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Volume 10, issue 4 | Copyright
Geosci. Model Dev., 10, 1467-1485, 2017
https://doi.org/10.5194/gmd-10-1467-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Model description paper 11 Apr 2017

Model description paper | 11 Apr 2017

ASIS v1.0: an adaptive solver for the simulation of atmospheric chemistry

Daniel Cariolle1,2, Philippe Moinat1, Hubert Teyssèdre3,†, Luc Giraud4, Béatrice Josse3, and Franck Lefèvre5 Daniel Cariolle et al.
  • 1Climat, Environnement, Couplages et Incertitudes, UMR5318 CNRS/Cerfacs, Toulouse, France
  • 2Météo-France, Toulouse, France
  • 3Centre National de Recherches Météorologiques, UMR3589 CNRS/Météo-France, Toulouse, France
  • 4Institut National de Recherche en Informatique et en Automatique, Talence, France
  • 5Laboratoire Atmosphères, Milieux, Observations Spatiales, CNRS/UPMC/UVSQ, Paris, France
  • deceased, April 2013

Abstract. This article reports on the development and tests of the adaptive semi-implicit scheme (ASIS) solver for the simulation of atmospheric chemistry. To solve the ordinary differential equation systems associated with the time evolution of the species concentrations, ASIS adopts a one-step linearized implicit scheme with specific treatments of the Jacobian of the chemical fluxes. It conserves mass and has a time-stepping module to control the accuracy of the numerical solution. In idealized box-model simulations, ASIS gives results similar to the higher-order implicit schemes derived from the Rosenbrock's and Gear's methods and requires less computation and run time at the moderate precision required for atmospheric applications. When implemented in the MOCAGE chemical transport model and the Laboratoire de Météorologie Dynamique Mars general circulation model, the ASIS solver performs well and reveals weaknesses and limitations of the original semi-implicit solvers used by these two models. ASIS can be easily adapted to various chemical schemes and further developments are foreseen to increase its computational efficiency, and to include the computation of the concentrations of the species in aqueous-phase in addition to gas-phase chemistry.

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This article reports on the development and tests of the adaptive semi-implicit scheme (ASIS) solver for the simulation of atmospheric chemistry. To solve the ordinary differential equations associated with the time evolution of the species concentrations, ASIS adopts a one-step linearized implicit scheme. It conserves mass and has a time-stepping module to control the accuracy of the numerical solution. ASIS was found competitive in terms of computation cost against higher-order schemes.
This article reports on the development and tests of the adaptive semi-implicit scheme (ASIS)...
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