A multi-scale chemistry-transport model for atmospheric composition analysis and forecast

Mineral dust surface concentrations for a high resolution hemispheric simulation


  • [2018/07] Biomass burning programs are now available in the section [Fires]
  • [2018/07] Update for the libraries to use with CHIMERE .
  • [2018/07] 14th CHIMERE training course
  • [2018/02] The OPTSIM code, numerical tool for gas and particles radiative properties modeling, in free access.
  • [2017/07] Publication of the [Mailler et al., 2017] GMD paper about the 2017 version.
  • [2017/07] Update of the 'articles' page
  • [2017/03] Release of the 2017 version
  • [2016/04] Article [Briant et al., 2017] about the on-line development.

Short model description
The CHIMERE multi-scale model is primarily designed to produce daily forecasts of ozone, aerosols and other pollutants and make long-term simulations (entire seasons or years) for emission control scenarios. CHIMERE runs over a range of spatial scale from the regional scale (several thousand kilometers) to the urban scale (100-200 Km) with resolutions from 1-2 Km to 100 Km. On this server, documentation and source codes are proposed for the complete multi-scale model. CHIMERE proposes many different options for simulations which make it also a powerful research tool for testing parameterizations, hypotheses. CHIMERE is a parallel model that has been tested on machines ranging from desktop PCs running the GNU/Linux operating system, to massively parallel supercomputers (HPCD at ECMWF).

What's new in the chimere2017 release?

  • New parameterizations for sea salt emissions.
  • Optimization of AOD calculation for mineral dust
  • Evaporation of secondary inorganic aerosols takes into account the gas/particle partitioning.
  • Adjustment of some constants in model parameterizations (cut-off relative humidity for aerosol processes, deep convection activation threshold).
  • In case of identical horizontal domain to that of WRF is taken into account, direct use of its surface pressure.

Numeric and software
  • Separation of biogenic and sea salt emissions processing. The resulting emissions are saved respectively in BEMISSIONS.nc and SEMISSIONS.nc files.
  • Changed order of (optional) arguments to chimere.sh; possibility to specify simulation end hour.
  • New soil categories processing with a high-resolution database for the GREENFRAC variable
  • Taking into account metal oxydes in reactions of SO2 with Fe and Mn
  • Several bug fixes

The model code: sources, documentation, publications


  • Who and where for the development (developers and main contributors)
  • Contact the developers: chimere@lmd.polytechnique.fr
  • Register on the users mailing list

    Other informations

  • Web sites for forecasts, including the operational system.
  • Previous model versions documentations

  • Maps of the CHIMERE users

    About this website:
    This server is designed to provide source codes of the model, data from long-term simulations, and experimental forecasts made at IPSL. All data provided on this server should be used in a professional context.
    The CHIMERE model is provided under the GNU General Public License (since 2000)
    Copyright (C) Institut Pierre-Simon Laplace, Ecole Polytechnique, INERIS, CNRS.
    This server is located at the Ecole Polytechnique and maintened by Laurent MENUT.