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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Volume 5, issue 5 | Copyright
Atmos. Meas. Tech., 5, 1165-1172, 2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 24 May 2012

Research article | 24 May 2012

DOAS-measurement of the NO2 formation rate from NOx emissions into the atmosphere

E. Frins1, M. Osorio1, N. Casaballe1, G. Belsterli1, T. Wagner2, and U. Platt3 E. Frins et al.
  • 1Instituto de Física, Facultad de Ingeniería, Universidad de la República, Julio Herrera y Reissig 565, Montevideo, Uruguay
  • 2Max-Planck Institut für Chemie, 55128 Mainz, Germany
  • 3Institut für Umweltphysik, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany

Abstract. In the present work we deal with emissions originating from combustion processes containing SO2, NO and NO2, emitted into the atmosphere by a localized source. We present a method for measuring the NO2-formation rate (due to conversion of NO to NO2) from measurements of SO2- and NO2-slant column densities across different plume sections, under the (usually justified) assumption that the SO2-flux is constant. The advantages of the proposed method are that the measurements can be performed from an arbitrary location, without explicit reference to the wind speed and direction in the plume. We present results of ground based DOAS-measurements of SO2 and NOx emissions from an oil refinery located in the northern part of Montevideo Bay and give recommendations for future applications of the method.

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