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- Title
MOBILE MEASUREMENTS OF NITROGEN DIOXIDE USING TWO DIFFERENT UV-VIS SPECTROMETERS.
- Authors
Roșu, Adrian; Constantin, Daniel-Eduard; Roşu, Bogdan; Calmuc, Valentina; Arseni, Maxim; Voiculescu, Mirela; Georgescu, Lucian Puiu
- Abstract
The presence of nitrogen dioxide in the entire atmosphere is scarce, yet in lower atmospheric layers the concentration is continuously raising becoming a risk for human health and environment. The main sources for nitrogen dioxide in the atmosphere are related to natural sources and anthropogenic activity. Besides the in-situ measurement techniques (e.g. chemiluminiscence or electrochemical detection) the NO2 abundance in the atmosphere can be studied using remote sensing methods. One of these methods is the DOAS technique which uses sunlight for trace gas detection. This paper aims in presenting the differences of the measurements of DSCD (Differential Slant Columns Densities) for nitrogen dioxide in Bucharest city performed in July 2019 with two different mobile DOAS (Differential Optical Absorption Spectroscopy) remote sensing systems. The mobile DOAS system is basically composed of a mobile platform (e.g. car, airplane, boat, etc.) and a DOAS system (spectrometer, optical fiber, telescope) that gathers spectra from the zenith-sky. One of the systems uses a spectrometer that has the CCD (Charged Coupled Device) detector cooled and one with a spectrometer non-cooled CCD. Results of the study showed that traffic is one of the main sources of pollution in Bucharest and the pollution plume is transported according to wind direction.
- Subjects
BUCHAREST (Romania); NITROGEN dioxide; REMOTE sensing; LIGHT absorption; SPECTROMETERS; ATMOSPHERIC layers; PHOTOACOUSTIC spectroscopy; TELESCOPES
- Publication
TEHNOMUS, 2019, p71
- ISSN
1224-029X
- Publication type
Article