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(Article of periodic en Anglais - 2013)

Document title

Dune field development, interactions and boundary conditions for crescentic and stellate megadunes of the Al Liwa Basin, the Empty Quarter

Authors(s) and Affiliation(s)

BISHOP M.A. (1 2 3) ;
(1) Planetary Science Inst., Tucson, ETATS-UNIS
(2) School of Earth and Environmental Sciences, Geology and Geophysics, Univ., Adelaide, AUSTRALIE
(3) Barbara Hardy Inst., Univ. of South Australia, Adelaide, AUSTRALIE

Abstract

Within the greater Ar Rub' al Khali (Empty Quarter) sand sea lies an internal depocentre, the Al Liwa Basin, which comprises a variety of mega-scale dune types. Crescentic dunes dominant the north of the basin while megadunes of stellate or star form are a major landform of the south-eastern reaches. Their development into dune fields is determined by the style and rate of dune-dune interactions, the boundary conditions imposed by a multi-modal wind regime, fluctuating groundwater levels, and sediment availability under an assortment of climatic conditions throughout the Quaternary. As a result, dune field patterns are a collective response to these perturbations in space, time and environment. The R-statistic is a collective measure of these responses, and is a metric capable of identifying the degree of pattern maturity or self-organization of the aeolian system, and the pathways from which patterns evolve. Synergetic patterns are emblematic of this vast dunescape, whereby transitional geographic, morphologic, dimensional and environmental modifications exist between the mega-crescentic and mega-stellate dunes of the Empty Quarter

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, no2 [pp. 183-191]

Bibliographic references : 1 p.

Collation : 6 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3318

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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