Investigation of OH-reactivity budget in the isoprene, α-pinene and m-xylene oxidation with OH under high NOx conditions

Sakamoto, Yosuke; Kohno, Nanase; Ramasamy, Sathiyamurthi; Sato, Kei; Morino, Yu; Kajii, Yoshizumi

doi:10.1016/j.atmosenv.2021.118916

Cited by 8 publications

(7 citation statements)

References 43 publications

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“…They also found that BVOC-derived secondary products were less important for missing OH reactivity than those from aromatics in the same condition. 46 Moreover, their findings establish the importance of aromatic-and BVOC-derived products when investigating missing OH reactivity; however, only a weak similarity of the spatial distributions between pinene and missing OH reactivity was observed in our study. Figure S4 shows the spatial distributions of H 2 , isoprene, and aromatics, in which isoprene showed an identical trend as temperature (or solar radiation).…”

mentioning

confidence: 41%

Section: Resultsmentioning

confidence: 99%

“…Sakamoto et al reported that aromatic-derived secondary products could double the productivity of OH reactivity due to VOC oxidation in a chamber-based observation. They also found that BVOC-derived secondary products were less important for missing OH reactivity than those from aromatics in the same condition . Moreover, their findings establish the importance of aromatic- and BVOC-derived products when investigating missing OH reactivity; however, only a weak similarity of the spatial distributions between pinene and missing OH reactivity was observed in our study.…”

Section: Resultsmentioning

confidence: 99%

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Potential Factors Contributing to Ozone Production in AQUAS–Kyoto Campaign in Summer 2020: Natural Source-Related Missing OH Reactivity and Heterogeneous HO₂/RO₂ Loss

Kohno

Sakamoto

et al. 2022

Environ. Sci. Technol.

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This study presents total OH reactivity, ancillary trace species, HO 2 reactivity, and complex isoprene-derived RO 2 reactivity due to ambient aerosols measured during the air quality study (AQUAS)−Kyoto campaign in September, 2020. Observations were conducted during the coronavirus disease (COVID-19) pandemic (associated with reduced anthropogenic emissions). The spatial distribution of missing OH reactivity highlights that the origin of volatile organic compounds (VOCs) may be from natural-emission areas. For the first time, the real-time loss rates of HO 2 and RO 2 onto ambient aerosols were measured continuously and alternately. Ozone production sensitivity was investigated considering unknown trace species and heterogeneous loss effects of XO 2 (�HO 2 + RO 2 ) radicals. Missing OH reactivity enhanced the ozone production potential by a factor of 2.5 on average. Heterogeneous loss of radicals could markedly suppress ozone production under low NO/NO x conditions with slow gas-phase reactions of radicals and change the ozone regime from VOC-to NO x -sensitive conditions. This study quantifies the relationship of missing OH reactivity and aerosol uptake of radicals with ozone production in Kyoto, a low-emission suburban area. The result has implications for future NO x -reduction policies. Further studies may benefit from the combination of chemical transport models and inverse modeling over a wide spatiotemporal range.

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confidence: 41%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Potential Factors Contributing to Ozone Production in AQUAS–Kyoto Campaign in Summer 2020: Natural Source-Related Missing OH Reactivity and Heterogeneous HO₂/RO₂ Loss

Kohno

Sakamoto

et al. 2022

Environ. Sci. Technol.

