Changes in Emissions in Megacities during the Past Decades: Impact on the Distribution of Atmospheric Compounds

El Hadji Thierno Doumbia1, Claire Granier2, Katerina Sindelarova3, Simone Tilmes4, Idir Bouarar5, Andreas Richter6, Andreas Hilboll7, Andrew J Conley8, Rolando R Garcia4, Douglas Edward Kinnison9, J F Lamarque4, Daniel Robert Marsh10, Anne K Smith4, Ryan Neely11 and Steven Turnock12, (1)LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales, Paris Cedex 05, France, (2)CIRES, Boulder, CO, United States, (3)LATMOS/IPSL, Paris, France, Paris, France, (4)National Center for Atmospheric Research, Boulder, CO, United States, (5)Max Planck Institute for Meteorology, Hamburg, Germany, (6)University of Bremen, Institute of Environmental Physics, Bremen, Germany, (7)University of Bremen, Bremen, Germany, (8)National Center for Atmospheric Research, Atmospheric Chemistry Observations & Modeling, Boulder, CO, United States, (9)NCAR, Boulder, CO, United States, (10)National Center for Atmospheric Research, High Altitude Observatory, Boulder, CO, United States, (11)University of Leeds, Leeds, United Kingdom, (12)Met Office Hadley Centre, Exeter, United Kingdom