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DOI	10.1016/j.atmosres.2020.105376
	Water-soluble organic and inorganic nitrogen in ambient aerosols over the Himalayan middle hills: Seasonality, sources, and transport pathways
	Tripathee, Lekhendra; Kang, Shichang; Chen, Pengfei; Bhattarai, Hemraj; Guo, Junming; Shrestha, Kundan Lal; Sharma, Chhatra Mani; Ghimire, Prakriti Sharma; Huang, Jie
通讯作者	Kang, SC (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0169-8095
EISSN	1873-2895
卷号	250
英文摘要	Atmospheric nitrogen is ubiquitous in the environment and hence plays an essential role in the nutrient balance over the whole ecosystem. However, its abundance and characteristics, particularly in the Himalayas, are not well understood. Therefore, to understand the abundance, sources, and seasonality of soluble nitrogenous species in the middle hills of the central Himalayas, aerosol samples were collected at Dhulikhel in Nepal from January to December 2018. The results of this study revealed that water-soluble inorganic nitrogen (WSIN) contributed the most to water-soluble total nitrogen with an abundance of ammonium nitrogen (NH4+-N). Moreover, watersoluble organic nitrogen (WSON) contributed approximately 18% to aerosol total water-soluble nitrogen. The aerosol mass and WSIN species exhibited strong seasonality with considerably higher concentrations during dry periods and lower concentrations during the wet period. Furthermore, for dry periods, the HYSPLIT model revealed that nitrogen aerosols mainly originated from the Indo-Gangetic Plain region and were transported and deposited in the Himalayas through long-range atmospheric transport. The strong correlations of WSON with nss-K+ (biomass burning) and nss-Ca2+ (crustal sources) and lack of a significant correlation with SO42- indicated that primary sources are responsible for generating WSON rather than secondary processes in the Himalayas. The estimated dry deposition fluxes for NO3--N, NH4+-N, and WSON were 1.56, 8.35, and 4.06 kg ha(-1) y(-1), respectively. This study also shows that increasing air contaminants and emissions over South Asia can enter the Himalayas and affect the human health and ecology of this fragile area.
关键词	INDO-GANGETIC PLAIN ATMOSPHERIC NITROGEN STABLE CARBON ISOTOPIC COMPOSITION MARINE AEROSOLS DEPOSITION NEPAL PARTICLES CHEMISTRY PROGRESS
英文关键词	Water-soluble total nitrogen; Water-soluble organic nitrogen; Aerosol; Dry deposition; Himalayas
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000612174500005
来源期刊	ATMOSPHERIC RESEARCH
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254569
作者单位	[Tripathee, Lekhendra; Kang, Shichang; Chen, Pengfei; Guo, Junming; Ghimire, Prakriti Sharma] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China; [Kang, Shichang] CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100085, Peoples R China; [Huang, Jie] Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China; [Tripathee, Lekhendra; Bhattarai, Hemraj; Ghimire, Prakriti Sharma] Himalayan Environm Res Inst HERI, Kathmandu, Nepal; [Kang, Shichang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Shrestha, Kundan Lal] Kathmandu Univ, Dept Environm Sci & Engn, Dhulikhel, Nepal; [Sharma, Chhatra Mani] Tribhuvan Univ, Cent Dept Environm Sci, Kathmandu, Nepal; [Bhattarai, Hemraj] Chinese Univ Hong Kong, Earth Syst Sci Programme, Hong Kong, Peoples R China; [Bhattarai, Hemraj] Chinese Univ Hong Kong, Grad Div Earth & Atmospher Sci, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Tripathee, Lekhendra,Kang, Shichang,Chen, Pengfei,et al. Water-soluble organic and inorganic nitrogen in ambient aerosols over the Himalayan middle hills: Seasonality, sources, and transport pathways[J]. 中国科学院西北生态环境资源研究院,2021,250.
APA	Tripathee, Lekhendra.,Kang, Shichang.,Chen, Pengfei.,Bhattarai, Hemraj.,Guo, Junming.,...&Huang, Jie.(2021).Water-soluble organic and inorganic nitrogen in ambient aerosols over the Himalayan middle hills: Seasonality, sources, and transport pathways.ATMOSPHERIC RESEARCH,250.
MLA	Tripathee, Lekhendra,et al."Water-soluble organic and inorganic nitrogen in ambient aerosols over the Himalayan middle hills: Seasonality, sources, and transport pathways".ATMOSPHERIC RESEARCH 250(2021).