Elemental carbon and polycyclic aromatic compounds in a 150-year sediment core from Lake Qinghai, Tibetan Plateau, China: influence of regional and local sources and transport pathways

Environmental Science & Technology
Y M HanZ S An

Abstract

Elemental carbon (EC) and polycyclic aromatic compounds (PACs) are potential proxies for the reconstruction of change in human activities and the origin of air masses in historic times. In this study, the historic deposition of char and soot (the two subtypes of EC) and PACs in a 150-year sediment core from different topographic subbasins of Lake Qinghai on the Qinghai Tibetan Plateau (QTP) were reconstructed. The objective was to explore how the variations in the concentrations of EC and PACs, in the ratios of char to soot and of oxygenated polycyclic aromatic hydrocarbons (OPAHs) to parent PAHs, and in the composition of the PAC mixtures reflect historical changes in climate and human activity and the origin of air masses arriving at the QTP. The deposition fluxes of soot in the different subbasins were similar, averaging 0.18 (range of 0.15-0.25) and 0.16 (0.13-0.23) g m(-2) year(-1), respectively, but they varied for char (averaging 0.11 and 0.22 g m(-2) year(-1), respectively), suggesting ubiquitous atmospheric deposition of soot and local river inputs of char. The different vertical distributions of the char/soot ratios in the different subbasins can be interpreted in terms of the different transport mechanisms of char an...Continue Reading

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Citations

Sep 27, 2016·The Science of the Total Environment·Quanlian LiPengfei Chen
Nov 11, 2016·Environmental Science and Pollution Research International·Johnny GaspériRégis Moilleron
Oct 26, 2018·Environmental Science. Processes & Impacts·Jingjing Du, Chuanyong Jing
Apr 19, 2017·Environmental Geochemistry and Health·Ruiqiang YangChuanyong Jing
Nov 28, 2018·International Journal of Environmental Research and Public Health·Yan LiShaohua Wu
Aug 9, 2019·Environmental Science and Pollution Research International·Kun LiuBing Chen
Apr 18, 2020·Environmental Science and Pollution Research International·Shani TiwariBing Chen
Jun 5, 2020·Environmental Science and Pollution Research International·Weijian XuLiping Lou
Jan 30, 2021·The Science of the Total Environment·Weijian XuLiping Lou
Jan 30, 2021·Ecotoxicology and Environmental Safety·Ishwar Chandra Yadav, Ningombam Linthoingambi Devi
Oct 24, 2017·The Science of the Total Environment·Benjamin A Musa BandoweTobias Schneider
Apr 23, 2021·Environmental Science & Technology·Changchun HuangYanhong Yu

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