters of debate. Conflicting results may be explained by the influence of the erosion threshold and daily variability of runoff on long-term erosion. However, there is a lack of data documenting these erosion factors. Here we report suspended-load measurements, derived decennial erosion rates, and 10Be-derived millennial erosion rates along an exceptional climatic gradient in the Andes of central Chile. Both erosion rates (decennial and millenial) follow the same latitudinal trend, and peak where the climate is temperate (mean runoff ~500 mm yr-1). Both decennial and millennial erosion rates increase nonlinearly with slope toward a threshold of ~0.55 m/m. The comparison of these erosion rates shows that the contribution of rare and strong erosive events to millennial erosion increases from 0{\%} in the humid zone to more than 90{\%} in the arid zone. Our data confirm the primary role of slope as erosion control even under contrasting climates and support the view that the influence of runoff variability on millennial erosion rates increases with aridity.",
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Carretier, S, Regard, V, Vassallo, R, Aguilar, G, Martinod, J, Riquelme, R, Pepin, E, Charrier, R, Hérail, G, Farías, M, Guyot, JL, Vargas, G & Lagane, C 2013, 'Slope and climate variability control of erosion in the Andes of central Chile', Geology, vol. 41, n.º 2, pp. 195-198. https://doi.org/10.1130/G33735.1

Slope and climate variability control of erosion in the Andes of central Chile. / Carretier, S.; Regard, V.; Vassallo, R.; Aguilar, G.; Martinod, J.; Riquelme, R.; Pepin, E.; Charrier, R.; Hérail, G.; Farías, M.; Guyot, J. L.; Vargas, G.; Lagane, C.

En: Geology, Vol. 41, N.º 2, 02.2013, p. 195-198.

Resultado de la investigación: Article

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T1 - Slope and climate variability control of erosion in the Andes of central Chile

AU - Carretier, S.

AU - Regard, V.

AU - Vassallo, R.

AU - Aguilar, G.

AU - Martinod, J.

AU - Riquelme, R.

AU - Pepin, E.

AU - Charrier, R.

AU - Hérail, G.

AU - Farías, M.

AU - Guyot, J. L.

AU - Vargas, G.

AU - Lagane, C.

PY - 2013/2

Y1 - 2013/2

N2 - Climate and topography control millennial-scale mountain erosion, but their relative impacts remain matters of debate. Conflicting results may be explained by the influence of the erosion threshold and daily variability of runoff on long-term erosion. However, there is a lack of data documenting these erosion factors. Here we report suspended-load measurements, derived decennial erosion rates, and 10Be-derived millennial erosion rates along an exceptional climatic gradient in the Andes of central Chile. Both erosion rates (decennial and millenial) follow the same latitudinal trend, and peak where the climate is temperate (mean runoff ~500 mm yr-1). Both decennial and millennial erosion rates increase nonlinearly with slope toward a threshold of ~0.55 m/m. The comparison of these erosion rates shows that the contribution of rare and strong erosive events to millennial erosion increases from 0% in the humid zone to more than 90% in the arid zone. Our data confirm the primary role of slope as erosion control even under contrasting climates and support the view that the influence of runoff variability on millennial erosion rates increases with aridity.

AB - Climate and topography control millennial-scale mountain erosion, but their relative impacts remain matters of debate. Conflicting results may be explained by the influence of the erosion threshold and daily variability of runoff on long-term erosion. However, there is a lack of data documenting these erosion factors. Here we report suspended-load measurements, derived decennial erosion rates, and 10Be-derived millennial erosion rates along an exceptional climatic gradient in the Andes of central Chile. Both erosion rates (decennial and millenial) follow the same latitudinal trend, and peak where the climate is temperate (mean runoff ~500 mm yr-1). Both decennial and millennial erosion rates increase nonlinearly with slope toward a threshold of ~0.55 m/m. The comparison of these erosion rates shows that the contribution of rare and strong erosive events to millennial erosion increases from 0% in the humid zone to more than 90% in the arid zone. Our data confirm the primary role of slope as erosion control even under contrasting climates and support the view that the influence of runoff variability on millennial erosion rates increases with aridity.

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Carretier S, Regard V, Vassallo R, Aguilar G, Martinod J, Riquelme R y otros. Slope and climate variability control of erosion in the Andes of central Chile. Geology. 2013 feb;41(2):195-198. https://doi.org/10.1130/G33735.1