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(Article of periodic en Anglais - 2013)

Document title

Rock damage and regolith transport by frost : an example of climate modulation of the geomorphology of the critical zone

Authors(s) and Affiliation(s)

ANDERSON R.S. (1 2) ; ANDERSON S.P. (1 3) ; TUCKER G.E. (2 4) ;
(1) Inst. of Arctic and Alpine Research, Univ. of Colorado, Boulder, ETATS-UNIS
(2) Dep. of Geological Sciences, Univ. Colorado, Boulder, ETATS-UNIS
(3) Dept. of Geography, Univ. of Colorado, Boulder, ETATS-UNIS
(4) Cooperative Inst. for Research in Environmental Sciences (CIRES), Univ. Colorado, Boulder, ETATS-UNIS

Abstract

Here the AA. craft process-specific algorithms that capture climate control of hillslope evolution in order to elucidate the legacy of past climate on present critical zone architecture and topography. Models of hillslope evolution traditionally comprise rock detachment into the mobile layer, mobile regolith transport, and a channel incision or aggradation boundary condition. They extend this system into the deep critical zone by considering a weathering damage zone below the mobile regolith in which rock strength is diminished. The AA. first discuss generic damage profiles in which appropriate length and damage scales govern profile shapes, and examine their dependence upon exhumation rate. They then introduce climate control through the example of rock damage by frost-generated crack growth. Finally the AA. link the frost cracking damage model, a mobile regolith production rule in which rock entrainment is conditioned by the damage state of the rock, and a frost creep transport model, to examine the evolution of an interfluve under oscillating climate

Source

Article of periodic

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

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

Millesime : 2013, vol. 38, no3 [pp. 299-316]

Bibliographic references : 2 p.

Collation : 12 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3330

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
Refdoc record number (ud4) : 27865145 : Permanent link - XML version
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