Examining TROPOMI formaldehyde to nitrogen dioxide ratios in the Lake Michigan region: implications for ozone exceedances by J. J. M. Acdan, R. B. Pierce, R. B. Pierce, A. F. Dickens, Z. Adelman, T. Nergui

“…<p>Surface-level ozone (<span class="inline-formula">O₃</span>) is a secondary air pollutant that has adverse effects on human health. …”
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European NO_<i>x</i> emissions in WRF-Chem derived from OMI: impacts on summertime surface ozone by A. J. Visser, K. F. Boersma, K. F. Boersma, L. N. Ganzeveld, M. C. Krol, M. C. Krol

“…<p>Ozone (<span class="inline-formula">O₃</span>) is a secondary air pollutant that negatively affects human and ecosystem health. …”
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Exploring the drivers of the increased ozone production in Beijing in summertime during 2005–2016 by W. Wang, D. D. Parrish, X. Li, X. Li, X. Li, M. Shao, M. Shao, Y. Liu, Z. Mo, S. Lu, M. Hu, X. Fang, Y. Wu, Y. Wu, L. Zeng, Y. Zhang

“…Therefore, the influence of PM<span class="inline-formula">_2.5</span> on actinic flux and thus on the rate of oxidation of VOCs and <span class="inline-formula">NO_<i>x</i></span> to ozone and to secondary aerosol (i.e., the major contributor to PM<span class="inline-formula">_2.5)</span> is important for determining the atmospheric effects of controlling the emissions of the common precursors of PM<span class="inline-formula">_2.5</span> and ozone when attempting to control these two important air pollutants.</p>…”
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Relationship of baking types with DNA damage in blood lymphocytes of bakery workers by Mojtaba Kianmehr, jafar hajavi

“…Exposure of the bakeries to high levels of hazardous air pollutants from municipal gas is often forgot. In addition, the exposure of these people in bakeries with different types of baking is not the same. …”
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Quantifying urban, industrial, and background changes in NO₂ during the COVID-19 lockdown period based on TROPOMI satellite observations by V. Fioletov, C. A. McLinden, D. Griffin, N. Krotkov, F. Liu, H. Eskes

“…<p>The COVID-19 lockdown had a large impact on anthropogenic emissions of air pollutants and particularly on nitrogen dioxide (NO<span class="inline-formula">₂</span>). …”
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Contribution of nitrous acid to the atmospheric oxidation capacity in an industrial zone in the Yangtze River Delta region of China by J. Zheng, X. Shi, Y. Ma, Y. Ma, X. Ren, X. Ren, X. Ren, H. Jabbour, Y. Diao, Y. Diao, W. Wang, Y. Ge, Y. Zhang, W. Zhu

“…Our study indicated that an elevated PM<span class="inline-formula">_2.5</span> level during haze events can promote the conversion of <span class="inline-formula">NO₂</span> to HONO by providing more heterogeneous reaction sites, thereby increasing the atmospheric oxidation capacity, which may further promote the formation of secondary air pollutants.</p> <p><strong>Highlights:</strong><br/></p><ul><li> <p id="d1e673">High levels of HONO, with an average of <span class="inline-formula">1.32±0.92</span>&thinsp;ppbv, were observed near one of the largest industrial zones in the YRD region of China.…”
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Summertime response of ozone and fine particulate matter to mixing layer meteorology over the North China Plain by J. Wang, J. Gao, F. Che, X. Yang, Y. Yang, L. Liu, Y. Xiang, H. Li

“…We highlight that the correlation between MLH and secondary air pollutants should be treated with care in hot weather, and the superposition-composite effects of PM<span class="inline-formula">_2.5</span> and O<span class="inline-formula">₃</span> along with the evolution of mixing layer should be considered when developing PM<span class="inline-formula">_2.5</span>–O<span class="inline-formula">₃</span> coordinated control strategies.…”
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Environmental and economical ethics collide by Camille Castelyn

“…In January 2020, during China’s COVID-19 outbreak, the NASA Earth Observatory captured aerial images indicating significantly lower emissions of nitrogen dioxide (NO2), a major air pollutant, across China’s mainland.[1] Scientists across the globe have reported preliminary empirical data that amid shelter-in-place directives and the shutting down of large-scale economic activity, the environment is flourishing. …”
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Linking Switzerland's PM₁₀ and PM_2.5 oxidative potential (OP) with emission sources by S. K. Grange, S. K. Grange, G. Uzu, S. Weber, J.-L. Jaffrezo, C. Hueglin

