Long path DOAS measurements of atmospheric pollutants concentration

Pavel P. Geiko; Sergey S. Smirnov; Ignatii V. Samokhvalov

doi:10.1117/12.2205121

19 November 2015 Long path DOAS measurements of atmospheric pollutants concentration

Pavel P. Geiko, Sergey S. Smirnov, Ignatii V. Samokhvalov

Proceedings Volume 9680, 21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics; 968034 (2015) https://doi.org/10.1117/12.2205121
Event: XXI International Symposium Atmospheric and Ocean Optics. Atmospheric Physics, 2015, Tomsk, Russian Federation

Abstract

A differential optical absorption spectroscopy gas-analyzer consisted of a coaxial telescope, a spectrometer, an analyzer and retroreflector was successfully tested. A high pressure 150-W Xe arc lamp was employed as a light source. In order to record the spectra, a monochrometer with a grating and photodiode array was used. Gas analyzer spectral data bank includes more than 35 moleculas absorbed in UV spectral region. The measured absorption spectra were evaluated by using a least-squares fit to determine the average mixing ratio of each species in the atmosphere. As a result of experiments time series of concentrations of gases polluting the atmosphere were trace measured. Minimally detected concentration on pathlength 480 m is the unit of ppb at the time of accumulation of 2 min. The results of the field test measurements of pollutants in Tomsk city are presented.

Citation Download Citation

Pavel P. Geiko, Sergey S. Smirnov, and Ignatii V. Samokhvalov "Long path DOAS measurements of atmospheric pollutants concentration ", Proc. SPIE 9680, 21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics, 968034 (19 November 2015); https://doi.org/10.1117/12.2205121

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