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学科主题: 地理学::自然地理学
题名: Chemical characteristics of soluble aerosols over the central Himalayas: insights into spatiotemporal variations and sources
作者: Tripathee, L (Tripathee, Lekhendra)1, 2; Kang, SC (Kang, Shichang)1, 3; Rupakheti, D (Rupakheti, Dipesh)4; Cong, ZY (Cong, Zhiyuan)3, 4; Zhang, QG (Zhang, Qianggong)3, 4; Huang, J (Huang, Jie)4
通讯作者: Tripathee, L ; Kang, SC
关键词: SOUTHEASTERN TIBETAN PLATEAU ; ATMOSPHERIC BROWN CLOUDS ; SUMMER MONSOON SEASON ; HIGH-ALTITUDE SITE ; IONIC COMPOSITION ; MINERAL DUST ; CARBONACEOUS AEROSOLS ; PARTICULATE MATTER ; WET PRECIPITATION ; SIZE DISTRIBUTION
刊名: ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
发表日期: 2017
DOI: 10.1007/s11356-017-0077-0
卷: 24, 期:31, 页:24454-24472
收录类别: SCI
合作性质: 国际
文章类型: Article
类目[WOS]: Environmental Sciences ; Environmental Sciences & Ecology
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: In order to investigate the spatial and temporal variations of aerosols and its soluble chemical compositions of the data gap zone in the central Himalayan region, aerosol samples were collected at four sites. The sampling location were characterized by four different categories, such as urban (Bode), semiurban site in the northern Indo-Gangetic Plain (Lumbini), rural (Dhunche), and semiarid rural (Jomsom). A total of 230 aerosol samples were collected from four representative sites for a yearlong period and analyzed for water-soluble inorganic ions (WSIIs). The annual average aerosol mass concentration followed the sequence as Bode (238.24 +/- 162.24 mu g/m(3))> Lumbini (161.14 +/- 105.95 mu g/m(3))> Dhunche (112.40 +/- 40.30 mu g/m(3))> Jomsom (78.85 +/- 34.28 mu g/m(3)), suggesting heavier particulate pollution in the urban and semi-urban sites. The total soluble ions contributed to 12.61-28.19% of TSP aerosol mass. The results revealed that SO42- and NO3- were the major anion and Ca2+ and NH4+ were the major cation influencing the aerosol composition over the central Himalayas. Calcium played a major role in neutralizing aerosol acidity followed by NH4+ at all the sites. The major compound of aerosol was (NH4)(2)SO4 and NH4HSO4 in the central Himalayas. Clear seasonality was observed at three observation sites, with higher concentrations during non-monsoon (dry periods) and lower during monsoon (wet period), suggesting washing out of aerosol particles by heavy precipitation during monsoon. In contrast, semiarid sites did not show the clear seasonal trend due to limited precipitation. Stationary sources were predominant over the mobile sources mostly in the remote sites. Principal component analysis confirmed that the major sources of WSIIs in the region were industrial emissions, fossil fuel and biomass burning, and crustal fugitive dusts. Nevertheless, transboundary aerosol transport over the region from polluted cities from south Asia could not be ignored as indicated by the clusters of air mass backward trajectory analysis.
语种: 英语
WOS记录号: WOS:000413649700036
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7957
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China.
2.Himalayan Environm Res Inst HERI, Kathmandu, Nepal.
3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China.
4.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China.

Recommended Citation:
Tripathee, L ,Kang, SC ,Rupakheti, D ,et al. Chemical characteristics of soluble aerosols over the central Himalayas: insights into spatiotemporal variations and sources[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2017,24(31):24454-24472.
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