气候变化领域集成服务门户(CCPortal): Organic aerosol compositions and source estimation by molecular tracers in Dushanbe, Tajikistan

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DOI	10.1016/j.envpol.2022.119055
	Organic aerosol compositions and source estimation by molecular tracers in Dushanbe, Tajikistan
	Chen, Pengfei; Kang, Shichang; Zhang, Lanxin; Abdullaev, Sabur F.; Wan, Xin; Zheng, Huijun; Maslov, Vladimir A.; Uulu, Salamat Abdyzhapar; Safarov, Mustafo S.; Tripathee, Lekhendra; Li, Chaoliu
通讯作者	Kang, SC (通讯作者)
发表日期	2022
ISSN	0269-7491
EISSN	1873-6424
卷号	302
英文摘要	To elucidate the molecular composition and sources of organic aerosols in Central Asia, carbonaceous compounds, major ions, and 15 organic molecular tracers of total suspended particulates (TSP) were analyzed from September 2018 to August 2019 in Dushanbe, Tajikistan. Extremely high TSP concentrations (annual mean +/-& nbsp; std: 211 +/- 131 mu gm(-3)) were observed, particularly during summer (seasonal mean +/- std: 333 +/- 183 mu g m(- 3)). Organic carbon (OC: 11.9 +/- 7.0 mu gm(-3)) and elemental carbon (EC: 5.1 +/- 2.2 mu gm(-3)) exhibited distinct seasonal variations from TSP, with the highest values occurring in winter. A high concentration of Ca2+ was observed (11.9 +/- 9.2 mu g m(-3)), accounting for 50.8% of the total ions and reflecting the considerable influence of dust on aerosols. Among the measured organic molecular tracers, levoglucosan was the predominant compound (632 +/- 770 ng m(-3)), and its concentration correlated significantly with OC and EC during the study period. These findings highlight biomass burning (BB) as an important contributor to the particulate air pollution in Dushanbe. High ratios of levoglucosan to mannosan, and syringic acid to vanillic acid suggest that mixed hardwood and herbaceous plants were the main burning materials in the area, with softwood being a minor one. According to the diagnostic tracer ratio, OC derived from BB constituted a large fraction of the primary OC (POC) in ambient aerosols, accounting for an annual mean of nearly 30% and reaching 63% in winter. The annual contribution of fungal spores to POC was 10%, with a maximum of 16% in spring. Measurements of plant debris, accounting for 3% of POC, divulged that these have the same variation as fungal spores.
关键词	TIBETAN PLATEAU CONCENTRATIONS BIOMASS BURNING EMISSIONS ATMOSPHERIC AEROSOLS CARBONACEOUS AEROSOLS CHEMICAL-COMPOSITION INORGANIC-IONS SEASONAL-VARIATIONS PARTICULATE MATTER DICARBOXYLIC-ACIDS CRYOSPHERIC CHANGE
英文关键词	Carbonaceous aerosol; Organic molecular tracers; Levoglucosan; Source apportionment; Central Asia
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000783128100001
来源期刊	ENVIRONMENTAL POLLUTION
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260747
推荐引用方式 GB/T 7714	Chen, Pengfei,Kang, Shichang,Zhang, Lanxin,et al. Organic aerosol compositions and source estimation by molecular tracers in Dushanbe, Tajikistan[J]. 中国科学院青藏高原研究所,2022,302.
APA	Chen, Pengfei.,Kang, Shichang.,Zhang, Lanxin.,Abdullaev, Sabur F..,Wan, Xin.,...&Li, Chaoliu.(2022).Organic aerosol compositions and source estimation by molecular tracers in Dushanbe, Tajikistan.ENVIRONMENTAL POLLUTION,302.
MLA	Chen, Pengfei,et al."Organic aerosol compositions and source estimation by molecular tracers in Dushanbe, Tajikistan".ENVIRONMENTAL POLLUTION 302(2022).