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dc.contributor.authorRoşu, A.
dc.contributor.authorConstantin, D.-E.
dc.contributor.authorVoiculescu, M.
dc.contributor.authorArseni, M.
dc.contributor.authorMerlaud, A.
dc.contributor.authorVan Roozendael, M.
dc.contributor.authorGeorgescu, P.L.
dc.contributor.editor
dc.date2020
dc.date.accessioned2020-02-04T09:30:45Z
dc.date.available2020-02-04T09:30:45Z
dc.identifier.urihttps://orfeo.kbr.be/handle/internal/7445
dc.descriptionThis article describes the prototype of a new MAX-DOAS (multi-axis differential optical absorption spectroscopy) system built at “Dunarea de Jos” University of Galati (UGAL), Romania, and the first results of its use to observe NO2 content over Galati city (45.42° N, 28.04° E). The new equipment is a ground-based MAX-DOAS system capable of measuring the spatial distribution of DSCD (differential slant column densities) of several trace gases using horizontal and vertical observations. The new optic system, named UGAL-2-DOAS, is an in-house, low-cost, solution in comparison to the existing market of the MAX-DOAS systems. This paper describes the technical design and capabilities of the new MAX-DOAS instrument. The UGAL-2D-DOAS system was tested in April and June 2017 in Galati city. Measurements over three days were selected for the present manuscript. Full azimuthal (0–360°), local celestial meridian observations and other elevation angle sequence measurements (e.g., E–W) were performed. We found that the new MAX-DOAS system is able to detect diurnal variation and the local source emissions of NO2 from the urban environment. Also, we present concomitant zenith-sky car-DOAS observations measurements around the location of the new MAX-DOAS instrument. Comparing the horizontal scanning sequence of the new developed instrument with the mobile DOAS observations, we found that both systems can indicate and detect the same NO2 sources.
dc.languageeng
dc.titleObservations of Atmospheric NO₂ Using a New Low-Cost MAX-DOAS System
dc.typeArticle
dc.subject.frascatiEarth and related Environmental sciences
dc.audienceScientific
dc.subject.freeUV–Vis spectroscopy
dc.subject.freeatmospheric remote sensing
dc.subject.freenitrogen dioxide
dc.subject.freeMAX-DOAS
dc.subject.freemobile DOAS
dc.source.titleAtmosphere
dc.source.volume11
dc.source.issue2
dc.source.pageA129
Orfeo.peerreviewedYes
dc.identifier.doi10.3390/atmos11020129


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