气候变化领域集成服务门户(CCPortal): Sedimentary records of polycyclic aromatic hydrocarbons and organochlorine pesticides to reconstruct anthropogenic activities in Lake Issyk-Kul region (Kyrgyzstan), and their effects on the lake environment

CCPortal

DOI	10.1016/j.ancene.2024.100426
	Sedimentary records of polycyclic aromatic hydrocarbons and organochlorine pesticides to reconstruct anthropogenic activities in Lake Issyk-Kul region (Kyrgyzstan), and their effects on the lake environment
	Li, Qianyu; Ru, Guo; Wu, Jinglu; Jin, Miao
发表日期	2024
ISSN	2213-3054
起始页码	45
卷号	45
英文摘要	Vertical distributions of polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs) in a sediment core from Lake Issyk-Kul are powerful tools for reconstructing historical anthropogenic activities over the past 350 years. Four periods were identified according to the variations in these environmental proxies. Period I (1670s-1800s) corresponds to a phase of limited anthropogenic activity reflected by the lowest sigma PAH16 concentrations, mainly from biomass combustion and petrogenic processes. Along with pronounced deforestation due to wildfires documented in the pollen record, a similar decrease in PAHs suggests that PAHs were most likely generated by natural sources around Lake Issyk-Kul during this period. Period II (1800s-1930s) reflects increasing agricultural activities with fluctuations in various PAH concentrations. Anthropogenic biomassderived PAH inputs from agricultural activities gradually replaced natural inputs to Lake Issyk-Kul, coinciding with several historical events. However, natural factors still mainly controlled changing lake levels before the 1930s. Period III (1930s-1970s) corresponds to rapid development of agricultural activities, inferred by slight increases in sigma PAH16 concentrations dominated by coal -derived PAHs and a considerable increase in sigma OCP18 concentrations. Concentrated agricultural activities around Lake Issyk-Kul significantly influenced environmental changes in grain size and water level in the lake. Period IV (post -1970 s) corresponds to intensive industrial and urban activities, including a 10 -year economic depression (1990s-2000s), characterized by the highest sigma PAH16 concentrations mainly from petroleum combustion followed by a sharp drop after the 1990s as the dissolution of the Soviet Union. Industrialization and urbanization in study area have changed the trophic state of Lake Issyk-Kul, particularly in recent years. Climate change has also induced lateral remobilization of contaminants, increasing pollution levels in this mountain lake.
英文关键词	PAHs; OCPs; Sediment record; Anthropogenic activities; Lake Issyk-Kul
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography ; Geology
WOS类目	Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:001166258400001
来源期刊	ANTHROPOCENE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301976
作者单位	Anhui Normal University; Chinese Academy of Sciences; Nanjing Institute of Geography & Limnology, CAS; Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Li, Qianyu,Ru, Guo,Wu, Jinglu,et al. Sedimentary records of polycyclic aromatic hydrocarbons and organochlorine pesticides to reconstruct anthropogenic activities in Lake Issyk-Kul region (Kyrgyzstan), and their effects on the lake environment[J],2024,45.
APA	Li, Qianyu,Ru, Guo,Wu, Jinglu,&Jin, Miao.(2024).Sedimentary records of polycyclic aromatic hydrocarbons and organochlorine pesticides to reconstruct anthropogenic activities in Lake Issyk-Kul region (Kyrgyzstan), and their effects on the lake environment.ANTHROPOCENE,45.
MLA	Li, Qianyu,et al."Sedimentary records of polycyclic aromatic hydrocarbons and organochlorine pesticides to reconstruct anthropogenic activities in Lake Issyk-Kul region (Kyrgyzstan), and their effects on the lake environment".ANTHROPOCENE 45(2024).