Air quality in North America’s most populous city – overview of MCMA-2003 Campaign

1 Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, Cambridge, MA, USA 2 Molina Center on Energy and Environment, La Jolla, CA, USA 3 Aerodyne Research, Inc., Billerica, MA, USA 4 Saint Louis University, St. Louis, MO, USA 5 Laboratory for Atmospheric Research, Department of Civil and Environmental Engineering, Washington State University, Pullman, WA, USA 6 Department of Meteorology, Pennsylvania State University, University Park, PA, USA 7 Dept. of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, CO, USA 8 Cooperative Institute for Research in the Environmental Sciences (CIRES), University of Colorado at Boulder, Boulder, CO, USA 9 Department of Chemistry and Biochemistry, University of California at San Diego, San Diego, CA, USA