Mass accumulation rate changes in Chinese loess during MIS 2, andasynchrony with records from Greenland ice cores and North PacificOcean sediments during the Last Glacial Maximum
Kang,SG(Kang,Shugang)[1]; Roberts,HM(Roberts,Helen M)[2]; Wang,XL(Wang,Xulong)[1]; An,ZS(An,Zhisheng)[1]; Wang,M(Wang,Min)[3]
2015-06
发表期刊Aeolian Research
卷号19期号:2015页码:251-258
文章类型期刊论文
摘要

Sensitivity-corrected quartz optically stimulated luminescence (OSL) dating methods have been widely accepted as a promising tool for the construction of late Pleistocene chronology and mass or dust accumulation rates (MARs or DARs) on the Chinese Loess Plateau (CLP). Many quartz OSL ages covering marine isotope stage (MIS) 2 (equal to L1-1 in Chinese loess) have been determined for individual sites within the CLP in the past decade. However, there is still a lack of detailed MAR or DAR reconstruction during MIS 2 across the whole of the CLP. Here, we present detailed MARs determined for eight sites with closely-spaced quartz OSL ages covering MIS 2, and relative MARs suggested by a probability density analysis of 159 quartz OSL ages ranging from 30 to 10 ka ago, from 15 sites on the CLP. The results show enhanced dust accumulation during the Last Glacial Maximum (LGM), with particularly rapid dust accumulation from 23 to 19 ka ago (the late LGM). In contrast, MARs determined for the last deglaciation (from 19 to 12 ka ago) are low. The MAR changes during MIS 2 in Chinese loess are mainly controlled by the East Asian winter monsoon (EAWM) intensity, which is forced by Northern Hemisphere ice volume. The MAR changes also indicate that dust accumulation during MIS 2 is generally continuous at millennial time scales on the CLP. Comparison of Asian-sourced aeolian dust MARs in Chinese loess with those preserved in Greenland ice cores and North Pacific Ocean sediments indicates that rapid dust accumulation occurred from 26 to 23 ka ago (the early LGM) in Greenland ice cores and North Pacific Ocean sediments, suggesting a several kilo-year difference in timing when compared with the rapid dust accumulation during the late LGM in Chinese loess. This asynchronous timing in enhanced dust accumulation is probably related to both changes in the EAWM intensity and changes in the mean position of zone axis of the Westerly jet, both of which are greatly influenced by Northern Hemisphere ice volume. This study highlights the possible influence of changes in the mean position of zone axis of the Westerly jet on long-range transport of Asian-sourced dust.

关键词Chinese Loess Quartz Osl Dust Accumulation Last Glacial Maximum Westerly Jet East Asian Winter Monsoon
DOI10.1016/j.aeolia.2015.05.005
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/361006/9488
专题黄土与第四纪地质国家重点实验室(2010~)
作者单位1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China;
2.Department of Geography and Earth Sciences, Aberystwyth University, Aberystwyth, Ceredigion SY23 3DB, UK;
3.Chinese Academy of Geological Sciences, Beijing 100037, China
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Kang,SG,Roberts,HM,Wang,XL,et al. Mass accumulation rate changes in Chinese loess during MIS 2, andasynchrony with records from Greenland ice cores and North PacificOcean sediments during the Last Glacial Maximum[J]. Aeolian Research,2015,19(2015):251-258.
APA Kang,SG,Roberts,HM,Wang,XL,An,ZS,&Wang,M.(2015).Mass accumulation rate changes in Chinese loess during MIS 2, andasynchrony with records from Greenland ice cores and North PacificOcean sediments during the Last Glacial Maximum.Aeolian Research,19(2015),251-258.
MLA Kang,SG,et al."Mass accumulation rate changes in Chinese loess during MIS 2, andasynchrony with records from Greenland ice cores and North PacificOcean sediments during the Last Glacial Maximum".Aeolian Research 19.2015(2015):251-258.
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