Atmospheric Chemistry and Physics Discussions www.atmos-chem-phys-discuss.net 1680-7367 1680-7375 9 1 2009 10.5194/acpd-9-5153-2009 http://www.atmos-chem-phys-discuss.net/9/5153/2009/ http://www.atmos-chem-phys-discuss.net/9/5153/2009/acpd-9-5153-2009.html http://www.atmos-chem-phys-discuss.net/9/5153/2009/acpd-9-5153-2009.pdf 5153 5176 2009-02-25 Tula industrial complex (Mexico) emissions of SO₂ and NO₂ during the MCMA 2006 field campaign using a Mini-DOAS system C. Rivera G. Sosa H. Wöhrnschimmel B. de Foy M. Johansson B. Galle Department of Radio and Space Science, Chalmers University of Technology, 41296 Gothenburg, Sweden Matemáticas Aplicadas y Computación, México, Instituto Mexicano del Petróleo, 07730 Mexico, D.F., Mexico Instituto Nacional de Ecología, 04530 Mexico D.F., Mexico Molina Center for Energy and the Environment, CA, USA Department of Earth and Atmospheric Sciences, Saint Louis University, MO, USA The Mexico City Metropolitan Area (MCMA) has presented severe pollution problems for many years. There are several point and mobile emission sources inside and outside the MCMA which are known to affect air quality in the area. In particular, speculation has risen as to whether the Tula industrial complex, located 60 km northwest of the MCMA has any influence on high SO₂ levels occurring on the northern part of the city, in the winter season mainly. 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