Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/164094
Title: Stalagmite multi-proxy evidence of wet and dry intervals in the middle Yangtze Valley during the last glacial period
Authors: Meng Wang
Chen, Shitao
Wang, Yongjin
Zhao, Kan
Wang, Xianfeng
Liang, Yijia
Wang, Zhenjun
Zhang, Zhenqiu
Chen, Gongzhe
Keywords: Social sciences::Geography
Issue Date: 2022
Source: Meng Wang, Chen, S., Wang, Y., Zhao, K., Wang, X., Liang, Y., Wang, Z., Zhang, Z. & Chen, G. (2022). Stalagmite multi-proxy evidence of wet and dry intervals in the middle Yangtze Valley during the last glacial period. Palaeogeography, Palaeoclimatology, Palaeoecology, 586, 110764-. https://dx.doi.org/10.1016/j.palaeo.2021.110764
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology
Abstract: There continues to be debate on the wet and dry conditions in central China due to different geological archives and proxy interpretations. This study reconstructed multi-proxy sequences spanning intervals between 65 and 40 ka using high-precision Th-230 dates, which was carried out on a stalagmite from Yongxing cave in the middle Yangtze Valley located in the Meiyu belt, China. Merely according to the petrography of the sample, Heinrich (H) 5-H6, Dansgaard–Oeschger (DO) 9-DO18 (or even secondary changes including DO15a and DO15b; DO17a, DO17b, and DO17c) were directly identified alongside the oxygen isotope record. The δ13C, trace elements, mineralogical, and bio-geochemical proxies exhibited similar millennial changes to that of the δ18O. This provided an indication of responses to millennial-scale climatic events in the karst hydrological cycle, local environment, and soil vegetation; however, the sensitivities to these events differed. Petrographic analyses of the same stalagmite including scanning electrical microscope (SEM), X-ray diffraction (XRD), fluorescence intensity, the deposition rate, and the diameter index depicted a dry-cold climate during the H events, and a wet-warm climate during the DO cycles in the middle Yangtze Valley. These results are consistent with the peat records of Dajiuhu Lake in the same area. We suggest that a combination of Atlantic Meridional Overturning Circulation (AMOC) and El Niño-Southern Oscillation (ENSO) may exert a strong influence on the Meiyu region and the related precipitation.
URI: https://hdl.handle.net/10356/164094
ISSN: 0031-0182
DOI: 10.1016/j.palaeo.2021.110764
Schools: Asian School of the Environment 
Research Centres: Earth Observatory of Singapore 
Rights: © 2021 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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