Ozone pollution in Beirut: variability of concentrations between the urban zone and the peripheral zone

https://doi.org/10.35595/2414-9179-2019-2-25-34-42

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About the Author

Samar C. Sakr

Lebanese University, department of geography, Faculty of Literatures and Human sciences,
Fanar, Lebanon,
E-mail: samarsakr2005@hotmail.com

Abstract

The study of the distribution of the average ozone concentrations during the photochemical season shows a daily rhythm with a morning minimum, and a maximum between midday and 16:00 for the station located in urban environment of dense traffic and a station with a lower traffic. On a weekly scale, the content ozone is relatively high Saturday and Sunday (weekend effect) and lowers Friday because of the intensification of the road traffic attested by a rise of the nitrogen oxide concentrations (NOx). In addition, for the station located in zone having a less dense traffic the diurnal rates are especially more marked during the afternoon and the night time. The frequently analysis of the maximum ozone concentrations shows, on the scale day, that half of the total staff complement of the goings beyond is carried out between midday and 18:00. The goings beyond standard 180 μg/m³ are recorded in 90 % of the case with a wind going from 3 to 4 m/s. The pink of pollution confirms that they are situations of breeze of sea the day and land breeze the night.

Keywords

atmospheric pollution, ozone, Beirut.

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For citation: Sakr S.C. Ozone pollution in Beirut: variability of concentrations between the urban zone and the peripheral zone InterCarto. InterGIS. GI support of sustainable development of territories: Proceedings of the International conference. Moscow: Moscow University Press, 2019. V. 25. Part 2. P. 34–42. DOI: 10.35595/2414-9179-2019-2-25-34-42 (In French)