Organic molecular tracers in the atmospheric aerosols from Lumbini, Nepal, in the northern Indo-Gangetic Plain: influence of biomass burning

doi:10.5194/acp-17-8867-2017

	Organic molecular tracers in the atmospheric aerosols from Lumbini, Nepal, in the northern Indo-Gangetic Plain: influence of biomass burning
	Wan, X (Wan, Xin)4,9; Kang, SC (Kang, Shichang)2,8,9; Li, QL (Li, Quanlian)2; Rupakheti, D (Rupakheti, Dipesh)4,9; Zhang, QG (Zhang, Qianggong)4,8; Guo, JM (Guo, Junming)4,9; Chen, PF (Chen, Pengfei)2; Tripathee, L (Tripathee, Lekhendra)2; Rupakheti, M (Rupakheti, Maheswar)1,3; Panday, AK (Panday, Arnico K.)5
刊名	ATMOSPHERIC CHEMISTRY AND PHYSICS
	2017
卷号	17 期号:14 页码:8867-8885
关键词	River Delta Region Carbonaceous Aerosols Elemental Carbon Tibetan Plateau Brown Clouds South-asia Monosaccharide Anhydrides Dicarboxylic-acids Seasonal-variation Source Profiles
DOI	10.5194/acp-17-8867-2017
文献子类	Article
英文摘要	To better understand the characteristics of biomass burning in the northern Indo-Gangetic Plain (IGP), total suspended particles were collected in a rural site, Lumbini, Nepal, during April 2013 to March 2014 and analyzed for the biomass burning tracers (i.e., levoglucosan, mannosan, vanillic acid). The annual average concentration of levoglucosan was 734 +/- 1043 ng m(-3) with the maximum seasonal mean concentration during post-monsoon season (2206 +/- 1753 ng m(-3)), followed by winter (1161 +/- 1347 ng m(3)), pre-monsoon (771 +/- 524 ng m(-3)) and minimum concentration during monsoon season (212 +/- 279 ng m(-3)). The other biomass burning tracers (mannosan, galactosan, p-hydroxybenzoic acid, vanillic acid, syringic acid and dehydroabietic acid) also showed the similar seasonal variations. There were good correlations among levoglucosan, organic carbon (OC) and elemental carbon (EC), indicating significant impact of biomass burning activities on carbonaceous aerosol loading throughout the year in Lumbini area. According to the characteristic ratios, levoglucosan / mannosan (lev / man) and syringic acid / vanillic acid (syr / van), we deduced that the high abundances of biomass burning products during nonmonsoon seasons were mainly caused by the burning of crop residues and hardwood while the softwood had less contribution. Based on the diagnostic tracer ratio (i.e., lev / OC), the OC derived from biomass burning constituted large fraction of total OC, especially during post-monsoon season. By analyzing the MODIS fire spot product and 5-day airmass back trajectories, we further demonstrated that organic aerosol composition was not only related to the local agricultural activities and residential biomass usage but also impacted by the regional emissions. During the post-monsoon season, the emissions from rice residue burning in western India and eastern Pakistan could impact particulate air pollution in Lumbini and surrounding regions in southern Nepal. Therefore, our finding is meaningful and has a great importance for adopting the appropriate mitigation measures, not only at the local level but also by involving different regions and nations, to reduce the biomass burning emissions in the broader IGP region nations.
学科主题	自然地理学
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
WOS记录号	WOS:000406152300001
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/8026]
专题	青藏高原研究所_图书馆
通讯作者	Cong, ZY; Kang, SC
作者单位	1.IASS, D-14467 Potsdam, Germany. 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China. 3.Himalayan Sustainabil Inst HIMSI, Kathmandu, Nepal. 4.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China. 5.Int Ctr Integrated Mt Dev ICIMOD, Kathmandu, Nepal. 6.Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China. 7.Chubu Univ, Chubu Inst Adv Studies, Kasugai, Aichi 4878501, Japan. 8.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100085, Peoples R China. 9.Univ Chinese Acad Sci, Beijing 100039, Peoples R China.
推荐引用方式 GB/T 7714	Wan, X ,Kang, SC ,Li, QL ,et al. Organic molecular tracers in the atmospheric aerosols from Lumbini, Nepal, in the northern Indo-Gangetic Plain: influence of biomass burning[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(14):8867-8885.
APA	Wan, X .,Kang, SC .,Li, QL .,Rupakheti, D .,Zhang, QG .,...&Kang, SC.(2017).Organic molecular tracers in the atmospheric aerosols from Lumbini, Nepal, in the northern Indo-Gangetic Plain: influence of biomass burning.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(14),8867-8885.
MLA	Wan, X ,et al."Organic molecular tracers in the atmospheric aerosols from Lumbini, Nepal, in the northern Indo-Gangetic Plain: influence of biomass burning".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.14(2017):8867-8885.