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| Hauptseite > Publikationsdatenbank > Direct evidence of local photochemical production driven ozone episode in Beijing: A case study > print |
| Hauptseite > Publikationsdatenbank > Direct evidence of local photochemical production driven ozone episode in Beijing: A case study > print |
| 001 | 902384 | ||
| 005 | 20240709081834.0 | ||
| 024 | 7 | _ | |a 10.1016/j.scitotenv.2021.148868 |2 doi |
| 024 | 7 | _ | |a 0048-9697 |2 ISSN |
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| 037 | _ | _ | |a FZJ-2021-04218 |
| 082 | _ | _ | |a 610 |
| 100 | 1 | _ | |a Tan, Zhaofeng |0 P:(DE-Juel1)173726 |b 0 |u fzj |
| 245 | _ | _ | |a Direct evidence of local photochemical production driven ozone episode in Beijing: A case study |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2021 |b Elsevier Science |
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| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a We present a comprehensive field campaign conducted in Beijing, September 2016, to elucidate the photochemical smog pollution, i.e. Ozone (O3). The observed daily maximum hydroxyl radical (OH) and hydroperoxy radical (HO2) concentrations were up to 1 × 107 cm-3 and 6 × 108 cm-3, respectively, indicating the active photochemistry in autumn Beijing. Photolysis of nitrous acid (HONO) and O3 contributed 1-2 ppbv h-1 to OH primary production during daytime. OH termination were dominated by the reaction with nitric oxide (NO) and nitrogen dioxide (NO2), which were in general larger than primary production rates, indicating other primary radical sources maybe important. The measurement of radicals facilitates the direct determination of local ozone production rate P (Ox) (Ox = O3 + NO2). The integrated P(Ox) reached 75 ppbv in afternoon (for 4 h) when planetary boundary layer was well developed. At the same time period, the observed total oxidant concentrations Ox, increased significantly by 70 ppbv. In addition, the Ox measurement showed compact increase in 12 stations both temporally and spatially in Beijing, indicating that active photochemical production happened homogenously throughout the city. The back-trajectory analysis showed that Beijing was isolated from the other cities during the episode, which further proved that the fast ozone pollution was contributed by local photochemical production rather than regional advection. |
| 536 | _ | _ | |a 2111 - Air Quality (POF4-211) |0 G:(DE-HGF)POF4-2111 |c POF4-211 |f POF IV |x 0 |
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| 700 | 1 | _ | |a Ma, Xuefei |0 P:(DE-Juel1)168298 |b 1 |
| 700 | 1 | _ | |a Lu, Keding |0 P:(DE-Juel1)6776 |b 2 |e Corresponding author |
| 700 | 1 | _ | |a Jiang, Meiqing |0 P:(DE-HGF)0 |b 3 |
| 700 | 1 | _ | |a Zou, Qi |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Wang, Haichao |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Zeng, Limin |0 P:(DE-HGF)0 |b 6 |
| 700 | 1 | _ | |a Zhang, Yuanhang |0 P:(DE-HGF)0 |b 7 |e Corresponding author |
| 773 | _ | _ | |a 10.1016/j.scitotenv.2021.148868 |g Vol. 800, p. 148868 - |0 PERI:(DE-600)1498726-0 |p 148868 - |t The science of the total environment |v 800 |y 2021 |x 0048-9697 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/902384/files/Tan%20ScienceTotalEniviron%202021.pdf |y Published on 2021-08-05. Available in OpenAccess from 2023-08-05. |
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