“…<p>Particulate matter (PM) is the air pollutant that causes the greatest deleterious health effects across the world, so PM is routinely monitored within air quality networks, usually in respect to PM mass or number in different size fractions. …”
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Measurements and Analyses of Urban Metabolism and Trace Gas Respiration by McManus, J.B., Shorter, J.H., Zahniser, M.S., Kolb, C.E., O’Neill, S.M., Stock, D., Napelenok, S., Allwine, E.J., Lamb, B.K., Scheuer, E., Talbot, R.W., San Martini, F., Adamkiewicz, G., LiPun, B.K., Wang, C., McRae, G.J., Cao, L., Ismail, A.A., Kawabata, M., Yeang, C-H., Narasimhan, G., Humbad, S., Zhang, M., Ferreira, J. Jr

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Examining the implications of photochemical indicators for O₃–NO_<i>x</i>–VOC sensitivity and control strategies: a case study in the Yangtze River Delta (YRD)... by X. Li, M. Qin, L. Li, K. Gong, H. Shen, J. Li, J. Hu

“…<p>Ozone (O<span class="inline-formula">₃</span>) has become a significant air pollutant in China in recent years. O<span class="inline-formula">₃</span> abatement is challenging due to the nonlinear response of O<span class="inline-formula">₃</span> to precursors nitrogen oxides (NO<span class="inline-formula">_<i>x</i></span>) and volatile organic compounds (VOCs). …”
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Measurement report: Atmospheric nitrate radical chemistry in the South China Sea influenced by the urban outflow of the Pearl River Delta by J. Wang, J. Wang, J. Wang, H. Wang, H. Wang, H. Wang, Y. J. Tham, Y. J. Tham, L. Ming, Z. Zheng, Z. Zheng, G. Fang, C. Sun, C. Sun, C. Sun, Z. Ling, Z. Ling, Z. Ling, J. Zhao, J. Zhao, J. Zhao, S. Fan, S. Fan, S. Fan

“…<p>The nitrate radical (NO<span class="inline-formula">₃</span>) is a critical nocturnal atmospheric oxidant in the troposphere, which widely affects the fate of air pollutants and regulates air quality. Many previous works have reported the chemistry of NO<span class="inline-formula">₃</span> in inland regions of China, while fewer studies target marine regions. …”
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Eurodelta multi-model simulated and observed particulate matter trends in Europe in the period of 1990–2010 by S. Tsyro, W. Aas, A. Colette, C. Andersson, B. Bessagnet, B. Bessagnet, G. Ciarelli, F. Couvidat, K. Cuvelier, K. Cuvelier, A. Manders, K. Mar, M. Mircea, N. Otero, N. Otero, M.-T. Pay, V. Raffort, Y. Roustan, M. R. Theobald, M. G. Vivanco, H. Fagerli, P. Wind, P. Wind, G. Briganti, A. Cappelletti, M. D'Isidoro, M. Adani

“…An in-depth trend analysis has been performed for PM<span class="inline-formula">₁₀</span> and PM<span class="inline-formula">_2.5</span> for the period of 2000–2010, based on results from six chemical transport models and observational data from the EMEP (Cooperative Programme for Monitoring and Evaluation of the Long-range Transmission of Air Pollutants in Europe) monitoring network. Given harmonization of set-up and main input data, the differences in model results should mainly result from differences in the process formulations within the models themselves, and the spread in the model-simulated trends could be regarded as an indicator for modelling uncertainty.…”
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Chemical ionization mass spectrometry utilizing ammonium ions (NH₄⁺ CIMS) for measurements of organic compounds in the atmosphere by L. Xu, L. Xu, M. M. Coggon, C. E. Stockwell, C. E. Stockwell, J. B. Gilman, M. A. Robinson, M. A. Robinson, M. A. Robinson, M. Breitenlechner, M. Breitenlechner, A. Lamplugh, A. Lamplugh, A. Lamplugh, J. D. Crounse, P. O. Wennberg, P. O. Wennberg, J. A. Neuman, J. A. Neuman, G. A. Novak, G. A. Novak, P. R. Veres, S. S. Brown, S. S. Brown, C. Warneke

“…This instrument was deployed in the RECAP campaign (Re-Evaluating the Chemistry of Air Pollutants in California) in Pasadena, California, during summer 2021. …”
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