| Paleoclimate and Environment Evolution |
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| Holocene Climate Variations on Millennium-scale from Grain-size Record of CGS1 Segment in the Badain Jaran Desert, China |
| GUO Yi-hua1, LI Bao-sheng1,2, WEN Xiao-hao1, YANG Yi1, NIU Dong-feng1, LI Zhi-wen3, DU Shu-huan1, WANG Feng-nian1, GUO Yuan-jun1 |
1.School of Geography, South China Normal University, Guangzhou 510631, China;
2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xian 710061, China;
3.Geography and Planning School of Sun Yat-sen University, Guangzhou 510275, China |
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Abstract The CGS1 segment of the Chagelebulu section in the southeastern Badain Jaran Desert recorded sedimentary cycles during the Holocene, which consists of dune sands alternating with overlying paleosol or loess. Divided by the 5 Φ (equal to 31.5 m) of Md and Mz, ten obvious cycles (C1 to C10) and one weak cycle (C11) are found. Among them, seven sedimentary cycles of dune sands covered by paleosol or loess show considerable fluctuations over the values of Md and Mz. Besides, the grain-size values of σ, SC/D and >63 μm component content also respond to these cycles. The variations of Md and >63 μm component content in the CGS1 segment reflect the alternation between East Asian summer and winter monsoon. The cold period C1 corresponds to B0 and B1 in the North Atlantic; C2, C3 and C4 correspond to B2, B3 and B4; and C7, C9 and C10 correspond to B5, B6 and B7, respectively. Although B8 is not obvious in the CGS1 segment, <5 Φ low values of Md and Mz appear in this period, whereas the content of >63 μm component correspondingly increase. Particularly, the cold events of C5, C6 and C8 are not discovered in the North Atlantic, but they appear in some places of China. This study suggests that the Holocene frequent climate fluctuations on millennium-scale were subject to the East Asian winter monsoon changes within the overall prevalence of East Asian summer monsoon. Except for C5, C6 and C8, the correlations between the cold event records in the CGS1 segment and those in the North Atlantic reveal that the East Asian monsoon variations in Chinas deserts may account for the corresponding mechanism for Dansgaard-Oeschger oscillations in the North Hemisphere during the Holocene, which serve as the geologic evidence for the desert regional response to the global climate variations in the Holocene.
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Received: 24 February 2012
Published: 20 September 2012
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Cite this article:
GUO Yi-hua, LI Bao-sheng, WEN Xiao-hao, YANG Yi, NIU Dong-feng, LI Zhi-wen, DU Shu-huan, WANG Feng-nian, GUO Yuan-jun. Holocene Climate Variations on Millennium-scale from Grain-size Record of CGS1 Segment in the Badain Jaran Desert, China. JOURNAL OF DESERT RESEARCH, 2012, 32(5): 1248-1255.
URL:
http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2012/V32/I5/1248
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