气候变化领域集成服务门户(CCPortal): Influence of forest fires on the formation processes of low molecular weight dicarboxylic acids, ω-oxocarboxylic acids, pyruvic acid and α-dicarbonyls in springtime fine (PM2.5) aerosols over Southeast Asia

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DOI	10.1016/j.atmosenv.2020.118065
	Influence of forest fires on the formation processes of low molecular weight dicarboxylic acids, ω-oxocarboxylic acids, pyruvic acid and α-dicarbonyls in springtime fine (PM2.5) aerosols over Southeast Asia
	Boreddy S.K.R.; Parvin F.; Kawamura K.; Zhu C.; Lee C.-T.
发表日期	2021
ISSN	1352-2310
卷号	246
英文摘要	The present study reports on homologous series of dicarboxylic acids (C2–C12), ω-oxocarboxylic acids (ωC2-ωC9), pyruvic acid, and α-dicarbonyls (glyoxal and methylglyoxal) in near source biomass burning influenced (PM2.5) aerosols collected at Doi Ang Khang (DAK), Thailand, during an intense forest fire (March 1 to April 13, 2015) occurred in the vicinity of the sampling site over Southeast Asia (SEA). The molecular distributions of diacids were characterized by a predominance of oxalic (C2) acid followed by succinic (C4) and malonic (C3) acids. The abundance of maleic acid (M) was almost three times higher than that of fumaric acid (F). The observed lower values of C3/C4 (mean: 0.54), C2/C4 (4.45) and F/M ratios (0.33), indicating the limited photochemistry of organic aerosols at DAK and these ratios were comparable to those reported for biomass burning influenced aerosols (C3/C4: 0.51–0.66, C2/C4: ~4.0, and F/M: 0.2–0.35). Further, strong positive correlations (R2 > 0.80) were observed for diacids and related organic compounds with levoglucosan (LG, a unique tracer for biomass burning emission), suggesting that enhanced biomass burning associated with forest fires are major sources of diacids at DAK. This inference was further supported by the air mass back trajectories and MODIS (moderate resolution imaging spectroradiometer) derived fire spots over the study region. The formation pathway of C2 was largely linked to biomass burning derived precursor compounds as inferred from the correlation coefficient matrix analysis. We also found that C3/C4 and C2/C4 ratios were negatively correlated with LG, although they have strongly correlated each other. This inference suggests that biomass burning affect not only the concentration levels of organic aerosols but also their formation processes in the atmosphere. The present study demonstrates that intensive biomass burning during forest fires in SEA largely control the levels of carbonaceous aerosols and seriously affect the climate in the outflow regions. © 2020 Elsevier Ltd
关键词	Biomass burning Dicarboxylic acids Levoglucosan PM2.5 Southeast asia
语种	英语
scopus关键词	Aerosols; Biomass; Deforestation; Fire hazards; Fires; Radiometers; Air mass back trajectories; Biomass burning emissions; Carbonaceous aerosol; Correlation coefficient; Low molecular weight; Moderate resolution imaging spectroradiometer; Molecular distribution; Positive correlations; Oxalic acid; carbromal; dicarboxylic acid; fumaric acid; glyoxylic acid; levoglucosan; maleic acid; organic compound; phthalic acid; pyruvic acid; aerosol; air mass; air sampling; biomass burning; carboxylic acid; forest fire; MODIS; molecular analysis; particulate matter; aerosol; agricultural land; agricultural waste; biomass production; burn; climate change; controlled study; correlation coefficient; flow rate; forest fire; molecular weight; photochemistry; PM2.5 exposure; priority journal; Southeast Asia; Thailand; Thailand
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248721
作者单位	Institute of Low Temperature Science, Hokkaido University, Sapporo, 060-0810, Japan; Chubu Institute for Advanced Studies, Chubu University, Kasugai, 487-8501, Japan; Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, 2360001, Japan; Graduate Institute of Environmental Engineering, National Central University, Taoyuan, 32001, Taiwan
推荐引用方式 GB/T 7714	Boreddy S.K.R.,Parvin F.,Kawamura K.,et al. Influence of forest fires on the formation processes of low molecular weight dicarboxylic acids, ω-oxocarboxylic acids, pyruvic acid and α-dicarbonyls in springtime fine (PM2.5) aerosols over Southeast Asia[J],2021,246.
APA	Boreddy S.K.R.,Parvin F.,Kawamura K.,Zhu C.,&Lee C.-T..(2021).Influence of forest fires on the formation processes of low molecular weight dicarboxylic acids, ω-oxocarboxylic acids, pyruvic acid and α-dicarbonyls in springtime fine (PM2.5) aerosols over Southeast Asia.ATMOSPHERIC ENVIRONMENT,246.
MLA	Boreddy S.K.R.,et al."Influence of forest fires on the formation processes of low molecular weight dicarboxylic acids, ω-oxocarboxylic acids, pyruvic acid and α-dicarbonyls in springtime fine (PM2.5) aerosols over Southeast Asia".ATMOSPHERIC ENVIRONMENT 246(2021).