气候变化领域集成服务门户(CCPortal): Nitrogenous and carbonaceous aerosols in PM 2.5 and TSP during pre-monsoon: Characteristics and sources in the highly polluted mountain valley

CCPortal

DOI	10.1016/j.jes.2021.06.0181001-0742
	Nitrogenous and carbonaceous aerosols in PM 2.5 and TSP during pre-monsoon: Characteristics and sources in the highly polluted mountain valley
	Bhattarai, Hemraj; Tripathee, Lekhendra; Kang, Shichang; Chen, Pengfei; Sharma, Chhatra Mani; Ram, Kirpa; Guo, Junming; Rupakheti, Maheswar
通讯作者	Tripathee, L (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China. ; Tripathee, L (通讯作者)，Himalayan Environm Res Inst HERI, Kathmandu 44602, Nepal.
发表日期	2022
ISSN	1001-0742
EISSN	1878-7320
起始页码	10
结束页码	24
卷号	115
英文摘要	This study reports for the first time a comprehensive analysis of nitrogenous and carbonaceous aerosols in simultaneously collected PM 2.5 and TSP during pre-monsoon (March-May 2018) from a highly polluted urban Kathmandu Valley (KV) of the Himalayan foothills. The mean mass concentration of PM 2.5 (129.8 mu g/m 3 ) was only tilde 25% of TSP mass (558.7 mu g/ m 3 ) indicating the dominance of coarser mode aerosols. However, the mean concentration as well as fractional contributions of water-soluble total nitrogen (WSTN) and carbonaceous species reveal their predominance in find-mode aerosols. The mean mass concentration of WSTN was 17.43 +4.70 mu g/m 3 (14%) in PM 2.5 and 24.64 +8.07 mu g/m 3 (5%) in TSP. Moreover, the fractional contribution of total carbonaceous aerosols (TCA) is much higher in PM 2.5 ( tilde 34%) than that in TSP ( tilde 20%). The relatively low OC/EC ratio in PM 2.5 (3.03 + 1.47) and TSP (4.64 + 1.73) suggests fossil fuel combustion as the major sources of carbonaceous aerosols with contributions from secondary organic aerosols. Five-day air mass back trajectories simulated with the HYSPLIT model, together with MODIS fire counts indicate the influence of local emissions as well as transported pollutants from the Indo-Gangetic Plain region to the south of the Himalayan foothills. Principal component analysis (PCA) also suggests a mixed contribution from other local anthropogenic, biomass burning, and crustal sources. Our results highlight that it is necessary to control local emissions as well as regional transport while designing mitigation measures to reduce the KV's air pollution. (c) 2021 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
关键词	INDO-GANGETIC PLAIN KATHMANDU VALLEY CHEMICAL-COMPOSITION ATMOSPHERIC AEROSOLS PARTICULATE MATTER CENTRAL HIMALAYAS WET DEPOSITION ORGANIC-CARBON SURFACE OZONE MINERAL DUST
英文关键词	Nitrogenous aerosol; Carbonaceous aerosols; Major ions; Particulate pollution; Kathmandu Valley (KV)
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000740441100002
来源期刊	JOURNAL OF ENVIRONMENTAL SCIENCES
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/254361
作者单位	[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; [Tripathee, Lekhendra; Kang, Shichang; Chen, Pengfei; Guo, Junming] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China; [Kang, Shichang] Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China; [Kang, Shichang] CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100085, Peoples R China; [Bhattarai, Hemraj; Tripathee, Lekhendra; Sharma, Chhatra Mani] Himalayan Environm Res Inst HERI, Kathmandu 44602, Nepal; [Sharma, Chhatra Mani] Tribhuvan Univ, Cent Dept Environm Sci, Kathmandu 44613, Nepal; [Ram, Kirpa] Banaras Hindu Univ, Inst Environm & Sustainable Dev, Varanasi 221005, Uttar Pradesh, India; [Rupakheti, Maheswar] Inst Adv Sustainabil Studies, D-14467 Potsdam, Germany
推荐引用方式 GB/T 7714	Bhattarai, Hemraj,Tripathee, Lekhendra,Kang, Shichang,et al. Nitrogenous and carbonaceous aerosols in PM 2.5 and TSP during pre-monsoon: Characteristics and sources in the highly polluted mountain valley[J]. 中国科学院西北生态环境资源研究院,2022,115.
APA	Bhattarai, Hemraj.,Tripathee, Lekhendra.,Kang, Shichang.,Chen, Pengfei.,Sharma, Chhatra Mani.,...&Rupakheti, Maheswar.(2022).Nitrogenous and carbonaceous aerosols in PM 2.5 and TSP during pre-monsoon: Characteristics and sources in the highly polluted mountain valley.JOURNAL OF ENVIRONMENTAL SCIENCES,115.
MLA	Bhattarai, Hemraj,et al."Nitrogenous and carbonaceous aerosols in PM 2.5 and TSP during pre-monsoon: Characteristics and sources in the highly polluted mountain valley".JOURNAL OF ENVIRONMENTAL SCIENCES 115(2022).