globalchange  > 过去全球变化的重建
DOI: 10.1016/j.jseaes.2019.01.036
WOS记录号: WOS:000464298500012
论文题名:
Provenance and climate changes inferred from magnetic properties of the sediments from the lower Yangtze River (China) during the last 130 years
作者: Zheng, Yan1,2; Yang, Shouye3; Deng, Chenglong4
通讯作者: Zheng, Yan
刊名: JOURNAL OF ASIAN EARTH SCIENCES
ISSN: 1367-9120
EISSN: 1878-5786
出版年: 2019
卷: 175, 页码:128-137
语种: 英语
英文关键词: Provenance ; Climate change ; Yangtze River ; Flood/drought events
WOS关键词: HEAVY-METAL POLLUTION ; DIAGENETIC ALTERATION ; LOWER REACHES ; MAJOR RIVERS ; INNER SHELF ; CHANGJIANG ; EAST ; IMPACTS ; SOIL ; SEA
WOS学科分类: Geosciences, Multidisciplinary
WOS研究方向: Geology
英文摘要:

It is essential to have a clear scientific view on paleoclimate change and its potential environmental and socioeconomic impacts for the prediction of future climate change. Fluvial sediment is one of the best archives for the investigations of high-resolution environmental variability and anthropogenic impacts on catchment over the last hundreds or even thousands years (Anthropocene). In this study, we examine magnetic properties of a 130-year fluvial sediment profile from an island in the main channel of the lower Yangtze mainstream, which aims to determine the connections between modern observational data and paleoclimate signals from sediments. Sediments from the upper Yangtze River is characterized by high concentration of magnetite, which is different from the middle reach. The difference of magnetic properties allows us to trace particles in the lower reach back to upstream of the Yangtze River. Climate change that reconstructed from physical properties of sediment (susceptibility and mean grain size) is comparable to those records in historical documents, which provides a possible way to obtain precise ages. The calibrated sedimentation rate reflects long-term variation of flood/drought events over the catchment, which is dominantly controlled by the climate circulation of Pacific. The enhanced human impacts since 1950s especially in the mid-lower reaches are observed. Therefore, riverine sediment not only contains paleoclimate information, but also reflects human activities.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/138406
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作者单位: 1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China
2.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China
3.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China

Recommended Citation:
Zheng, Yan,Yang, Shouye,Deng, Chenglong. Provenance and climate changes inferred from magnetic properties of the sediments from the lower Yangtze River (China) during the last 130 years[J]. JOURNAL OF ASIAN EARTH SCIENCES,2019-01-01,175:128-137
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