Nocturnal fine particulate nitrate formation by N2O5 heterogeneous chemistry in Seoul Metropolitan Area, Korea

Jo, Hyun‐Young; Lee, Hyo‐Jung; Jo, Yu‐Jin; Lee, Jong-Jae; Ban, Soo-Jin; Lee, Jin-Ju; Chang, Lim‐Seok; Heo, Gookyoung; Kim, Cheol‐Hee

doi:10.1016/j.atmosres.2019.03.028

Cited by 16 publications

(2 citation statements)

References 41 publications

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“…Meanwhile, the heterogeneous hydrolysis of N 2 O 5 were regarded as a main nitrate formation pathway in the North China Plain during the winter. 24 Heterogeneous N 2 O 5 uptake coefficients have been estimated in a semirural ground site in polluted southern China 25 and also Seoul Korea 26 and the concentration of N 2 O 5 implicated nitrate formation. 27 Consequently, N 2 O 5 hydrolysis on the aerosol surface cannot be omitted to the HNO 3 formation, contributing to the PM 2.5 formation.…”

Section: Introductionmentioning

confidence: 99%

Important Oxidants and Their Impact on the Environmental Effects of Aerosols

Tong

Wang

et al. 2021

J. Phys. Chem. A

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Oxidants are central species in the atmosphere, where they not only determine secondary particle formation but also impact human health and climate change. In general, they are unstable, highly reactive, and recyclable and have been studied in field observations, laboratory studies, and model simulations. The most widely investigated oxidants, such as OH radicals, O 3 , and Cl atom, HONO, NO 3 , N 2 O 5 , and Criegee Intermediates (CIs) have attracted more attention recently. Furthermore, secondary particles formed in the oxidations processes impact the particle physicochemical properties, such as hygroscopicity and optical properties and therefore impact the atmospheric radiation balance. Therefore, the newest investigation results of important oxidants (HONO, NO 3 , N 2 O 5 , and CIs) are reviewed in this manuscript, and the environmental effects of secondary particles formed through corresponding oxidation processes are also stated. Furthermore, some perspectives are further discussed in the article.

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Section: Introductionmentioning

confidence: 99%

Important Oxidants and Their Impact on the Environmental Effects of Aerosols

Tong

Wang

et al. 2021

J. Phys. Chem. A

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“…Air quality models are tools useful for characterizing the features of PM 2.5 and its relevant chemical composition over the area of interest, and they have been used for air quality forecasting, health and environmental impact assessments, and policy support [1,2]. However, a highly complicated bias is evident in PM 2.5 simulation, as the air quality is affected by many factors, such as local emissions, long-range transport of anthropogenic emissions from neighboring countries, meteorological interactions, chemical reactions, and sources of key precursors and processes, and others that are yet to be considered [3][4][5][6]. In addition, PM 2.5 is influenced by both secondary inorganic aerosol (SIA) and secondary organic aerosol (SOA) production.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of Simulated PM2.5 Concentrations over Northeast Asia to Different Secondary Organic Aerosol Modules during the KORUS-AQ Campaign

Lee

Song

et al. 2020

Atmosphere

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A numerical sensitivity study on secondary organic aerosol formation has been carried out by employing the WRF-Chem (Weather Research and Forecasting model coupled with Chemistry). Two secondary organic aerosol formation modules, the Modal Aerosol Dynamics model for Europe/Volatility Basis Set (MADE/VBS) and the Modal Aerosol Dynamics model for Europe/Secondary Organic Aerosol Model (MADE/SORGAM) were employed in the WRF-Chem model, and surface PM2.5 (particulate matter less than 2.5 μm in size) mass concentration and the composition of its relevant chemical sources, i.e., SO42−, NO3−, NH4+, and organic carbon (OC) were simulated during the Korea-United States Air Quality (KORUS-AQ) campaign period (1 May to 12 June 2016). We classified the KORUS-AQ period into two cases, the stagnant period (16–21 May) which was dominated by local emission and the long-range transport period (25–31 May) which was affected by transport from the leeward direction, and focused on the differences in OC secondary aerosol formation between two modules over Northeast Asia. The simulated surface PM2.5 chemical components via the two modules showed the largest systematic biases in surface OC, with a mean bias of 4.5 μg m−3, and the second largest in SO42− abundance of 2.2 μg m−3 over Seoul. Compared with surface observations at two ground sites located near the western coastal Korean Peninsula, MADE/VBS exhibited the overpredictions in OC by 170–180%, whereas MADE/SORGAM showed underpredictions by 49–65%. OC and sulfate via MADE/VBS were simulated to be much higher than that simulated by MADE/SORGAM by a factor of 2.8–3.5 and 1.5–1.9, respectively. Model verification against KORUS-AQ aircraft measurements also showed large discrepancies in simulated non-surface OC between the two modules by a factor of five, with higher OC by MADE/VBS and lower IC by MADE/SORGAM, whereas much closer MADE/VBS simulations to the KORUS-AQ aircraft measurements were found. On the basis of the aircraft measurements, the aggregated bias (sum of four components) for PM2.5 mass concentrations from the MADE/VBS module indicated that the simulation was much closer to the measurements, nevertheless more elaborate analysis on the surface OC simulation performance would be needed to improve the ground results. Our findings show that significant inconsistencies are present in the secondary organic aerosol formation simulations, suggesting that PM2.5 forecasts should be considered with great caution, as well as in the context of policymaking in the Northeast Asia region.

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Secondary aerosol formation drives atmospheric particulate matter pollution over megacities (Beijing and Seoul) in East Asia

Qiu

Man

et al. 2023

Atmospheric Environment

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Nocturnal fine particulate nitrate formation by N2O5 heterogeneous chemistry in Seoul Metropolitan Area, Korea

Cited by 16 publications

References 41 publications

Important Oxidants and Their Impact on the Environmental Effects of Aerosols

Important Oxidants and Their Impact on the Environmental Effects of Aerosols

Sensitivity of Simulated PM2.5 Concentrations over Northeast Asia to Different Secondary Organic Aerosol Modules during the KORUS-AQ Campaign

Secondary aerosol formation drives atmospheric particulate matter pollution over megacities (Beijing and Seoul) in East Asia

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