气候变化领域集成服务门户(CCPortal): Decoupling Natural and Anthropogenic Mercury and Lead Transport from South Asia to the Himalayas

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DOI	10.1021/acs.est.0c00429
	Decoupling Natural and Anthropogenic Mercury and Lead Transport from South Asia to the Himalayas
	Huang, Jie; Kang, Shichang; Yin, Runsheng; Lin, Mang; Guo, Junming; Ram, Kirpa; Li, Chaoliu; Sharma, Chhatra; Tripathee, Lekhendra; Sun, Shiwei; Wang, Feiyue
通讯作者	Huang, J (通讯作者)
发表日期	2020
ISSN	0013-936X
EISSN	1520-5851
起始页码	5429
结束页码	5436
卷号	54 期号:9
英文摘要	Mercury (Hg) and lead (Pb) accumulation since the Industrial Revolution has been generally observed to increase concurrently in lake sedimentary records around the world. Located downwind during the monsoon season from the rapidly developing South Asia, the Himalayas and the Tibetan Plateau are expected to receive direct anthropogenic Hg and Pb loadings, yet the source, pathway, and effects of such transport remain poorly known due to logistic challenges in accessing this region. When studying the sediment record from Lake Gokyo (4750 m above sea level (a.s.l.)) in the Himalayas, we find remarkably different Hg and Pb accumulation trends over the past 260 years. Although Hg accumulation has continued to increase since the Industrial Revolution, Pb accumulation peaked during that time and has been decreasing since then. Stable isotope analysis reveals that the decoupling trends between these two elements are due to different sources and pathways of Hg and Pb in the region. Both delta Hg-202 and Delta Hg-199 have been increasing since the Industrial Revolution, suggesting that anthropogenic Hg emissions from South Asia have been continuously increasing and that the Indian monsoon-driven wet deposition of atmospheric Hg is the dominant pathway for Hg accumulation in the sediments. In contrast, analysis of Pb-206/Pb-207 and (208)pb/Pb-207 ratios suggests that Pb accumulation in the sediments originates primarily from natural sources and that the decreasing trend of Pb accumulation is most likely due to a weakening input of atmospheric mineral dust by the westerlies. These decoupling trends highlight the ongoing issue of transboundary Hg transport to the Himalayas and the Tibetan Plateau that are source waters for major freshwater systems in Asia and calls for regional and international collaborations on Hg emission controls in South Asia.
关键词	ISOTOPIC COMPOSITION TIBETAN PLATEAU ATMOSPHERIC DEPOSITION ALPINE LAKE ICE CORE SEDIMENTS DUST PB SIGNATURES RECONSTRUCTION
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:000530651900018
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/260029
推荐引用方式 GB/T 7714	Huang, Jie,Kang, Shichang,Yin, Runsheng,et al. Decoupling Natural and Anthropogenic Mercury and Lead Transport from South Asia to the Himalayas[J]. 中国科学院青藏高原研究所,2020,54(9).
APA	Huang, Jie.,Kang, Shichang.,Yin, Runsheng.,Lin, Mang.,Guo, Junming.,...&Wang, Feiyue.(2020).Decoupling Natural and Anthropogenic Mercury and Lead Transport from South Asia to the Himalayas.ENVIRONMENTAL SCIENCE & TECHNOLOGY,54(9).
MLA	Huang, Jie,et al."Decoupling Natural and Anthropogenic Mercury and Lead Transport from South Asia to the Himalayas".ENVIRONMENTAL SCIENCE & TECHNOLOGY 54.9(2020).