| PM2.5 composition and sources in the San Joaquin Valley of California: A long-term study using ToF-ACSM with the capture vaporizer | |
| Sun, Peng1,2; Farley, Ryan N.1; Li, Lijuan1,3; Srivastava, Deepchandra1; Niedek, Christopher R.1; Li, Jianjun1,3; Wang, Ningxin1; Cappa, Christopher D.4; Pusede, Sally E.5; Yu, Zhenhong6; Croteau, Philip6; Zhang, Qi1 | |
| Corresponding Author | Zhang, Qi(dkwzhang@ucdavis.edu) |
| 2022 | |
| Source Publication | ENVIRONMENTAL POLLUTION
 |
| ISSN | 0269-7491 |
| Volume | 292Pages:12 |
| Abstract | The San Joaquin Valley (SJV) of California has suffered persistent particulate matter (PM) pollution despite many years of control efforts. To further understand the chemical drivers of this problem and to support the development of State Implementation Plan for PM, a time-of-flight aerosol chemical speciation monitor (ToF-ACSM) outfitted with a PM2.5 lens and a capture vaporizer has been deployed at the Fresno-Garland air monitoring site of the California Air Resource Board (CARB) since Oct. 2018. The instrument measured non-refractory species in PM2.5 continuously at 10-min resolution. In this study, the data acquired from Oct. 2018 to May 2019 were analyzed to investigate the chemical characteristics, sources and atmospheric processes of PM2.5 in the SJV. Comparisons of the ToF-ACSM measurement with various co-located aerosol instruments show good agreements. The inter-comparisons indicated that PM2.5 in Fresno was dominated by submicron particles during the winter whereas refractory species accounted for a major fraction of PM2.5 mass during the autumn associated with elevated PM10 loadings. A rolling window positive matrix factorization analysis was applied to the organic aerosol (OA) mass spectra using the Multilinear Engine (ME-2) algorithm. Three distinct OA sources were identified, including vehicle emissions, local and regional biomass burning, and formation of oxygenated species. There were significant seasonal variations in PM2.5 composition and sources. During the winter, residential wood burning and oxidation of nitrogen oxides were major contributors to the occurrence of haze episodes with PM2.5 dominated by biomass burning OA and nitrate. In autumn, agricultural activities and wildfires were found to be the main cause of PM pollution. PM2.5 concentrations decreased significantly after spring and were dominated by oxygenated OA during March to May. Our results highlight the importance of using seasonally dependent control strategies to mitigate PM pollution in the SJV. |
| Keyword | Aerosol chemical speciation monitor (ACSM) Urban PM pollution Secondary inorganic and organic aerosols Biomass burning emissions Residential wood burning Wildfires |
| DOI | 10.1016/j.envpol.2021.118254 |
| WOS Keyword | CHEMICAL SPECIATION MONITOR ; POSITIVE MATRIX FACTORIZATION ; MASS SPECTROMETERS AMS ; ORGANIC AEROSOL ; SOURCE APPORTIONMENT ; PARTICULATE NITRATE ; MULTILINEAR ENGINE ; RIVER DELTA ; CHEMISTRY ; URBAN |
| Indexed By | SCI ; SCI |
| Language | 英语 |
| WOS Research Area | Environmental Sciences & Ecology |
| WOS Subject | Environmental Sciences |
| WOS ID | WOS:000711820800001 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ieecas.cn/handle/361006/17167 |
| Collection | 粉尘与环境研究室 |
| Corresponding Author | Zhang, Qi |
| Affiliation | 1.Univ Calif Davis, Dept Environm Toxicol, 1 Shields Ave, Davis, CA 95616 USA 2.Nanjing Univ, Sch Atmospher Sci, Joint Int Res Lab Atmospher & Earth Syst Sci, Nanjing 210023, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Peoples R China 4.Univ Calif Davis, Dept Civil & Environm Engn, 1 Shields Ave, Davis, CA 95616 USA 5.Univ Virginia, Dept Environm Sci, Charlottesville, VA 22904 USA 6.Aerodyne Res Inc, Billerica, MA USA |
| Recommended Citation GB/T 7714 | Sun, Peng,Farley, Ryan N.,Li, Lijuan,et al. PM2.5 composition and sources in the San Joaquin Valley of California: A long-term study using ToF-ACSM with the capture vaporizer[J]. ENVIRONMENTAL POLLUTION,2022,292:12. |
| APA | Sun, Peng.,Farley, Ryan N..,Li, Lijuan.,Srivastava, Deepchandra.,Niedek, Christopher R..,...&Zhang, Qi.(2022).PM2.5 composition and sources in the San Joaquin Valley of California: A long-term study using ToF-ACSM with the capture vaporizer.ENVIRONMENTAL POLLUTION,292,12. |
| MLA | Sun, Peng,et al."PM2.5 composition and sources in the San Joaquin Valley of California: A long-term study using ToF-ACSM with the capture vaporizer".ENVIRONMENTAL POLLUTION 292(2022):12. |
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