Wintertime organic and inorganic aerosols in Lanzhou, China: sources, processes, and comparison with the results during summer

被引：84

作者：

Xu, Jianzhong ^{[1
]}

Shi, Jinsen ^{[2
]}

Zhang, Qi ^{[3
]}

Ge, Xinlei ^{[4
]}

Canonaco, Francesco ^{[5
]}

Prevot, Andre S. H. ^{[5
,6
,7
]}

Vonwiller, Matthias ^{[8
,9
]}

Szidat, Sonke ^{[8
,9
]}

Ge, Jinming

Ma, Jianmin ^{[2
,10
]}

An, Yanqing ^{[1
]}

Kang, Shichang ^{[1
]}

Qin, Dahe ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Cryospher Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China

[2] Lanzhou Univ, Coll Atmospher Sci, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou 730000, Peoples R China

[3] Univ Calif Davis, Dept Environm Toxicol, Davis, CA 95616 USA

[4] Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing 210044, Jiangsu, Peoples R China

[5] Paul Scherrer Inst, Lab Atmospher Chem, CH-5232 Villigen, Switzerland

[6] Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China

[7] Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710075, Peoples R China

[8] Univ Bern, Dept Chem & Biochem, CH-3012 Bern, Switzerland

[9] Univ Bern, Oeschger Ctr Climate Change Res, CH-3012 Bern, Switzerland

[10] Lanzhou Univ, Coll Earth Environm Sci, Lanzhou 730000, Peoples R China

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2016年 / 16卷 / 23期

基金：

中国国家自然科学基金;

关键词：

POLYCYCLIC AROMATIC-HYDROCARBONS; POSITIVE MATRIX FACTORIZATION; YANGTZE-RIVER DELTA; SOURCE APPORTIONMENT; HIGH-RESOLUTION; CHEMICAL-COMPOSITION; SUBMICRON AEROSOLS; PARTICULATE MATTER; MASS-SPECTROMETRY; AIR-POLLUTANTS;

D O I：

10.5194/acp-16-14937-2016

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

One of the OOAs was less oxidized (LO-OOA), and the other one more oxidized (MO-OOA). LO-OOA was the most abundant OA component (22.3% of OA mass), followed by CCOA (22.0 %), COA (20.2 %), MO-OOA (14.9 %), BBOA (10.8 %), and HOA (9.8 %). The mass fraction of primary OA (= HOA + BBOA + COA + CCOA) increased during high PM pollution periods, indicating that local primary emissions were a main reason for the formation of air pollution events in Lanzhou during winter. Radiocarbon (C-14) measurement was conducted on four PM2.5 filter samples from this study, which allowed for a quantitative source apportionment of organic carbon (OC). The non-fossil sources on average accounted for 55 +/- 3% of OC, which could be mainly from biomass burning and cooking activities, suggesting the importance of non-fossil sources for the PM pollution in Lanzhou. Together with the PMF results, we also found that a large fraction (66 +/- 10 %) of the secondary OC was from non-fossil OC.

引用

页码：14937 / 14957

页数：21

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