Title: Changes of oxygen (O2) content in the air of Warsaw agglomeration in 2008–2009

Authors: MAJEWSKI, G., CICHOCKA, D.

Keywords: oxygen in atmosphere, meteorological conditions, Warsaw agglomeration

Abstract: Oxygen is an element that plays a special role in the environment. It takes part in the life processes of organisms and chemical reactions, so changing its content in the air could pose a threat to their proper course. The main aim is to assess changes of oxygen content in the air in Warsaw agglomeration. The research was conducted in 2008–2009, at three stations in different degree of urbanization surroundings. MzNiepodKom (WaK) is located in the city center, the station MzWarszUrsynów (WaU) is located in the southern suburb of Warsaw, and the station MzLegionZeg (Leg) located in the suburban area of the city Legionowo. This will allow to define frequency of a reduced level of oxygen in the air, threatening human health. The content of oxygen in the air was calculated with the modified Clapeyron formula. A different structure of analysed areas contributed to the variation of the recorded meteorological parameters, that influence the concentration of oxygen in the air over those areas. Mean yearly air oxygen concentration is higher on suburban area than in the city centre. The highest annual mean air oxygen concentration at all analysed station was reached in 2009. The highest mean value was recorded at suburban station (284.0 g·m–3), and the lowest was reached at the station located exactly in the city centre, within the dense urban housing (282.3 g·m–3). Air oxygen concentration is characterized by a certain yearly course: maximum takes place in winter months, and minimum of air oxygen content is observed during summer. Mean oxygen concentration in the air has a daily periodicity. In the daily course of oxygen concentration, the maximum is reached at night, and the minimum is observed in the afternoon hours. The threat to human health, resulting from a considerable variability of oxygen in the air in short periods of time, is the highest in the cold half-year, and first of all in January, October and December. The lowest number of days with changes of air oxygen concentration below 2.5 g·m–3, which is an indifferent incentive for human organism, was observed at the station located exactly in the city centre. At that station, there was also the highest number of days with oxygen changes classifi ed as a hard, highly noticeable, change of environmental conditions.

APA style references: Majewski, G. & Cichocka, D. (2012). Changes of oxygen (O2) content in the air of Warsaw agglomeration in 2008–2009. Scientific Review Engineering and Environmental Sciences, 21 (2), 33-49.

APA style citation in text: The first time citation in text: (Majewski & Cichocka, 2012), next citation: (Majewski & Cichocka, 2012)

Chicago style references: Majewski, Grzegorz, Dorota Cichocka. "Changes of oxygen (O2) content in the air of Warsaw agglomeration in 2008–2009." Scientific Review Engineering and Environmental Sciences, 56 ser., vol. 21, no 2, (2012): 33-49.

Chicago style citation in text: (Majewski, and Cichocka 2012)

Bibtxt style references: @article{Majewski_Cichocka_2012_PNIKS, author={Majewski, Grzegorz and Cichocka, Dorota}, title={Changes of oxygen (O2) content in the air of Warsaw agglomeration in 2008–2009.}, journal={Scientific Review Engineering and Environmental Sciences}, URL={http://iks_pn.sggw.pl/PN56/A4/art4.pdf}, year={2012}, volume={21 (2)}, number={56}, pages={33-49}}

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