DOI: 10.1016/j.quascirev.2013.02.006
Scopus记录号: 2-s2.0-84885190999
论文题名: Initiation and variation of the dune fields in semi-arid China - with aspecial reference to the Hunshandake Sandy Land, Inner Mongolia
作者: Yang X. ; Wang X. ; Liu Z. ; Li H. ; Ren X. ; Zhang D. ; Ma Z. ; Rioual P. ; Jin X. ; Scuderi L.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 78 起始页码: 369
结束页码: 380
语种: 英语
英文关键词: Aeolian system
; China
; Climate change
; Desert
; Holocene
; Hunshandake
; Middle latitude
; Palaeosol
; Pleistocene
; Sand dune
Scopus关键词: Aeolian systems
; China
; Desert
; Holocenes
; Hunshandake
; Middle latitude
; Palaeosol
; Pleistocene
; Sand dunes
; Arid regions
; Climate change
; Sediments
; Signal processing
; Stabilization
; Sun
; Landforms
; chronology
; climate variation
; desert
; dune field
; eolian process
; geomorphology
; Holocene
; Last Glacial Maximum
; luminescence dating
; paleoenvironment
; paleolatitude
; paleosol
; Pleistocene
; sedimentary sequence
; semiarid region
; solar radiation
; spatial variation
; temporal variation
; China
; Hunshandake Desert
; Nei Monggol
英文摘要: 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 9.6ka and 3ka. 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. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60501
Appears in Collections: 过去全球变化的重建
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作者单位: Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box 9825, Beijing 100029, China; Institute of Earth Environment, Chinese Academy of Sciences, Xian 710075, China; Department of Earth and Planetary Sciences, University of New Mexico, MSC03 2040 Albuquerque, NM 87131, United States
Recommended Citation:
Yang X.,Wang X.,Liu Z.,et al. Initiation and variation of the dune fields in semi-arid China - with aspecial reference to the Hunshandake Sandy Land, Inner Mongolia[J]. Quaternary Science Reviews,2013-01-01,78