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学科主题: 地理学::自然地理学
题名: Organic molecular tracers in the atmospheric aerosols from Lumbini, Nepal, in the northern Indo-Gangetic Plain: influence of biomass burning
作者: Wan, X (Wan, Xin)1, 9; Kang, SC (Kang, Shichang)2, 8, 9; Li, QL (Li, Quanlian)2; Rupakheti, D (Rupakheti, Dipesh)1, 9; Zhang, QG (Zhang, Qianggong)1, 8; Guo, JM (Guo, Junming)1, 9; Chen, PF (Chen, Pengfei)2; Tripathee, L (Tripathee, Lekhendra)2; Rupakheti, M (Rupakheti, Maheswar)3, 4; Panday, AK (Panday, Arnico K.)5; Wang, W (Wang, Wu)6; Kawamura, K (Kawamura, Kimitaka)7; Gao, SP (Gao, Shaopeng)1; Wu, GM (Wu, Guangming)1, 9; Cong, ZY (Cong, Zhiyuan)1, 8
通讯作者: Cong, ZY ; Kang, SC
关键词: RIVER DELTA REGION ; CARBONACEOUS AEROSOLS ; ELEMENTAL CARBON ; TIBETAN PLATEAU ; BROWN CLOUDS ; SOUTH-ASIA ; MONOSACCHARIDE ANHYDRIDES ; DICARBOXYLIC-ACIDS ; SEASONAL-VARIATION ; SOURCE PROFILES
刊名: ATMOSPHERIC CHEMISTRY AND PHYSICS
发表日期: 2017
DOI: 10.5194/acp-17-8867-2017
卷: 17, 期:14, 页:8867-8885
收录类别: SCI
合作性质: 国际
文章类型: Article
类目[WOS]: Meteorology & Atmospheric Sciences
研究领域[WOS]: Meteorology & Atmospheric Sciences
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.
语种: 英语
WOS记录号: WOS:000406152300001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/8026
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China.
2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China.
3.IASS, D-14467 Potsdam, Germany.
4.Himalayan Sustainabil Inst HIMSI, Kathmandu, Nepal.
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.

Recommended Citation:
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.
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