1National Center for Atmospheric Research, Boulder, CO, USA
2Centre National de la Recherche Scientifique, Paris, France
3NOAA, Earth System Research Laboratory, Boulder, CO, USA
4Boeing Company, Seattle, WA, USA
5Max-Planck-Institute for Meteorology, Hamburg, Germany
*now at: Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA
**now at: Tech-X Corporation, Boulder, CO, USA
***now at: Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
Received: 06 Aug 2009 – Discussion started: 27 Aug 2009
Abstract. The Model for Ozone and Related chemical Tracers, version 4 (MOZART-4) is an offline global chemical transport model particularly suited for studies of the troposphere. The updates of the model from its previous version MOZART-2 are described, including an expansion of the chemical mechanism to include more detailed hydrocarbon chemistry and bulk aerosols. Online calculations of a number of processes, such as dry deposition, emissions of isoprene and monoterpenes and photolysis frequencies, are now included. Results from an eight-year simulation (2000–2007) are presented and evaluated. The MOZART-4 source code and standard input files are available for download from the NCAR Community Data Portal (http://cdp.ucar.edu).
Revised: 07 Dec 2009 – Accepted: 08 Dec 2009 – Published: 12 Jan 2010
Emmons, L. K., Walters, S., Hess, P. G., Lamarque, J.-F., Pfister, G. G., Fillmore, D., Granier, C., Guenther, A., Kinnison, D., Laepple, T., Orlando, J., Tie, X., Tyndall, G., Wiedinmyer, C., Baughcum, S. L., and Kloster, S.: Description and evaluation of the Model for Ozone and Related chemical Tracers, version 4 (MOZART-4), Geosci. Model Dev., 3, 43-67, doi:10.5194/gmd-3-43-2010, 2010.