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

  [2016/09] 12th CHIMERE Training Course: September, 14-16, 2016
  [2016/07] Release of the 2016a version
  [2016/06] Update of the 'articles' page
  [2016/04] Article about the on-line development submitted to GMDD
  [2016/02] New CHIMERE logo

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).

Ozone surface concentrations
using the hemispheric domain

What's new in the chimere2016a release?

  • The mesh generation and management was changed and you can now run the model on hemispheric domains. These domains may be manually defined or directly those of WRF (if using this meteo model).
  • All required forcings databases are now global and with high spatial resolution. This includes databases for mineral dust emissions, now calculated over any domain and the possible use of the [Kok, 2014] production model
  • Many processes are better estimated during the simulation:
    • The CFL was optimized and the model runs faster
    • The aerosol growth now depends on humidity
    • The boundary conditions are more realistic in case of nesting
    • A new resuspension scheme (for urbanized areas) was added
    • The SAPRC-07A chemical scheme was added, including chlorine chemistry
    • The LAI is now read in time-dependent databases
  • Lidar profiles are calculated on-line
  • The gas and aerosol tracers interface is easier to use
  • The aerosol size distribution is optimized
  • The FastJ use and the AOD calculation is more robust and precise (less dependent on the bins numbers and values).

Numeric and software
  • All code sources are now in the same directory
  • For the parallelization, the Master was removed
  • The PnetCDF libraries are now used to read and write data
  • Meteorological and chemical outputs are all in the output file (removal of the meteo file)
  • The whole code uses dynamical arrays allocation
  • Each aerosol are outputed in a single array (bDUST in place of p01DUST, ... for example) where the additional dimension is the number of bins.

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 Dmitry KHVOROSTYANOV and Laurent MENUT.