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Late Holocene Indian summer monsoon variations recorded at Lake Erhai, Southwestern China
Hai Xu; Xinying Zhou; Jianghu Lan; Bin Liu; Enguo Sheng; Keke Yu; Peng Cheng; Feng Wu; Bin Hong; Kevin M. Yeager; Sheng Xu
2015
发表期刊Quaternary Research
卷号83期号:2页码:307-314
摘要

In this study we report changes in Indian summer monsoon (ISM) intensity during the past ~ 3500 yr inferred from proxy indices at Lake Erhai, southwestern China. Both the pollen concentrations and other proxy indices, including sediment grain size, total organic carbon contents (TOC), and elemental contents (e.g., Fe, Al), clearly indicate a long term decreasing trend in ISM intensity over the late Holocene. During the period from approximately AD 750 to AD 1200, pollen concentrations of conifer and broadleaf trees, and herbs reached the lowest levels over the past ~ 3500 yr; while the pollen percentages of both herbs and broadleaf trees increased, suggesting a significant medieval drought. The grain size, TOC, and elemental contents also support an arid climate during the medieval period. The Little Ice Age (LIA) at Lake Erhai was characterized as cold and wet. The medieval and LIA climatic patterns at Lake Erhai were similar to those over most of the ISM areas, but anti-phase with those over East Asian summer monsoon (EASM) areas. We suspect that sea surface temperature variations in the Indo-Pacific oceans and the related land-sea thermal contrasts may be responsible for such hydroclimatic differences between EASM and ISM areas.

关键词Lake Erhai In Southwestern chIna Indian Summer Monsoon precipitation late Holocene medieval Period
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/9544
专题环境地球化学国家重点实验室
作者单位1.State key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
2.Laboratory of Human Evolution and Archeological Science, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China
3.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China
4.Department of Earth and Environmental Sciences, University of KY, Lexington KY40506, USA
5.Scottish Universities Environmental Research Centre, East Kilbride, Glasgow G75 0QF, United Kingdom
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GB/T 7714
Hai Xu,Xinying Zhou,Jianghu Lan,et al. Late Holocene Indian summer monsoon variations recorded at Lake Erhai, Southwestern China[J]. Quaternary Research,2015,83(2):307-314.
APA Hai Xu.,Xinying Zhou.,Jianghu Lan.,Bin Liu.,Enguo Sheng.,...&Sheng Xu.(2015).Late Holocene Indian summer monsoon variations recorded at Lake Erhai, Southwestern China.Quaternary Research,83(2),307-314.
MLA Hai Xu,et al."Late Holocene Indian summer monsoon variations recorded at Lake Erhai, Southwestern China".Quaternary Research 83.2(2015):307-314.
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