文献类型：期刊文献

英文题名：Natural and anthropogenic controls on environmental change during the Holocene based on a multi-proxy record obtained from subalpine peatland in southern China

作者：Qu, Xiaoxu[1]; Huang, Chao[1,2,3,4]; Rao, Zhiguo[5]; Wu, Liyuan[1]; Luo, Yongyi[1]; Chen, Fajin[1,3,4]; Li, YunXia[5]; Zhao, Lin[5]; Liu, Lidan[5]; Song, Zhiguang[6]; Deng, Wenfeng[7]

机构：[1] Laboratory for Coastal Ocean Variation and Disaster Prediction, College of Ocean and Meteorology, Guangdong Ocean University, Guangdong, Zhanjiang, 524088, China; [2] Key Laboratory of Marine Mineral Resources, Ministry of Natural Resources, Guangzhou Marine Geological Survey, Guangzhou, 511458, China; [3] Key Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong Province, Guangdong Ocean University, Zhanjiang, 524088, China; [4] Key Laboratory of Space Ocean Remote Sensing and Application, Ministry of Natural Resources, China; [5] Hunan Provincial Key Laboratory for Eco-environmental Changes and Carbon Sequestration of the Dongting Lake Basin, School of Geographical Sciences, Hunan Normal University, Changsha, 410081, China; [6] College of Chemistry and Environment, Guangdong Ocean University, Zhanjiang, 524088, China; [7] State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China

年份：2024

卷号：912

外文期刊名：Science of the Total Environment

收录：EI(收录号：20240215350754)、Scopus(收录号：2-s2.0-85181663391)

语种：英文

外文关键词：Atmospheric pressure - Atmospheric thermodynamics - Climate change - Heavy metals - Magnetic susceptibility - Peat - Population statistics

外文摘要：The interactions between past climate, human activity and environmental change in subtropical mountainous areas are poorly understood due to the lack of reliable records in South China. In this study, the evolution of the East Asian summer monsoon (EASM) during the Holocene, and the interactions between regional human activity and environmental change, were studied using multi-proxy records from a subalpine peat core recovered from South China. The chronology of this peat core has been well-constrained by 10 AMS 14C dates of peat stems. A series of proxy indicators, including carbon isotopes (δ13C), loss on ignition (LOI), magnetic susceptibility (MS), the chemical index of alteration (CIA), and geochemical elements from the Shiwangutian (SWGT) peatland were used to reconstruct the palaeohydrological changes during the Holocene. Regional moisture levels showed a generally arid–wet–arid pattern, and three phases of climatic change were detected as follows. 1) Between 11,600 and 9000 cal yr BP, the EASM was weak and a relatively dry climate developed. 2) Between 9000 and 4000 cal yr BP, the prevalence of humid climatic conditions was associated with a strong summer monsoon. 3) After 4000 cal yr BP, the climate shifted to relatively dry conditions. Further comparisons and analysis suggested that solar insolation, migration of the Intertropical Convergence Zone (ITCZ), and El Ni?o-Southern Oscillation (ENSO) activity played an important role in determining the variations in Holocene EASM intensity. In addition, the increase in both MS and heavy metal concentrations over the last 1000 years is consistent with an increase in the population of Hunan Province. Therefore, it can be inferred that population growth and the associated expansion of cropland and mining led to an increase in soil erosion and metal tool use. These findings suggest that the impact of human activity generally outweighed the natural climatic controls on the environment and landscape in the mountainous region of southern China over the last 1000 years. ? 2023 Elsevier B.V.