Nitrogen oxides contents in the city of Moscow at different height levels

Anatolyi N. Nikolayev; Boris P. Abramovsky; Shepa D. Fridman; Alexander N. Krasa

doi:10.1117/12.221023

20 September 1995 Nitrogen oxides contents in the city of Moscow at different height levels

Anatolyi N. Nikolayev, Boris P. Abramovsky, Shepa D. Fridman, Alexander N. Krasa

Proceedings Volume 2506, Air Pollution and Visibility Measurements; (1995) https://doi.org/10.1117/12.221023
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

Abstract

Nitrogen oxide is one of the main pollutants in the atmosphere of Moscow city. Its content in the air of Moscow is in many cases much more than the maximum permissible concentration. Regular measurements of NO₂ concentrations were performed from 1986 with the help of long-path laser gas analyzer at the station of optical monitoring of atmosphere pollution in the northeastern part of Moscow. Chemiluminescent gas analyzers were used for simultaneous measurements of NO, NO₂, and NO_x at the heights of 3 m and 82 m above the ground level. The ratios NO₂:NO_x at the high level were in all cases more than at the low level except for the days with the winds from the forest-park zone of Moscow. The results permitted the estimation of the rate of NO to NO₂ conversion assuming that sources of NO_x emission are placed at the surface (automobile transport). Mean value of NO to NO₂ conversion rate is 1.24 + 0.57 hr$_-1). This value may be used for model calculations of NO₂ contents in an urban air. The revealed tendencies in the grade of conversion NO to NO₂ according to seasons and day to night changing promotes to enhance the reliability of NO₂ emissions estimation in Moscow and other cities. The research was supported by US DOE award.

Citation Download Citation

Anatolyi N. Nikolayev, Boris P. Abramovsky, Shepa D. Fridman, and Alexander N. Krasa "Nitrogen oxides contents in the city of Moscow at different height levels", Proc. SPIE 2506, Air Pollution and Visibility Measurements, (20 September 1995); https://doi.org/10.1117/12.221023

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