Submitted as: model description paper 21 Apr 2021

Submitted as: model description paper | 21 Apr 2021

Review status: a revised version of this preprint is currently under review for the journal GMD.

The CHIMERE v2020r1 online chemistry-transport model

Laurent Menut1, Bertrand Bessagnet1,a, Régis Briant1, Arineh Cholakian1, Florian Couvidat2, Sylvain Mailler1,3, Romain Pennel1, Guillaume Siour4, Paolo Tuccella5, Solène Turquety1, and Myrto Valari1 Laurent Menut et al.
  • 1Laboratoire de Météorologie Dynamique (LMD), Ecole Polytechnique, IPSL Research University, Ecole Normale Supérieure, Université Paris-Saclay, Sorbonne Universités, UPMC Univ Paris 06, CNRS, Route de Saclay, 91128 Palaiseau, France
  • 2INERIS, National Institute for Industrial Environment and Risks, Parc Technologique ALATA, F-60550 Verneuil-en-Halatte, France
  • 3Ecole des Ponts, Université Paris-Est, 77455 Champs-sur-Marne, France
  • 4Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Université Paris Est Créteil et Université de Paris, Institut Pierre Simon Laplace, Créteil, France
  • 5CETEMPS, Departement of Physical and Chemical Sciences and Center of Excellence in Telesening of Environment and Model Prediction of Severe Events, University of L’Aquila, Italy
  • anow at: European Commission, Joint Research Centre (JRC), Ispra, Italy

Abstract. The CHIMERE v2020r1 model replaces the v2017r5 version and provides numerous novelties. The most important of which is the online coupling with the WRF meteorological model, via the OASIS3-MCT external coupler. The model can still be used in offline mode; the online mode enables taking into account the direct and indirect effects of aerosols on meteorology. This coupling also enables using the meteorological parameters with sub-hourly time-steps. Some new parameterizations are implemented to increase the model performance and the user's choices: DMS emissions, additional schemes for SOA formation with VBS and H2O, improved schemes for mineral dust, biomass burning and sea-salt emissions. The NOx emissions from lightning is added. The model also includes the possibility to use the splitting-operator integration technique. The subgrid scale variability calculation of concentrations due to emission activity sectors is now possible. Finally, a new vertical advection scheme has been implemented, able to simulate more correctly long-range transport of thin pollutants plumes.

Laurent Menut et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gmd-2021-96', Anonymous Referee #1, 30 Jun 2021
    • AC1: 'Reply on RC1', Laurent Menut, 06 Sep 2021
  • RC2: 'Comment on gmd-2021-96', Anonymous Referee #2, 30 Jul 2021
    • AC1: 'Reply on RC1', Laurent Menut, 06 Sep 2021

Laurent Menut et al.

Laurent Menut et al.


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Short summary
The CHIMERE chemistry-transport model is presented in its new version, V2020r1. Many changes are proposed compared to the previous version. It includes online modelling, new parametetrizations for aerosols, new emissions schemes, a new parameter file format, the subgrid scale variability of urban concentrations and new transport schemes.