Weekly Cycle of Pollutant Concentrations in Near-Surface Air over Moscow

Time variations in the concentrations of gas pollutants CO, NO, NO 2 , SO 2 , and PM 10 aerosol in the surface atmospheric layer over Moscow show a weekly cycle, manifested as a decrease in the pollution level on weekends. The character of the weekly variations and amplitude of the weekly cycle were...

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Bibliographic Details
Published in:Atmospheric and oceanic optics 2019, Vol.32 (1), p.85-93
Main Authors: Elansky, N. F., Shilkin, A. V., Semutnikova, E. G., Zaharova, P. V., Rakitin, V. S., Ponomarev, N. A., Verevkin, Y. M.
Format: Article
Language:English
Subjects:
Amplitude
Amplitudes
Atmospheric chemistry
Atmospheric composition
Daytime
Lasers
Nature conservation
Nitrogen dioxide
Optical Devices
Optical Models and Databases
Optics
Organizations
Oscillations
Particulate matter
Photonics
Physics
Physics and Astronomy
Pollutants
Pollution levels
Sulfur dioxide
Weekly
Winter
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Summary:Time variations in the concentrations of gas pollutants CO, NO, NO 2 , SO 2 , and PM 10 aerosol in the surface atmospheric layer over Moscow show a weekly cycle, manifested as a decrease in the pollution level on weekends. The character of the weekly variations and amplitude of the weekly cycle were determined using, for the first time, a 10-year archive of observations of atmospheric composition from 46 State Nature Conservation Organization (SNCO) Mosecomonitoring stations. The amplitudes of weekly oscillations in the daytime CO concentration, averaged over the territory of the city and seasons, vary from 21.8% in spring to 29.2% in winter, and those of daytime NO concentration vary from 16.9% in summer to 38.1% in winter. The weekly cycle of daytime NO 2 concentration is stable throughout the year, and its amplitude is 33% on average. Amplitudes of weekly variations in SO 2 and PM 10 (22.7% and 35.2%, respectively) are maximal in autumn according to daytime data; the CH 4 weekly cycle is insignificant. In nighttime concentrations of these pollutants, a significant weekly cycle is extracted only for NO 2 . The analysis of the data, obtained for separate Moscow districts, shows approximately the same Sunday effect. Only CO concentrations have high amplitudes at the city center (39.2%) and in the southwestern sector (35.1%).
ISSN:1024-8560
2070-0393
DOI:10.1134/S1024856019010068