Mots-clés
Changement climatique Chine Chine du Nord Datation Dune Eolien Loess Luminescence stimulée optiquement Mousson Plateau Poussière éolienne Quaternaire Transport éolien Vitesse d'accumulation Accumulation rate Aeolian dust Aeolian features Aeolian transport China Climatic change Dating Dune Loess Monsoon Northern China Optically stimulated luminescence Plateau Quaternary Cambio climático China China del Norte Cuaternario Datación Duna Eólico Loess Meseta Monzón Polvo eólico Transporte eólico Velocidad de acumulaciónResponse of surface processes to climatic change in the dunefields and Loess Plateau of North China during the late Quaternary
Auteur(s) et Affiliation(s)
LU, H.
School of Geographic and Oceanographic Sciences, Univ., Nanjing, Chine
Dep. of Geography, Univ. of Wisconsin, Madison, Etats-Unis
MASON, J.A.
Dep. of Geography, Univ. of Wisconsin, Madison, Etats-Unis
STEVENS, T.
Centre for Quaternary Research, Dep. of Geography, Univ. of London, Egham, Royaume-Uni
ZHOU, Y.
College of Tourism and Environment, Shaanxi Normal Univ., Xi'an, Chine
YI, S.
School of Geographic and Oceanographic Sciences, Univ., Nanjing, Chine
MIAO, X.
Illinois State Geological Survey, Champaign, Etats-Unis
Description :
The AA. evaluate the relationship between surface processes in the dunefields and the Loess Plateau using data from 4 late Quaternary loess-paleosol sequences in the Chinese Loess Plateau, and 23 stratigraphic sections in the Mu Us, Otindag, and Horqin dunefields. New optically stimulated luminescence (OSL) ages are presented here. Their comparison with loess accumulation rate reveals little evidence for synchronous change in the processes at millennial timescales in the late Quaternary. Explanations for the apparent lack of coupling include local variation in the trapping of dust and post-depositional preservation of the loess and dune sediments, in response to varying local environmental conditions. In addition, a substantial portion of the loess may be transported directly from source areas where dust emission has somewhat different climatic and geomorphic controls than aeolian sand activity within the dunefields.
Type de document :
Article de périodique
Source :
Earth surface processes and landforms, issn : 0197-9337, 2011, vol. 36, n°. 12, p. 1590-1603, nombre de pages : 14, Références bibliographiques : 2 p.
Date :
2011
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
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Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)