气候变化领域集成服务门户(CCPortal): Accumulation of Pollutants in Proglacial Lake Sediments: Impacts of Glacial Meltwater and Anthropogenic Activities

CCPortal

DOI	10.1021/acs.est.0c01849
	Accumulation of Pollutants in Proglacial Lake Sediments: Impacts of Glacial Meltwater and Anthropogenic Activities
	Zhu, Tingting; Wang, Xiaoping; Lin, Hai; Ren, Jiao; Wang, Chuanfei; Gong, Ping
通讯作者	Wang, XP (通讯作者)
发表日期	2020
ISSN	0013-936X
EISSN	1520-5851
起始页码	7901
结束页码	7910
卷号	54 期号:13
英文摘要	With global warming, the melting of glaciers can result in the release of pollutants into the environment. For remote Alpine lakes, both atmosphere-deposited anthropogenic pollutants and glacier-released pollutants can eventually sink in the sediment. To date, there has, to the best of our knowledge, been no attempt at quantifying the contributions of these processes to the accumulation of pollutants in glacial lake sediment. To fill this gap, a semi-enclosed proglacial lake located in the southern Tibetan Plateau was chosen and a 28 cm sediment core, which can be dated back to 1836, was used to explore the temporal trends of trace elements, Hg, and black carbon (BC) during the past two centuries. Geochemical indicators (Rb/Sr, Ti-Zr-Hf, and sedimentary rate) in sediment showed an overall continuous warming of the lake, while the temporal trends of fluxes of toxic elements and BC were broadly associated with their emission patterns. By using a positive matrix factorization model, the contribution of the anthropogenic source rose from <10% in the 1850s to >40% after the 1980s. However, the signal of glacial meltwater release was also distinct, and the greatest contribution of ice-snow meltwater reached up to 61% in the 1950s. Regarding the most recent two decades, 90% of pollutant deposition in the Tibetan sediment can be attributed to the combined forces of primary emissions and glacial release.
关键词	POLYCYCLIC AROMATIC-HYDROCARBONS PERSISTENT ORGANIC POLLUTANTS SOUTHERN TIBETAN PLATEAU SPATIAL-DISTRIBUTION HEAVY-METALS BLACK CARBON SOURCE APPORTIONMENT HISTORICAL TRENDS CLIMATE-CHANGE REMOTE LAKE
语种	英语
WOS研究方向	Engineering ; Environmental Sciences & Ecology
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000548584900021
来源期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
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/259828
推荐引用方式 GB/T 7714	Zhu, Tingting,Wang, Xiaoping,Lin, Hai,et al. Accumulation of Pollutants in Proglacial Lake Sediments: Impacts of Glacial Meltwater and Anthropogenic Activities[J]. 中国科学院青藏高原研究所,2020,54(13).
APA	Zhu, Tingting,Wang, Xiaoping,Lin, Hai,Ren, Jiao,Wang, Chuanfei,&Gong, Ping.(2020).Accumulation of Pollutants in Proglacial Lake Sediments: Impacts of Glacial Meltwater and Anthropogenic Activities.ENVIRONMENTAL SCIENCE & TECHNOLOGY,54(13).
MLA	Zhu, Tingting,et al."Accumulation of Pollutants in Proglacial Lake Sediments: Impacts of Glacial Meltwater and Anthropogenic Activities".ENVIRONMENTAL SCIENCE & TECHNOLOGY 54.13(2020).