Atmospheric Chemistry and Physics Discussions www.atmos-chem-phys-discuss.net 1680-7367 1680-7375 8 4 2008 10.5194/acpd-8-12529-2008 http://www.atmos-chem-phys-discuss.net/8/12529/2008/ http://www.atmos-chem-phys-discuss.net/8/12529/2008/acpd-8-12529-2008.html http://www.atmos-chem-phys-discuss.net/8/12529/2008/acpd-8-12529-2008.pdf 12529 12560 2008-07-01 Using 3DVAR data assimilation system to improve ozone simulations in the Mexico City basin N. Bei bnf@mce2.org B. de Foy W. Lei M. Zavala L. T. Molina Molina Center for Energy and the Environment, La Jolla, CA, USA Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technolology, Cambridge, MA, USA Saint Louis University, Saint Louis, MO, USA This study investigates the improvement of ozone (O₃) simulations in the Mexico City basin using a three-dimensional variational (3DVAR) data assimilation system in meteorological modeling during the MCMA-2003 campaign. 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