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Late Miocene - early Pleistocene climate change in the mid-latitude westerlies and their influence on Asian monsoon as constrained by the K/Al ratio record from drill core Ls2 in the Tarim Basin
Chang, Hong; An, Zhisheng; Wu, Feng; Song, Yougui; Qiang, Xiaoke; Li, Leyi
2017-06-01
发表期刊CATENA
卷号153期号:2017页码:75-82
文章类型Article
摘要In order to study the evolution of westerly mid-latitude winds, we analyzed K/Al records from lacustrine and fluvial sediments of drill core Ls2 in the eastern Tarim Basin, for which the sedimentary record is continuous and well dated back to the late Miocene by magnetostratigraphy. The K/Al ratio obtained from drill core Ls2 may be a proxy index for precipitation amounts in the Tarim Basin. K/Al ratios from drill core Ls2 indicate that precipitation increased gradually in the Tarim Basin from 7.24-634 Ma, with a brief but rapid decrease from 6.708-6.702 Ma. Climate became increasingly arid beginning at similar to 5.68 Ma. We attribute these paleoclimatic changes in the Tarim Basin in western China to: (1) global phenomena, such as the expansion of global ice volume, and (2) regional forcings, such as the growth of the Tibetan Plateau and the retreat of the Paratethys Ocean. Expansion of global ice volume and uplift of the Tibetan Plateau migrated Westerlies southward, which results in the transport of moisture to the south and east of the Plateau and enhanced the aridification of western China. The retreat of the Paratethys Ocean may have further exacerbated the lack of water vapor. The change of westerly wind's in the late Miocene-Early Pliocene may have influenced East Asian climate on the basis of comparison climatic indices from these two regions. (C) 2017 Elsevier B.V. All rights reserved.
关键词Climate Change K/al Ratio Arid Late Miocene-pleistocene Westerlies Asian Winter Monsoon
WOS标题词Science & Technology ; Physical Sciences ; Life Sciences & Biomedicine
DOI10.1016/j.catena.2017.02.002
关键词[WOS]NORTHERN TIBETAN PLATEAU ; RESOLUTION MAGNETO STRATIGRAPHY ; CHINESE LOESS PLATEAU ; ALTYN-TAGH FAULT ; QAIDAM BASIN ; ENVIRONMENTAL-CHANGES ; ATMOSPHERIC CIRCULATION ; CENOZOIC DEFORMATION ; LACUSTRINE RECORD ; QINGHAI PROVINCE
收录类别SCI
语种英语
WOS研究方向Geology ; Agriculture ; Water Resources
WOS类目Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号WOS:000396950500009
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5501
专题古环境研究室
作者单位Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
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Chang, Hong,An, Zhisheng,Wu, Feng,et al. Late Miocene - early Pleistocene climate change in the mid-latitude westerlies and their influence on Asian monsoon as constrained by the K/Al ratio record from drill core Ls2 in the Tarim Basin[J]. CATENA,2017,153(2017):75-82.
APA Chang, Hong,An, Zhisheng,Wu, Feng,Song, Yougui,Qiang, Xiaoke,&Li, Leyi.(2017).Late Miocene - early Pleistocene climate change in the mid-latitude westerlies and their influence on Asian monsoon as constrained by the K/Al ratio record from drill core Ls2 in the Tarim Basin.CATENA,153(2017),75-82.
MLA Chang, Hong,et al."Late Miocene - early Pleistocene climate change in the mid-latitude westerlies and their influence on Asian monsoon as constrained by the K/Al ratio record from drill core Ls2 in the Tarim Basin".CATENA 153.2017(2017):75-82.
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