## Abstract

The transport and conversion of chemically active compounds in the atmosphere is mathematically described by

(1.1)

where cs are the concentrations of chemical species in the atmosphere. The first term denotes the rate of change of c s and the second term describes the transport of species by a given wind field u. The first term on the right hand side represents the sub-grid scale vertical transport that is not resolved on the grid. Finally, the last term describes the chemical reactions among the species. Usually, Eq. (1.1) is discretized in space with finite volume techniques (e.g. Zlatev 1995). The discretized equations are normally integrated forward in time using operator splitting. In this way, small time steps due to the stiff chemistry and vertical mixing operators can be avoided by applying tailored implicit schemes (Verwer et al. 1998).

^{∂cs}_{∂t}+∇⋅(uc_{s})=V(c_{s})+R_{s}(c)(1.1)

where cs are the concentrations of chemical species in the atmosphere. The first term denotes the rate of change of c s and the second term describes the transport of species by a given wind field u. The first term on the right hand side represents the sub-grid scale vertical transport that is not resolved on the grid. Finally, the last term describes the chemical reactions among the species. Usually, Eq. (1.1) is discretized in space with finite volume techniques (e.g. Zlatev 1995). The discretized equations are normally integrated forward in time using operator splitting. In this way, small time steps due to the stiff chemistry and vertical mixing operators can be avoided by applying tailored implicit schemes (Verwer et al. 1998).

Original language | English |
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Title of host publication | Air Pollution Modelling and Simulation |

Subtitle of host publication | Proceedings Second Conference on Air Pollution Modelling and Simulation, APMS’01 Champs-sur-Marne, April 9–12, 2001 |

Editors | Bruno Sportisse |

Place of Publication | Berlin |

Publisher | Springer |

Pages | 225-234 |

ISBN (Electronic) | 978-3-662-04956-3 |

ISBN (Print) | 978-3-642-07637-4 |

Publication status | Published - 2002 |

Event | 2nd Conference on Air Pollution Modelling and Simulation, APMS 2001 - Champs-sur-Marne, France Duration: 9 Apr 2001 → 12 Apr 2001 Conference number: 2 |

### Conference

Conference | 2nd Conference on Air Pollution Modelling and Simulation, APMS 2001 |
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Abbreviated title | APMS |

Country/Territory | France |

City | Champs-sur-Marne |

Period | 9/04/01 → 12/04/01 |

## Keywords

- METIS-205899