文献类型：期刊文献

英文题名：Holocene provenance variations and palaeofloods response to ENSO-driven monsoon precipitation in the subalpine peatland in southern China

作者：Qu, Xiaoxu[1];Huang, Chao[1,2,3,4];Rao, Zhiguo[5];Wei, Gangjian[6];Wu, Liyuan[1];Luo, Yongyi[1];Li, Yunxia[5];Zhao, Lin[5];Liu, Lidan[5];Deng, Wenfeng[6]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Guangdong, Peoples R China;[2]Minist Nat Resources, Key Lab Marine Mineral Resources, Guangzhou Marine Geol Survey, Guangzhou 511458, Peoples R China;[3]Guangdong Ocean Univ, Resources & Environm Continental Shelf Sea & Deep, Key Lab Climate, Dept Educ Guangdong Prov, Zhanjiang 524088, Peoples R China;[4]Minist Nat Resources, Key Lab Space Ocean Remote Sensing & Applicat, Beijing, Peoples R China;[5]Hunan Normal Univ, Sch Geog Sci, Hunan Prov Key Lab Ecoenvironm Changes & Carbon Se, Changsha 410081, Peoples R China;[6]Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China

年份：2024

卷号：635

外文期刊名：PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY

收录：SCI-EXPANDED(收录号：WOS:001140660100001)、、Scopus(收录号：2-s2.0-85179952126)、WOS

基金：This work was financially supported by National Natural Science Foundation of China (42371162, 42001078) , Key Laboratory of Marine Mineral Resources, Ministry of Natural and Resources, Guangzhou (No. KLMMR-2022-G10) , Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province, the Innovative Team Project of Guangdong Universities (2019KCXTF021) , First-class Discipline Plan of Guangdong Province (080503032101, 231420003) , Marine Science Research Team Project of Guangdong Ocean University (002026002004) . The data for this paper are available as the online supplementary dataset.

语种：英文

外文关键词：Sr;Nd isotopes; Grain size; Holocene; Peat; ENSO

外文摘要：There have been few investigation of the provenance of sediments and hydrological response to past climatic change in the subalpine peatland in southern China. The source of sediments and regional climatic variations during the Holocene have been deduced from Rare Earth Elements (REEs), Sr-Nd isotopic data and grain size end-member modeling analysis (EMMA) derived from peat sediments from the southwestern mountainous region of Hunan Province, China. From the distinctive Sr-Nd isotopes patterns, LREEs enrichment, and the Eu anomaly observed in these sediments, it can be concluded that local weathering residues have been the primary sedimentary source throughout the Holocene. Based on the method of EMMA, four distinct end members were identified. EM2, signifying weathering products of moderate particle size, is sensitive to climate variations. This sensitivity makes it an effective marker to track the historical evolution of the East Asian summer monsoon (EASM) intensity. The results suggest that the prevalence of the relatively weak EASM during the interval 11,600-9000 cal yr BP, followed by an overall weakening trend during the past 9000 years. EM3 + EM4, the coarsest component in the peat sediments, indicate strong runoff typically caused by the extreme weather events. Notably, the occurrence of relatively high EM3 + EM4 component during the interval 5400-4500 cal yr BP and 3500-2600 cal yr BP is consistent with the previous reported palaeoflood events in the Yangtze River basin. We suggest that the regional flood patterns are predominantly controlled by the East Asian monsoon system, which in turn, is driven by ENSO activities. For a comprehensive understanding of regional flood patterns, it is imperative to extend research into high-altitude areas.