Influence of NO2, NO and meteorological conditions on the tropospheric O3 concentration at an industrial station

Paraschiv, Spiru; Bărbuță-Mișu, Nicoleta; Paraschiv, Simona Lizica

doi:10.1016/j.egyr.2020.11.263

Cited by 22 publications

(11 citation statements)

References 12 publications

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“…These previous works can well explain the observed negative response of O3 to PM2.5 and RH in Figure 3B. Previous studies have observed a positive correlation between the O3 concentration and T or SR (Steiner et al, 2010;Paraschiv et al, 2020;. Temperature can directly affect the chemical reaction rate of O3 formation (Fu et al, 2015), and SR can promote the photolysis of NO2 (Hu et al, 2017;Wang et al, 2020b), thus accelerating O3 formation.…”

Section: Prediction Performance Of the Modelsupporting

confidence: 68%

Ozone formation sensitivity study using machine learning coupled with reactivity of VOC species

Zhan

Zhang

et al. 2021

Preprint

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Abstract. The formation of ground-level ozone (O3) is dependent on both atmospheric chemical processes and meteorological factors. Traditional models have difficulty assessing O3 formation sensitivity in a timely manner due to the limitations of flexibility and computational efficiency. In this study, a random forest (RF) model coupled with the reactivity of volatile organic compound (VOC) species was used to investigate the O3 formation sensitivity in Beijing from 2014 to 2016, and evaluate the relative importance (RI) of chemical and meteorological factors to O3 formation. The results showed that the O3 prediction performance using initial concentrations of VOC species (R2 = 0.87) was better than that using total VOCs (TVOCs) concentrations (R2 = 0.77). Meanwhile, the RIs of VOC species correlated well with their O3 formation potentials (OFPs). O3 formation presented a negative response to NOx, PM2.5 and relative humidity, and a positive response to temperature, solar radiation and VOCs. The O3 isopleth curves calculated by the RF model were generally comparable with those calculated by the box model. O3 formation shifted from a VOC-limited regime to a transition regime from 2014 to 2016. This study demonstrates that the RF model coupled with the initial concentrations of VOC species could provide an accurate, flexible, and computationally efficient approach for O3 sensitivity analysis.

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Section: Prediction Performance Of the Modelsupporting

confidence: 68%

Ozone formation sensitivity study using machine learning coupled with reactivity of VOC species

Zhan

Zhang

et al. 2021

Preprint

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“…The strength of the association varies with season [40]. The correlation analysis in each season showed negative correlations of O 3 with NO and NO 2 (higher correlation with NO 2 in spring and summer and with NO in the autumn and winter) [41]. This difference can be explained by the interference of meteorological parameters and distinct weather types that affect the pollutants' transport and mixing in the atmosphere.…”

Section: Surface Ozone and No X Relationmentioning

confidence: 93%

“…Pires et al [24] showed a weak positive correlation of T and a slight negative association of SR and RH with O 3 in a station located in Northern Portugal. The discrepancies between the two applied statistical methods expose the complex task of predicting ozone levels, although, in general, studies applying relationship methods show a positive correlation of O 3 with SR and T and a negative correlation with RH [39,41].…”

Section: Surface Ozone and Meteorological Parameters Relationmentioning

confidence: 99%

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Surface Ozone Pollution: Trends, Meteorological Influences, and Chemical Precursors in Portugal

Silva

Pires

2022

Sustainability

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Surface ozone (O3) is a secondary air pollutant, harmful to human health and vegetation. To provide a long-term study of O3 concentrations in Portugal (study period: 2009–2019), a statistical analysis of ozone trends in rural stations (where the highest concentrations can be found) was first performed. Additionally, the effect of nitrogen oxides (NOx) and meteorological variables on O3 concentrations were evaluated in different environments in northern Portugal. A decreasing trend of O3 concentrations was observed in almost all monitoring stations. However, several exceedances to the standard values legislated for human health and vegetation protection were recorded. Daily and seasonal O3 profiles showed high concentrations in the afternoon and summer (for all inland rural stations) or spring (for Portuguese islands). The high number of groups obtained from the cluster analysis showed the difference of ozone behaviour amongst the existent rural stations, highlighting the effectiveness of the current geographical distribution of monitoring stations. Stronger correlations between O3, NO, and NO2 were detected at the urban site, indicating that the O3 concentration was more NOx-sensitive in urban environments. Solar radiation showed a higher correlation with O3 concentration regarding the meteorological influence. The wind and pollutants transport must also be considered in air quality studies. The presented results enable the definition of air quality policies to prevent and/or mitigate unfavourable outcomes from O3 pollution.

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“…Along with providing comfortable conditions in buildings above underground mines, the technical and economic assessment of the effi ciency of the radiant heating system by infrared heaters plays an important role, namely the analysis of investment and operating costs for re-equipment of the heating system [18,19].…”

Section: Introductionmentioning

confidence: 99%

Optimization of heating efficiency of buildings above underground coal mines by infrared heaters

Spodyniuk¹,

Voznyak²,

Savchenko³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. To optimize the energy and economic efficiency of heating system of ground structures of coal mines with infrared heaters due to the rational choice of technical parameters of heating devices and their operating conditions, namely, the irradiation intensity of the floor q, thermal power of the heater Q, blackness degree of the floor surface and the height of installation H of infrared heaters. To achieve this goal, the task was to conduct theoretical and experimental studies on infrared heaters NL-12R of heating system of a building above underground coal mines during its thermal modernization. Methodology. At applying radiant heating systems, infrared heaters provide local heating of the working area of the buildings above underground coal mines. As a result, the necessary temperature conditions are maintained in the buildings above underground coal mines and there is a possibility of creating a local microclimate. A multifactorial experiment was performed taking into account the interaction of factors. The results of the study are presented in graphical and analytical forms. In addition, an analytical method was used to optimize parameters and operating conditions of the radiant heating system with infrared heaters NL-12R, and their number in the system of combined heating of buildings above underground coal mines is optimized. Findings. According to the experimental results, dependence of the relative floor temperature on the intensity of floor irradiation q, thermal power of the heater Q, blackness degree of the floor surface floor and the height H of infrared heaters location was determined. The results are presented in the form of graphs and nomograms, as well as approximated by their analytical equations. The annual economic effect of the optimal variant of combined heating system due to use the maximum number of infrared heaters NL-12R is 39.4 Euro/year provided that the installation of infrared heaters NL-12R with a power of Q = 1200 W in the number of 5 pcs. Originality. Optimization of energy and economic efficiency of heating system of buildings above underground coal mines by infrared heaters NL-12R, due to the rational choice of technical parameters of heating devices and conditions of their operation, was carried out by the analytical method. Practical value. Results of optimization of thermal and economic parameters of operation of the combined heating system of buildings above underground coal mines with installation of infrared heaters NL-12R with power Q = 1200 W proved the efficiency of combined heating of above-ground structures and the achievement of the annual economic effect of 39.4 Euro/year.

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Influence of NO2, NO and meteorological conditions on the tropospheric O3 concentration at an industrial station

Cited by 22 publications

References 12 publications

Ozone formation sensitivity study using machine learning coupled with reactivity of VOC species

Ozone formation sensitivity study using machine learning coupled with reactivity of VOC species

Surface Ozone Pollution: Trends, Meteorological Influences, and Chemical Precursors in Portugal

Optimization of heating efficiency of buildings above underground coal mines by infrared heaters

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