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Carpathian Journal of Earth and Environmental Sciences

An International Peer-Reviewed Open Access Journal

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Home » Past Issues » Volume 12, 2017 - Number 2 » NO2 AND SO2 OBSERVATIONS IN SOUTHEAST EUROPE USING MOBILE DOAS OBSERVATIONS

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ARTICLE IN » Volume 12, 2017 - Number 2

NO2 AND SO2 OBSERVATIONS IN SOUTHEAST EUROPE USING MOBILE DOAS OBSERVATIONS



Daniel-Eduard CONSTANTIN1*, Alexis MERLAUD2, Mirela VOICULESCU1, Michel VAN ROOZENDAEL2, Maxim ARSENI1, Adrian ROSU1 & Lucian GEORGESCU1
1"Dunarea de Jos", University of Galati, Faculty of Sciences and Environment, European Center of Excellence for the Environment, Str. Domneasca, Nr.111, Galati 800008, Romania; E-mail: daniel.constantin@ugal.ro
2Belgian Institute for Space Aeronomy, Ringlaan-3-Avenue Circulaire B-1180, Brussels 1180, Belgium

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Abstract

In this work we present the first and longest zenith-sky mobile DOAS (Differential Optical Absorption Spectroscopy) measurements performed in Southeast Europe. The mobile DOAS observations were performed on board of a motor vehicle using an UV-Vis spectrometer during several days on 2015 and 2016 in Romania, Bulgaria, Greece and Republic of Moldova. The target trace gases are: nitrogen dioxide (NO2) and sulfur dioxide (SO2). The mobile DOAS measurements performed on ground represents aproximative 1500 km travelled on roads. The highest tropospheric NO2 (1x1017 molec./cm2) and SO2 (~2.5x1018 molec/cm2) content was determined in the Jiu Valley Romania, where large fossil-fuel power station exist. The study also presents comparisons of tropospheric NO2 Vertical Column Density (VCD) deduced from mobile DOAS measurements with Ozone Monitoring Instrument observations. We found a good agreement between ground and space observations for two important urban agglomerations. For Bucuresti city the averaged mobile DOAS observations function of OMI pixel coordinates show 4.11 (±0.61) x1015 molec/cm2 while OMI detected 5.94 (±2.87) x1015 molec/cm2. For the other important city, Thessaloniki, averaged mobile DOAS observations indicate 5.44 ± (0.84) x1015 molec/cm2 while OMI space observations presents 5.66 (±1.56) x1015 molec/cm2. We found also that due to the smoothing effect inside the pixel, OMI sensor underestimated the important NO2 emissions located in the Jiu Valley, Romania.
Keywords:
  • atmosphere
  • nitrogen
  • dioxide
  • sulfur
  • dioxide
  • mobile
  • DOAS
  • observations
  • space
  • observations

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© 2017 by the author(s). Licensee CJEES, Carpathian Association of Environment and Earth Sciences. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

How to cite

Daniel-Eduard CONSTANTIN, Alexis MERLAUD, Mirela VOICULESCU, Michel VAN ROOZENDAEL, Maxim ARSENI, Adrian ROSU & Lucian GEORGESCU (2017). NO2 AND SO2 OBSERVATIONS IN SOUTHEAST EUROPE USING MOBILE DOAS OBSERVATIONS

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