Skip to content
Journal article

Mobile mini-DOAS measurement of the outflow of NO2 and HCHO from Mexico City

Johansson M, Rivera C, de Foy B, Lei W, Song J, Zhang Y, Galle B, Molina L ...see all

Atmos. Chem. Phys., vol. 9, issue 15 (2009) pp. 5647-5653

  • 26

    Readers

    Mendeley users who have this article in their library.
  • 30

    Citations

    Citations of this article.
  • N/A

    Views

    ScienceDirect users who have downloaded this article.
Sign in to save reference

Abstract

We here present the results from mobile measurements using two ground-based zenith viewing Differential Optical Absorption Spectroscopy (DOAS) instruments. The measurement was performed in a cross-section of the plume from the Mexico City Metropolitan Area (MCMA) on 10 March 2006 as part of the MILAGRO field campaign. The two instruments operated in the UV and the visible wavelength region respectively and have been used to derive the differential vertical columns of HCHO and NO sub(2) above the measurement route. This is the first time the mobile mini-DOAS instrument has been able to measure HCHO, one of the chemically most important and interesting gases in the polluted urban atmosphere. Using a mass-averaged wind speed and wind direction from the WRF model the instantaneous flux of HCHO and NO sub(2) has been calculated from the measurements and the results are compared to the CAMx chemical model. The calculated flux through the measured cross-section was 1.9 (1.5-2.2) kg/s of HCHO and 4.4 (4.0-5.0) kg/s of NO sub(2) using the UV instrument and 3.66 (3.63-3.73) kg/s of NO sub(2) using the visible light instrument. The modeled values from CAMx for the outflow of both NO sub(2) and HCHO, 1.1 and 3.6 kg/s, respectively, show a reasonable agreement with the measurement derived fluxes.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text

Authors

  • M. Johansson

  • C. Rivera

  • B. de Foy

  • W. Lei

  • J. Song

  • Y. Zhang

Cite this document

Choose a citation style from the tabs below