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Initiation and variation of the dune fields in semi-arid China - with a special reference to the Hunshandake Sandy Land, Inner Mongolia
Yang, XP (Yang, Xiaoping)[ 1 ]; Wang, XL (Wang, Xulong)[ 2 ]; Liu, ZT (Liu, Ziting)[ 1 ]; Li, HW (Li, Hongwei)[ 1 ]; Ren, XZ (Ren, Xiaozun)[ 1 ]; Zhang, DG (Zhang, Deguo)[ 1 ]; Ma, ZB (Ma, Zhibang)[ 1 ]; Rioual, P (Rioual, Patrick)[ 1 ]; Jin, XD (Jin, Xindi)[ 1 ]; Scuderi, L (Scuderi, Louis)[ 3 ]
2013-10-15
发表期刊QUATERNARY SCIENCE REVIEWS
卷号78页码:369-380
文章类型期刊论文
摘要

Sedimentary sequences occurring in desert dunes reflect changes in desert systems, and as such may contain signals useful for recognizing spatial and temporal changes of deserts and their response to regional or even global climate fluctuations. Geomorphological and palaeoenvironmental studies within the dune fields of the Asian middle-latitudes have provided some solid evidence for interpreting the history of these sand seas. Using the Hunshandake (Otindag) Sandy Land, a sandy area covered primarily by stabilized dunes and located in the semi-arid zone of eastern Inner Mongolia, China (Fig. 1), as an example, we studied the initiation and variation in the dune landscape in the eastern portion of the desert belt in northern China. On the basis of physical and biochemical indicators in the sediments and OSL chronology, we herein argue that this dune system in the middle latitudes of eastern Asia is much younger than previously assumed and that it has responded sensitively to climate change during the late Quaternary. Geological evidence from the Sandy Land suggests that most of the current dunes are of late Pleistocene or even Holocene age. Palaeosols intercalated in the aeolian sequences and their OSL chronology show that the climate of the Hunshandake was much wetter than today between 9.6 ka and 3 ka. This resulted in stabilization of the dunes in the eastern and central portions of the Sandy Land. Epochs of reworking or stabilization of the dunes are broadly consistent with the fluctuations in northern hemisphere solar radiation although with an obvious time lag. Because the increase rate of annual precipitation was not sufficient to fully stabilize the dunes in more arid part of the region, some active dunes persisted even during this long-lasting wetter epoch. We conclude that periods of Holocene dune stabilization due to palaeosol formation varied along the climate gradients across the various sandy lands of northern China, and in general it began earlier and lasted longer in the east than in the west. The general nature of the sandy lands and their counterparts in the western portion of the desert belt during the LGM and mid-Holocene climate optimum is discussed in comparison with their current states.

关键词Desert Palaeosol Aeolian System Sand Dune Climate Change Holocene Pleistocene Middle Latitude Hunshandake China
DOI10.1016/j.quascirev.2013.02.006
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/10034
专题现代环境研究室
通讯作者Yang, XP (Yang, Xiaoping)[ 1 ]
作者单位1.Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box 9825,Beijing 100029, China;
2.Institute of Earth Environment, Chinese Academy of Sciences, Xian 710075, China;
3.Department of Earth and Planetary Sciences, University of New Mexico, MSC03 2040 Albuquerque, NM 87131, USA
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GB/T 7714
Yang, XP ,Wang, XL ,Liu, ZT ,et al. Initiation and variation of the dune fields in semi-arid China - with a special reference to the Hunshandake Sandy Land, Inner Mongolia[J]. QUATERNARY SCIENCE REVIEWS,2013,78:369-380.
APA Yang, XP .,Wang, XL .,Liu, ZT .,Li, HW .,Ren, XZ .,...&Scuderi, L .(2013).Initiation and variation of the dune fields in semi-arid China - with a special reference to the Hunshandake Sandy Land, Inner Mongolia.QUATERNARY SCIENCE REVIEWS,78,369-380.
MLA Yang, XP ,et al."Initiation and variation of the dune fields in semi-arid China - with a special reference to the Hunshandake Sandy Land, Inner Mongolia".QUATERNARY SCIENCE REVIEWS 78(2013):369-380.
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