Le système régional d'action éolienne (SRAE) du bassin de l'Aral (Kazakhstan,Ouzbékistan et Turkménistan)The regional Aeolian action system of the Aral Basin |
| |
| Authors: | Monique Mainguet René Létolle Frédéric Dumay |
| |
| Institution: | 1. Laboratoire de géographie zonale pour le développement, université de Reims–Champagne-Ardenne, 57, rue Pierre-Taittinger, 51100 Reims, France;2. Université Pierre-et-Marie-Curie, 4, place Jussieu, 75252 Paris cedex 05, France |
| |
| Abstract: | The endorheic basin of the Aral Sea, a tectonic depression resulting from two Tertiary fault bundles, NNE–SSW and east–west ones, represents the termination of a flow by closure of the Aral Basin opposite Central Asia and Siberia. The conditions of Quaternary climate and sediment deposition, especially aridity increased by coldness, a pedogenesis inhibitor, and absence of palaeosoils favour the activity of the Aralian Regional Aeolian Action System (RAAS), 700 km long. Such a system develops in a lowland topography where wind, in a progressive shift, reconstructs by deflation the sandy material resulting from Pleistocene accumulations, gives rise to thin and vulnerable ergs and explains at once the fertility of Khoresm and the dewatering of the Aral Sea, which is one of the most complex and severe ecological catastrophe in the 20th century. To cite this article: M. Mainguet et al., C. R. Geoscience 334 (2002) 475–480. |
| |
| Keywords: | Aral Aeolian sand seas Central Asian deserts palaeo-pedogenesis teledetection Aral éolien ergs déserts d'Asie Centrale paléopédogenèse télédétection Géosciences de surface Paléoenvironnement Surface Geosciences Palaeoenvironment |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
