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DOI	10.1016/j.atmosres.2019.104691
	Measurement of mercury; other trace elements and major ions in wet deposition at Jomsom: The semi-arid mountain valley of the Central Himalaya
	Tripathee L.; Guo J.; Kang S.; Paudyal R.; Sharma C.M.; Huang J.; Chen P.; Sharma Ghimire P.; Sigdel M.; Sillanpää M.
发表日期	2020
ISSN	0169-8095
卷号	234
英文摘要	South Asian pollutants can be transported and deposited via wet/dry deposition to the remote areas of the Himalayas and could pose a serious threat to the mountain ecosystems. Therefore, in order to understand the concentrations, fluxes, seasonal variation and origin of the mercury (Hg), major ions and trace elements, precipitation samples were collected during 2012–2013 from a data gap region, Jomsom, the high elevation semi-arid mountain valley in the central Himalayas. The volume-weighted mean (VWM) concentrations of ions followed the order of Ca2+ > Mg2+ > Na+ > NH4 + > SO4 2− > Cl− > NO3 − > K+. The concentration of Cd was lowest (0.07 μg L−1) whereas that of Fe was the highest (1073.59 μg L−1) in the precipitation samples. Wet deposition level of all the measured inorganic species was comparable to urban Lhasa but higher than those in remote alpine sites of the Tibetan Plateau (TP). This study shows that Hg and other inorganic constituents were higher in the non-monsoon season compared to monsoon due to enhanced washout of aerosols. Enrichment factor (EF), sea salt fraction, crustal and anthropogenic fractions, principal component analysis (PCA) and correlation coefficient analysis suggested that crustal dust and anthropogenic activities as the major sources of measured chemical species whereas the influence of sea-salt was minimal. In addition, local anthropogenic emissions were low suggesting that the majority of the pollutants could have been transported from the South Asian region to the high elevation mountains. Meanwhile, low precipitation and dry environment could have enhanced the concentrations of inorganic species in the arid region than other sites over the central Himalayas. This work adds new dataset of inorganic pollutants in wet precipitation and provides baseline information for an arid region environmental protection. However, there is a need for further long-term monitoring to understand the precipitation chemistry of the arid regions. © 2019 Elsevier B.V.
英文关键词	Himalayas; Major ions; Mercury; Semi-arid region; Trace elements; Wet deposition
语种	英语
scopus关键词	Arid regions; Atmospheric thermodynamics; Chemical analysis; Deposition; Ions; Landforms; Mercury (metal); Pollution; Principal component analysis; Urban growth; Anthropogenic activity; Anthropogenic emissions; Correlation coefficient; Himalayas; Major ions; Precipitation chemistry; Semi-arid region; Wet deposition; Trace elements; concentration (composition); ion; mercury (element); mountain region; seasonal variation; semiarid region; trace element; wet deposition; Himalayas
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141972
作者单位	State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences (CAS), Lanzhou730000, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100085, China; Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese, Academy of Sciences, Beijing, 100101, China; Himalayan Environment Research Institute (HERI), Kathmandu, Nepal; University of Chinese Academy of Sciences, Beijing, 100049, China; Central Department of Environmental Science, Tribhuvan University, Kathmandu, Nepal; Central Department of Hydrology and Meteorology, Tribhuvan University, Kathmandu, Nepal; Laboratory of Green Chemistry, Lappeenranta University of Technology, Sammonkatu 12, Mikkeli, FI-50130, Finland
推荐引用方式 GB/T 7714	Tripathee L.,Guo J.,Kang S.,et al. Measurement of mercury; other trace elements and major ions in wet deposition at Jomsom: The semi-arid mountain valley of the Central Himalaya[J],2020,234.
APA	Tripathee L..,Guo J..,Kang S..,Paudyal R..,Sharma C.M..,...&Sillanpää M..(2020).Measurement of mercury; other trace elements and major ions in wet deposition at Jomsom: The semi-arid mountain valley of the Central Himalaya.Atmospheric Research,234.
MLA	Tripathee L.,et al."Measurement of mercury; other trace elements and major ions in wet deposition at Jomsom: The semi-arid mountain valley of the Central Himalaya".Atmospheric Research 234(2020).