文献类型：期刊文献

英文题名：Natural and anthropogenic impacts on environmental changes over the past 7500 years based on the multi-proxy study of shelf sediments in the northern South China Sea

作者：Huang, Chao[1,2];Zeng, Ti[3];Ye, Feng[3];Xie, Luhua[3];Wang, Zhibing[1];Wei, Gangjian[1];Lo, Li[1];Deng, Wenfeng[1];Rao, Zhiguo[4]

机构：[1]Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China;[2]Guangdong Ocean Univ, Coll Ocean & Meteorol, Guangdong Prov Key Lab Coastal Ocean Variat & Dis, Zhanjiang 524088, Peoples R China;[3]Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510640, Guangdong, Peoples R China;[4]Hunan Normal Univ, Coll Resources & Environm Sci, Changsha 410081, Hunan, Peoples R China

年份：2018

卷号：197

起止页码：35

外文期刊名：QUATERNARY SCIENCE REVIEWS

收录：SCI-EXPANDED(收录号：WOS:000447085200003)、、EI(收录号：20183305699804)、Scopus(收录号：2-s2.0-85051400405)、WOS

基金：This work was financially supported by the National Key Research and Development Project of China (2016YFA0601204), the National Natural Sciences Foundation of China (41325012), Guangzhou Science, Technology and Innovation Commission (201607020008), the GIGCAS 135 project (135PY201605), and the Guangzhou Institute of Geochemistry (GIG-GNKF-201501). We thank Dr. Tu Xianglin and Dr. Peng Shasha for their assistance with the ICP-MS measurements and magnetic measurements, respectively. We thank Aaron Stallard for improving the English of the manuscript. We thank Professor Chu Guoqiang for sharing the compound-specific delta¹³C27-31 value data from Xiaolongwan Lake, and Dr. Li Jianyong for sharing the pollen-based annual precipitation data from the lower reaches of the Yangtze and Lakes Dalianhai and Qinghai on the Qinghai-Tibetan Plateau and KCM-based annual precipitation in northern China. This work is contribution No.IS-2567 from GIG-CAS. The data for this paper are available as the online supplementary dataset.

语种：英文

外文关键词：Asian summer monsoon; South China Sea; Holocene; Human activity; Chemical weathering; Fluvial discharge

外文摘要：The evolution of the Asian summer monsoon (ASM) over the past 7500 years and regional human-environment interaction over the past 2000 years were investigated using high-resolution multi-proxy records from a well-dated sediment core (YJ Core) from the northern inner shelf of the South China Sea. The chemical index of alteration (CIA) of bulk samples were determined to infer changes in regional chemical weathering intensity, and delta C-13(org) and Total Organic Carbon (TOC) measurements were used to indicate changes in the strength of fluvial discharge. The results suggest intense chemical weathering and strong fluvial discharge during the interval 6800-3500 cal yr BP, followed by a weakening in both factors from 3500 to 2000 cal yr BP, and intensification again after 2000 cal yr BP. Comparison with climatic records from different monsoonal regions indicates that the ASM controlled both the chemical weathering and fluvial discharge intensity before 2000 cal yr BP. The enhanced chemical weathering and fluvial discharge during the past 2000 years coincide with an increase in both magnetic susceptibility (chi(if)) and frequency-dependent magnetic susceptibility (chi(fd)), as well as an increase in sedimentary Cu and Pb concentrations. This interval also saw an increase in the population of Guangdong Province. Therefore, it is inferred that an increase in soil erosion and the use of metal tools were stimulated by a growing human population and the expansion of agricultural and mining practices. The present results suggest that enhanced human activity during the past 2000 years has overall overwhelmed the natural climatic controls on the environment and landscape of the Ling-Nan region (southernmost China). (C) 2018 Elsevier Ltd. All rights reserved.