Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.668 IF 5.668
  • IF 5-year value: 6.201 IF 5-year
    6.201
  • CiteScore value: 6.13 CiteScore
    6.13
  • SNIP value: 1.633 SNIP 1.633
  • IPP value: 5.91 IPP 5.91
  • SJR value: 2.938 SJR 2.938
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 174 Scimago H
    index 174
  • h5-index value: 87 h5-index 87
Volume 9, issue 24
Atmos. Chem. Phys., 9, 9599-9617, 2009
https://doi.org/10.5194/acp-9-9599-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: MILAGRO/INTEX-B 2006

Atmos. Chem. Phys., 9, 9599-9617, 2009
https://doi.org/10.5194/acp-9-9599-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  22 Dec 2009

22 Dec 2009

Hit from both sides: tracking industrial and volcanic plumes in Mexico City with surface measurements and OMI SO2 retrievals during the MILAGRO field campaign

B. de Foy1, N. A. Krotkov2, N. Bei3,4, S. C. Herndon5, L. G. Huey6, A.-P. Martínez7, L. G. Ruiz-Suárez8, E. C. Wood5, M. Zavala3,4, and L. T. Molina3,4 B. de Foy et al.
  • 1Department of Earth and Atmospheric Sciences, Saint Louis University, St. Louis, MO, USA
  • 2Goddard Earth Sciences and Technology Center, University of Maryland, MD, USA
  • 3Molina Center for Energy and the Environment, La Jolla, CA, USA
  • 4Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
  • 5Aerodyne Research Inc., Billerica, MA, USA
  • 6Georgia Institute of Technology, Atlanta, GA, USA
  • 7General Direction of the National Center for Environmental Research and Training (CENICA), National Institute of Ecology (INE), Mexico
  • 8Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, Mexico

Abstract. Large sulfur dioxide plumes were measured in the Mexico City Metropolitan Area (MCMA) during the MILAGRO field campaign. This paper seeks to identify the sources of these plumes and the meteorological processes that affect their dispersion in a complex mountain basin. Surface measurements of SO2 and winds are analysed in combination with radar wind profiler data to identify transport directions. Satellite retrievals of vertical SO2 columns from the Ozone Monitoring Instrument (OMI) reveal the dispersion from both the Tula industrial complex and the Popocatepetl volcano. Oversampling the OMI swath data to a fine grid (3 by 3 km) and averaging over the field campaign yielded a high resolution image of the average plume transport. Numerical simulations are used to identify possible transport scenarios. The analysis suggests that both Tula and Popocatepetl contribute to SO2 levels in the MCMA, sometimes on the same day due to strong vertical wind shear. During the field campaign, model estimates suggest that the volcano accounts for about one tenth of the SO2 in the MCMA, with a roughly equal split for the rest between urban sources and the Tula industrial complex. The evaluation of simulations with known sources and pollutants suggests that the combination of observations and meteorological models will be useful in identifying sources and transport processes of other plumes observed during MILAGRO.

Publications Copernicus
Special issue
Download
Citation
Share