User-editable configuration files

In the KPP/custom folder within the GEOS-Chem source code, you will find two files that define the chemical mechanism:

custom.eqn

The custom.eqn configuration file contains:

  • List of active species

  • List of inactive species

  • Gas-phase reactions

  • Heterogeneous reactions

  • Photolysis reactions

gckpp.kpp

The gckpp.kpp configuration file contains:

  • Solver options

  • Production and loss family definitions

  • Functions to compute reaction rates

  • Global definitions