气候变化领域集成服务门户(CCPortal): Desert dust as a significant carrier of atmospheric mercury

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DOI	10.1016/j.envpol.2020.115442
	Desert dust as a significant carrier of atmospheric mercury
	Huang J.; Kang S.; Yin R.; Ram K.; Liu X.; Lu H.; Guo J.; Chen S.; Tripathee L.
发表日期	2020
ISSN	22966463
卷号	267
英文摘要	The atmospheric circulation plays a critical role in the global transport and deposition of atmospheric pollutants such as mercury (Hg). Desert dust emissions contribute to nearly 60–95% of the global dust budget and thus, desert dust may facilitate atmospheric Hg transport and deposition to the downwind regions worldwide. The role of desert dust in biogeochemical cycling of Hg, however, has not been well recognized by the Hg research community. In this study, we measured the concentration of particulate bound Hg (HgP) in total suspended particulate (TSP) collected from China's largest desert, Taklimakan Desert, between 2013 and 2017. The results show that HgP concentrations over the Taklimakan Desert atmosphere are remarkably higher than those observed from background sites in China and are even comparable to those measured in most of the Chinese metropolitan cities. Moreover, HgP concentrations in the Taklimakan Desert exhibit a distinct seasonal pattern peaking during dust storm outbreak periods in spring and summer (March to August). A preliminary estimation demonstrates that export of total Hg associated with atmospheric dust from the Taklimakan Desert could be 59.7 ± 60.3 (1SD) Mg yr−1. The unexpectedly high HgP concentrations during duststorms, together with consistent seasonal pattern of Hg revealed from the snow/ice, clearly demonstrate that Asian desert dust could act as a significant carrier of atmospheric Hg to the cryosphere of Western China and even can have further global reach. © 2020 Elsevier Ltd
英文关键词	Asian deserts; Atmospheric particulate mercury; Carrier; Desert dust; Western China
语种	英语
scopus关键词	Environmental Pollution
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/158389
作者单位	Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; State Key Laboratory of Cryospheric Science, Northeast Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China; State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China; Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration, Institute of Desert Meteorology, China Meteorological Administration, Urumqi, 830002, China; College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China; Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi, 221005, India; University of the Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Huang J.,Kang S.,Yin R.,et al. Desert dust as a significant carrier of atmospheric mercury[J]. 中国科学院青藏高原研究所,2020,267.
APA	Huang J..,Kang S..,Yin R..,Ram K..,Liu X..,...&Tripathee L..(2020).Desert dust as a significant carrier of atmospheric mercury.,267.
MLA	Huang J.,et al."Desert dust as a significant carrier of atmospheric mercury".267(2020).