Characteristics of surface ozone and nitrogen oxides at urban, suburban and rural sites in Ningbo, China

Tong, Lei; Zhang, Huiling; Yu, Jie; He, Mengmeng; Xu, Ning; Zhang, Jingjing; Qian, Feizhong; Feng, Jingyi; Xiao, Hang

doi:10.1016/j.atmosres.2016.12.006

Cited by 107 publications

(53 citation statements)

References 43 publications

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“…High values of WS are associated with the dispersion of air pollutants, reducing their concentration. As NO2 concentrations decrease, O3 concentrations can achieve higher values [17,19,20,22]. The combined effect of T-WS showed the highest variability of O3 with T, showing a positive correlation between these variables.…”

Section: Ann Models and Interpretationmentioning

confidence: 89%

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Characterization of Surface Ozone Behavior at Different Regimes

Afonso

Pires

2017

Applied Sciences

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Previous studies showed that the influence of meteorological variables and concentrations of other air pollutants on O 3 concentrations changes at different O 3 concentration levels. In this study, threshold models with artificial neural networks (ANNs) were applied to characterize the O 3 behavior at an urban site (Porto, Portugal), describing the effect of environmental and meteorological variables on O 3 concentrations. ANN characteristics, and the threshold variable and value, were defined by genetic algorithms (GAs). The considered predictors were hourly average concentrations of NO, NO 2 , and O 3 , and meteorological variables (temperature, relative humidity, and wind speed) measured from January 2012 to December 2013. Seven simulations were performed and the achieved models considered wind speed (at 4.9 m·s −1 ), temperature (at 17.5 • C) and NO 2 (at 26.6 µg·m −3 ) as the variables that determine the change of O 3 behavior. All the achieved models presented a similar fitting performance: R 2 = 0.71-0.72, RMSE = 14.5-14.7 µg·m −3 , and the index of agreement of the second order of 0.91. The combined effect of these variables on O 3 concentration was also analyzed. This statistical model was shown to be a powerful tool for interpreting O 3 behavior, which is useful for defining policy strategies for human health protection concerning this air pollutant.

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Section: Ann Models and Interpretationmentioning

confidence: 89%

“…In urban areas, O 3 concentrations are usually lower than the values observed in rural areas [17][18][19][20]. This phenomenon occurs mainly due to high NO x concentrations.…”

Section: Introductionmentioning

confidence: 88%

Characterization of Surface Ozone Behavior at Different Regimes

Afonso

Pires

2017

Applied Sciences

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“…Many recent anemometer performance studies were performed to assess the impact of measurement accuracy on the wind energy sector (i.e., wind turbine power performance; Pindado et al, 2014). However, interest in advancing a comprehensive attribution of the stilling phenomenon also has other scientific, socioeconomic and environmental impacts (Azorin-Molina et al, 2017a), particularly because the impact of wind speed on atmospheric evaporative demand (e.g., McVicar et al, 2012;Limjirakan and Limsakul, 2012) and air pollutant concentrations (e.g., Tong et al, 2017), among others.…”

Section: Introductionmentioning

confidence: 99%

Evaluating anemometer drift: A statistical approach to correct biases in wind speed measurement

Azorín-Molina

Asín

McVicar

et al. 2018

Atmospheric Research

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A B S T R A C TRecent studies on observed wind variability have revealed a decline (termed "stilling") of near-surface wind speed during the last 30-50 years over many mid-latitude terrestrial regions, particularly in the Northern Hemisphere. The well-known impact of cup anemometer drift (i.e., wear on the bearings) on the observed weakening of wind speed has been mentioned as a potential contributor to the declining trend. However, to date, no research has quantified its contribution to stilling based on measurements, which is most likely due to lack of quantification of the ageing effect. In this study, a 3-year field experiment (2014-2016) with 10-minute paired wind speed measurements from one new and one malfunctioned (i.e., old bearings) SEAC SV5 cup anemometer which has been used by the Spanish Meteorological Agency in automatic weather stations since mid-1980s, was developed for assessing for the first time the role of anemometer drift on wind speed measurement. The results showed a statistical significant impact of anemometer drift on wind speed measurements, with the old anemometer measuring lower wind speeds than the new one. Biases show a marked temporal pattern and clear dependency on wind speed, with both weak and strong winds causing significant biases. This pioneering quantification of biases has allowed us to define two regression models that correct up to 37% of the artificial bias in wind speed due to measurement with an old anemometer.

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“…On a diurnal scale, emissions of NO x are typically greatest in the mornings and early evenings, coinciding with rush hour traffic (Tong et al . ). The early NO x peak is swiftly followed by an increase in O 3 concentrations as temperatures and sunlight promote the photochemical O 3 formation (Fig.…”

Section: Global Air Pollution Trendsmentioning

confidence: 97%

“…Therefore, O 3 has a tendency to peak after the initial burst of NO x and to decrease with declining sunlight (Tong et al . ).…”

Section: Global Air Pollution Trendsmentioning

confidence: 97%

Dynamics of plant responses to combinations of air pollutants

Papazian

Blande

2019

Plant Biol J

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The focus of this review is on how plants respond to combinations of multiple air pollutants. Global pollution trends, plant physiological responses and ecological perspectives in natural and agricultural systems are all discussed. In particular, we highlight the importance of studying sequential or simultaneous exposure of plants to pollutants, rather than exposure to individual pollutants in isolation, and explore how these responses may interfere with the way plants interact with their biotic community. Air pollutants can alter the normal physiology and metabolic functioning of plants. Here we describe how the phenotypic and molecular changes in response to multiple pollutants can differ compared to those elicited by single pollutants, and how different responses have been observed between plants in the field and in controlled laboratory conditions and between trees and crop plants. From an ecological perspective, we discuss how air pollution can result in greater susceptibility to biotic stressors and in direct or indirect effects on interactions with organisms that occupy higher trophic levels. Finally, we provide an overview of the potential uses of plants to mitigate air pollution, exploring the feasibility for pollution removal via the processes of bio-accumulation and phytoremediation. We conclude by proposing some new directions for future research in the field.

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Characteristics of surface ozone and nitrogen oxides at urban, suburban and rural sites in Ningbo, China

Cited by 107 publications

References 43 publications

Characterization of Surface Ozone Behavior at Different Regimes

Characterization of Surface Ozone Behavior at Different Regimes

Evaluating anemometer drift: A statistical approach to correct biases in wind speed measurement

Dynamics of plant responses to combinations of air pollutants

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