Arid
DOI10.1016/j.jseaes.2017.11.001
Fine-grained quartz OSL dating chronology of loess sequence from southern Tajikistan: Implications for climate change in arid central Asia during MIS 2
Wang, Leibin1; Jia, Jia1; Li, Guoqiang1; Li, Zaijun1; Wang, Xin1; Chen, Fahu1,2
通讯作者Wang, Leibin ; Jia, Jia
来源期刊JOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
EISSN1878-5786
出版年2018
卷号155页码:116-123
英文摘要

The desert and semi-desert region of arid central Asia is one of the most important areas of middle-latitude dust emission and deposition in the Northern Hemisphere. Marine isotope stage 2 (MIS 2) was the latest and one of the most representative intervals of dust emission from the region, and it is especially important for research into processes of dust transportation and deposition. Here, we report the results of an optically stimulated luminescence study of the Hoalin section in southern Tajikistan, which was deposited during MIS 2. The fine-grained quartz single aliquot regeneration (SAR) approach was used and its reliability was verified by internal checks. In addition, grain-size analyses, calculated dust accumulation rates (DARs) and mass accumulation rates (MARs) were used to reconstruct the pattern of climate change during MIS 2. The mean DAR for southern Tajikistan during MIS 2 was 0.43 m/ka, and the corresponding average MAR was 673 g/cm(2)/a for a non-river-terrace site, which is higher than the average MARs estimated for the central and southern Chinese Loess Plateau (CLP). In contrast to previous suggestions, the high dust DARs and MARs during the LGM indicate a ’cold-dry’ climatic pattern, rather than a ’cold-humid’ pattern. Our results also confirm that the patterns of high dust emission and deposition during the LGM in the mid-latitude arid zone of Asia were synchronous.


英文关键词Loess LGM OSL dating Southern Tajikistan
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000428006300009
WOS关键词LAST GLACIAL MAXIMUM ; REGENERATIVE-DOSE PROTOCOL ; CHINESE LOESS ; LATE PLEISTOCENE ; WESTERN CHINA ; ILI BASIN ; PALEOSOL SEQUENCE ; LACUSTRINE RECORD ; DUST ACCUMULATION ; LATE QUATERNARY
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
来源机构兰州大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/210647
作者单位1.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China;
2.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714
Wang, Leibin,Jia, Jia,Li, Guoqiang,et al. Fine-grained quartz OSL dating chronology of loess sequence from southern Tajikistan: Implications for climate change in arid central Asia during MIS 2[J]. 兰州大学,2018,155:116-123.
APA Wang, Leibin,Jia, Jia,Li, Guoqiang,Li, Zaijun,Wang, Xin,&Chen, Fahu.(2018).Fine-grained quartz OSL dating chronology of loess sequence from southern Tajikistan: Implications for climate change in arid central Asia during MIS 2.JOURNAL OF ASIAN EARTH SCIENCES,155,116-123.
MLA Wang, Leibin,et al."Fine-grained quartz OSL dating chronology of loess sequence from southern Tajikistan: Implications for climate change in arid central Asia during MIS 2".JOURNAL OF ASIAN EARTH SCIENCES 155(2018):116-123.
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