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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, Lekhendra; Guo, Junming; Kang, Shichang; Paudyal, Rukumesh; Sharma, Chhatra Mani; Huang, Jie; Chen, Pengfei; Ghimire, Prakriti Sharma; Sigdel, Madan; Sillanpaa, Mika
通讯作者	Tripathee, L ; Guo, JM (通讯作者)
发表日期	2020
ISSN	0169-8095
EISSN	1873-2895
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 semiarid mountain valley in the central Himalayas. The volume-weighted mean (VWM) concentrations of ions followed the order of Ca2+ > Mg2+ > Na+ > NH4+ > SO42- > Cl- > NO3- > K+. The concentration of Cd was lowest (0.07 mu g L-1) whereas that of Fe was the highest (1073.59 mu g 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.
关键词	ATMOSPHERIC BROWN CLOUDS NAM CO REGION PRECIPITATION CHEMISTRY CHEMICAL-COMPOSITION LONG-TERM TIBETAN PLATEAU JIAOZHOU BAY LARGEST CITY REMOTE SITE RURAL SITE
英文关键词	Mercury; Trace elements; Major ions; Wet deposition; Semi-arid region; Himalayas
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000513182600003
来源期刊	ATMOSPHERIC RESEARCH
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/260018
推荐引用方式 GB/T 7714	Tripathee, Lekhendra,Guo, Junming,Kang, Shichang,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]. 中国科学院青藏高原研究所,2020,234.
APA	Tripathee, Lekhendra.,Guo, Junming.,Kang, Shichang.,Paudyal, Rukumesh.,Sharma, Chhatra Mani.,...&Sillanpaa, Mika.(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, Lekhendra,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).