Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.aeolia.2015.12.001 |
The origin of bimodal grain-size distribution for aeolian deposits | |
Lin, Yongchong1,2,3; Mu, Guijin1,2; Xu, Lishuai1,2,3; Zhao, Xue1,2,3 | |
通讯作者 | Lin, Yongchong ; Mu, Guijin |
来源期刊 | AEOLIAN RESEARCH |
ISSN | 1875-9637 |
EISSN | 2212-1684 |
出版年 | 2016 |
卷号 | 20页码:80-88 |
英文摘要 | Atmospheric dust deposition is a common phenomenon in arid and semi-arid regions. Bimodal grain size distribution (BGSD) (including the fine component and coarse component) of aeolian deposits has been widely reported. But the origin of this pattern is still debated. Here, we focused on the sedimentary process of modern dust deposition, and analyzed the grain size distribution of modern dust deposition, foliar dust, and aggregation of the aeolian dust collected in Cele Oasis, southern margin of Tarim Basin. The results show that BGSD also appear in a dust deposition. The content of fine components (<20 mu m size fraction) change with temporal and spatial variation. Fine component from dust storm is significant less than that from subsequent floating dust. Fine component also varies with altitude. These indicate that modern dust deposition have experienced changing aerodynamic environment and be reworked during transportation and deposition, which is likely the main cause for BGSD. The dusts from different sources once being well-mixed in airflow are hard to form multiple peaks respectively corresponding with different sources. In addition, the dust deposition would appear BGSD whether aggregation or not. Modern dust deposition is the continuation of ancient dust deposition. They both may have the same cause of formation. Therefore, the origin of BGSD should provide a theoretical thinking for reconstructing the palaeo-environmental changes with the indicator of grain size. (C) 2015 Elsevier B.V. All rights reserved. |
英文关键词 | Aeolian deposit Bimodal grain size distribution Dust storm Loess Tarim Basin |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000372381500008 |
WOS关键词 | CHINESE LOESS ; DUST DEPOSITION ; NORTHERN CHINA ; WINTER MONSOON ; ALPINE SOILS ; PROVENANCE ; TRANSPORT ; ACCUMULATION ; SEDIMENTS ; AEROSOLS |
WOS类目 | Geography, Physical |
WOS研究方向 | Physical Geography |
来源机构 | 中国科学院新疆生态与地理研究所 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/191005 |
作者单位 | 1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, 818th South Beijing Rd, Urumqi 830011, Peoples R China; 2.Cele Natl Stn Observat & Res Desert Grassland Eco, Cele 848300, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Lin, Yongchong,Mu, Guijin,Xu, Lishuai,et al. The origin of bimodal grain-size distribution for aeolian deposits[J]. 中国科学院新疆生态与地理研究所,2016,20:80-88. |
APA | Lin, Yongchong,Mu, Guijin,Xu, Lishuai,&Zhao, Xue.(2016).The origin of bimodal grain-size distribution for aeolian deposits.AEOLIAN RESEARCH,20,80-88. |
MLA | Lin, Yongchong,et al."The origin of bimodal grain-size distribution for aeolian deposits".AEOLIAN RESEARCH 20(2016):80-88. |
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