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(Article of periodic en Anglais - 2011)

Document title

The sensitivity of hillslope bedrock erosion to precipitation

Authors(s) and Affiliation(s)

OWEN J.J. (1) ; AMUNDSON R. (1) ; DIETRICH W.E. (2) ; NISHIIZUMI K. (3) ; SUTTER B. (4) ; CHONG G. (5) ;
(1) Department of Environmental Science, Policy & Management, University of California, Berkeley, ETATS-UNIS
(2) Department of Earth and Planetary Science, University of California, Berkeley, ETATS-UNIS
(3) Space Science Laboratory, University of California, Berkeley, ETATS-UNIS
(4) NASA, Johnson Space Center, Houston, ETATS-UNIS
(5) Departamento de Ciencias Geológicas, Unversidad Católica del Norte, Antofagasta, CHILI

Abstract

To isolate the effects of precipitation and boundary condition, the AA. measured rates of soil production from bedrock and described soils on hillslopes along a semi-arid to hyperarid precipitation gradient in northern Chile. In each climate zone, hillslopes with contrasting boundary conditions (actively incising channels versus noneroding landforms) were studied. Channel incision rates, which ultimately drive hillslope erosion, varied with precipitation rather than tectonic setting throughout the study area. The biotic-abiotic threshold also marks the precipitation rate below which bedrock erosion rates are no longer a function of soil thickness. This work shows that hillslope processes become sensitive to precipitation as life disappears and the ability of the landscape to respond to tectonics decreases

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2011, vol. 36, no1 [pp. 117-135]

Bibliographic references : 3 p.

Collation : 12 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2083

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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