Mots-clés
Changement climatique Chine Domaine aride Dune Eolien Granulométrie Géochimie Microstructure Nei Menggu Oasis Tempête de poussière Transport éolien Aeolian features Aeolian transport Arid area China Climatic change Dune Dust storm Geochemistry Grain size distribution Inner Mongolia Microstructure OasisDeposition of sandstorms in a vegetation-covered sand dune in Ejin Oasis and its characteristics
Auteurs :WEN, X.
LI, B.
WANG, W.
LI, S.
OU, X.
ZHENG, Y.
Description :
In this study, 263 samples were taken from the section for grain-size analysis, 25 for chemical analysis, ii for C 14 dating and 6 for scanning electron microscope (SEM). The results indicate that 3 types of the sediments in the section can be identified. The Ejin Section has recorded the repeated dust-storms or sandstorms since 2500 yr BP and these peak periods are consistent with the records of dust rains in historical literatures, indicating that the change of climate is a key factor to increase sandstorms or dust-storms, whreas, artificial factor may only be an accelerating one for desertification.
Type de document :
Article de périodique
Source :
Journal of geographical sciences. Acta geographica sinica, issn : 1009-637X, 2006, vol. 16, n°. 4, p. 502-508, nombre de pages : 7, Collation : Illustration, Références bibliographiques : 28 ref.
Date :
2006
Editeur :
Pays édition : Chine
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)