气候变化领域集成服务门户(CCPortal): Black carbon and mercury in the surface sediments of Selin Co, central Tibetan Plateau: Covariation with total carbon

CCPortal

DOI	10.1016/j.scitotenv.2020.137752
	Black carbon and mercury in the surface sediments of Selin Co, central Tibetan Plateau: Covariation with total carbon
	Neupane, Bigyan; Wang, Junbo; Kang, Shichang; Zhang, Yulan; Chen, Pengfei; Rai, Mukesh; Guo, Junming; Yu, Siwei; Thapa, Poonam
通讯作者	Kang, SC (通讯作者)
发表日期	2020
ISSN	0048-9697
EISSN	1879-1026
卷号	721
英文摘要	Tibetan Plateau (TP) is an important geographical region for investigating the long-range transport of pollutants as limited emission sources exist in this region. In this study, based on analysis of 61 surface samples, we report the spatial distribution and concentrations of BC, Hg, total organic carbon (TOC) and inorganic carbon (IC) in surface sediments of Selin Co, the largest lake in central Tibet. The mean BC and Hg concentrations were 0.62 +/- 0.34 mg/g and 32.03 +/- 9.88 ng/g (range: 0.03-1.47 mg/g and 13.83-51.81 ng/g respectively), which were lower than the values from other lakes in the Himalayan-Tibetan Plateau (HTP). BC and Hg exhibited similar spatial distribution in the surface sediments. Similarly, the mean TOC and IC were 2.19 +/- 1.46% and 3.13 +/- 1.07% (range: 0.0007-7.78% and 0.30-5.30% respectively). BC/TOC ratio, as well as char/soot ratio, suggests biomass burning as a major source of BC in the sediments via the influence of long-range transport. The positive correlation between the concentrations of BC and Hg suggests similar emission sources or transport pathway. Concentrations of BC and Hg were higher in fine grain particles (size <-50 mu m) which were capable of transport and deposit in the deeper part of the lake, as suggested by a significant relationship between water depth and particle size. This study elucidates the extent of pollution in very recent ages and also could serve as the basis for paleo-environmental studies in future. (C) 2020 Elsevier B.V. All rights reserved.
关键词	LAKE-SEDIMENTS ELEMENTAL CARBON CLIMATE-CHANGE ATMOSPHERIC-POLLUTION SPATIAL-DISTRIBUTION CRYOSPHERIC CHANGE TEMPORAL VARIATION 3RD POLE CHINA RECORD
英文关键词	Black carbon; Mercury; Spatial distribution; Sediments; Selin Co; Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000535468300015
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259757
推荐引用方式 GB/T 7714	Neupane, Bigyan,Wang, Junbo,Kang, Shichang,et al. Black carbon and mercury in the surface sediments of Selin Co, central Tibetan Plateau: Covariation with total carbon[J]. 中国科学院青藏高原研究所,2020,721.
APA	Neupane, Bigyan.,Wang, Junbo.,Kang, Shichang.,Zhang, Yulan.,Chen, Pengfei.,...&Thapa, Poonam.(2020).Black carbon and mercury in the surface sediments of Selin Co, central Tibetan Plateau: Covariation with total carbon.SCIENCE OF THE TOTAL ENVIRONMENT,721.
MLA	Neupane, Bigyan,et al."Black carbon and mercury in the surface sediments of Selin Co, central Tibetan Plateau: Covariation with total carbon".SCIENCE OF THE TOTAL ENVIRONMENT 721(2020).