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“…As a result, these products were transported downwind by the surface easterly and southerly winds (Figure S10), and the eventual ozone formation was spatially displaced and lagged behind the initial oxidation of isoprene for several hours. In contrast, the photochemical production of ozone from highly reactive alkenes (e.g., propene) and aromatics (e.g., m -xylenes) began immediately after the initial oxidation of these precursors . This difference in the ozone production time scales from reactive AVOCs and from isoprene is consistent with evidence from chamber experiments.…”

Section: Resultsmentioning

confidence: 88%

“…In contrast, the photochemical production of ozone from highly reactive alkenes (e.g., propene) and aromatics (e.g., m-xylenes) began immediately after the initial oxidation of these precursors. 54 This difference in the ozone production time scales from reactive AVOCs and from isoprene is consistent with evidence from chamber experiments. Compared to BVOCs, temperature-dependent AVOC emissions have a more localized impact on surface ozone.…”

Section: Simulated Responses Of Surface Ozone Tomentioning

confidence: 99%

Temperature-Dependent Evaporative Anthropogenic VOC Emissions Significantly Exacerbate Regional Ozone Pollution

Wu,

Fu,

Arnold

et al. 2024

Environ. Sci. Technol.

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The evaporative emissions of anthropogenic volatile organic compounds (AVOCs) are sensitive to ambient temperature. This sensitivity forms an air pollution-meteorology connection that has not been assessed on a regional scale. We parametrized the temperature dependence of evaporative AVOC fluxes in a regional air quality model and evaluated the impacts on surface ozone in the Beijing−Tianjin−Hebei (BTH) area of China during the summer of 2017. The temperature dependency of AVOC emissions drove an enhanced simulated ozone-temperature sensitivity of 1.0 to 1.8 μg m −3 K −1 , comparable to the simulated ozone-temperature sensitivity driven by the temperature dependency of biogenic VOC emissions (1.7 to 2.4 μg m −3 K −1 ). Ozone enhancements driven by temperature-induced AVOC increases were localized to their point of emission and were relatively more important in urban areas than in rural regions. The inclusion of the temperature-dependent AVOC emissions in our model improved the simulated ozone-temperature sensitivities on days of ozone exceedance. Our results demonstrated the importance of temperature-dependent AVOC emissions on surface ozone pollution and its heretofore unrepresented role in air pollution−meteorology interactions.

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Direct evaluation of the ozone production regime in smog chamber experiments

Morino

Sadanaga²,

Sato

et al. 2023

Atmospheric Environment

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Investigation of OH-reactivity budget in the isoprene, α-pinene and m-xylene oxidation with OH under high NOx conditions

Cited by 8 publications

References 43 publications

Potential Factors Contributing to Ozone Production in AQUAS–Kyoto Campaign in Summer 2020: Natural Source-Related Missing OH Reactivity and Heterogeneous HO₂/RO₂ Loss

Potential Factors Contributing to Ozone Production in AQUAS–Kyoto Campaign in Summer 2020: Natural Source-Related Missing OH Reactivity and Heterogeneous HO₂/RO₂ Loss

Temperature-Dependent Evaporative Anthropogenic VOC Emissions Significantly Exacerbate Regional Ozone Pollution

Direct evaluation of the ozone production regime in smog chamber experiments

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Investigation of OH-reactivity budget in the isoprene, α-pinene and m-xylene oxidation with OH under high NOx conditions

Cited by 8 publications

References 43 publications

Potential Factors Contributing to Ozone Production in AQUAS–Kyoto Campaign in Summer 2020: Natural Source-Related Missing OH Reactivity and Heterogeneous HO2/RO2 Loss

Potential Factors Contributing to Ozone Production in AQUAS–Kyoto Campaign in Summer 2020: Natural Source-Related Missing OH Reactivity and Heterogeneous HO2/RO2 Loss

Temperature-Dependent Evaporative Anthropogenic VOC Emissions Significantly Exacerbate Regional Ozone Pollution

Direct evaluation of the ozone production regime in smog chamber experiments

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Product

Resources

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Potential Factors Contributing to Ozone Production in AQUAS–Kyoto Campaign in Summer 2020: Natural Source-Related Missing OH Reactivity and Heterogeneous HO₂/RO₂ Loss

Potential Factors Contributing to Ozone Production in AQUAS–Kyoto Campaign in Summer 2020: Natural Source-Related Missing OH Reactivity and Heterogeneous HO₂/RO₂ Loss