Surface and total ozone investigations in the region of Sofia, Bulgaria

Grigorieva, V.N.; Kolev, Nikolay Ivanov; Donev, E; Ivanov, Danko; Mendeva, B.; Evgenieva, Tsvetina; Danchovski, Ventsislav; Kolev, Ivan

doi:10.1080/01431161.2011.621904

Cited by 4 publications

(2 citation statements)

References 44 publications

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“…During the daytime, the increase in precursor emissions, temperature and solar radiation results in the photolysis of NO2 dominating O3-VOC-NOx chemistry [50], which leads to an increase in the ground-level ozone concentration and a peak between 3 and 4 pm. Similar daily changes in ozone concentrations have been observed in Beijing, the YRD, India and Europe [30,42,51,52].…”

Section: Diurnal Variationsupporting

confidence: 75%

Characteristics of Ozone Pollution, Regional Distribution and Causes during 2014–2018 in Shandong Province, East China

Zhang

Wang

Qu³

et al. 2019

Atmosphere

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The summer ozone pollution of Shandong province has become a severe problem in the period 2014–2018. Affected by the monsoon climate, the monthly average ozone concentrations in most areas were unimodal, with peaks in June, whereas in coastal areas the concentrations were bimodal, with the highest peak in May and the second highest peak in September. Using the empirical orthogonal function method, three main spatial distribution patterns were found. The most important pattern proved the influences of solar radiation, temperature, and industrial structure on ozone. Spatial clustering analysis of the ozone concentration showed Shandong divided into five units, including Peninsula Coastal area (PC), Lunan inland area (LN), Western Bohai area (WB), Luxi plain area (LX), and Luzhong mountain area (LZ). Influenced by air temperature and local circulation, coastal cities had lower daytime and higher nighttime ozone concentrations than inland. Correlation analysis suggested that ozone concentrations were significantly positively correlated with solar radiation. The VOCs from industries or other sources (e.g., traffic emission, petroleum processing, and chemical industries) had high positive correlations with ozone concentrations, whereas NOx emissions had significantly negatively correlation. This study provides a comprehensive understanding of ozone pollution and theoretical reference for regional management of ozone pollution in Shandong province.

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Section: Diurnal Variationsupporting

confidence: 75%

Characteristics of Ozone Pollution, Regional Distribution and Causes during 2014–2018 in Shandong Province, East China

Zhang

Wang

Qu³

et al. 2019

Atmosphere

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“…Diurnal, monthly and seasonal trends were observed, where it is worth to mention that the monthly average ozone concentration in the mountain are higher than those in Sofia, as well as the maximum concentration in winter and spring are higher in Plana than in Sofia, while the maximum concentration during summer are slightly higher in Sofia than in Plana. Grigorieva et al (2012) investigated the surface and total ozone content in the region of Sofia and demonstrated that diurnal ozone cycles had been repeated and similar ozone data had been received every year in the studied 11-year period, if the similar meteorological conditions (solar radiation, temperature, relative humidity, wind speed) in the same season (autumn) were chosen. The reported diurnal ozone variations are typical for urban sites and are characterized by the afternoon ozone maximum and night minimum.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Ozone Concentration in Sofia, Bulgaria

Nikolova¹,

Mintcheva²,

Geology³

2018

Air and Water Components of the Environment Conference

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Evaluation of ozone concentration in Sofia, Bulgaria. The variability of the concentration of ground level ozone (O3) and its relation to the air temperature and wind speed are analysed based on daily and seasonal data from four stations for automatic monitoring of the air quality at the region of Sofia. Three of the stations are situated in the city and one is in the Vitosha Mountain which is located in the vicinity of Sofia, thus a comparison between urban and non-urban sites is pointed out. Data for the period from 2006 to 2015 are analyzed. The average monthly concentrations of the ground level O3 have shown well-defined annual cycle with the highest value in the summer and lowest in the winter. The average seasonal O3 concentrations for the mountainous site, which is located at 1345 m above sea level, are higher than those for the city stations. The correlation analysis shows good relation between seasonal O3 concentration and wind speed in the winter, as well as positive correlation of air temperature and ozone concentrations in summer and autumn.

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