GEOS-Chem chemistry mechanisms

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On this page, we provide an overview of the chemistry mechanisms used in GEOS-Chem.

Overview

NOx-Ox-hydrocarbon-aerosol chemistry

The standard NOx-Ox-hydrocarbon-aerosol (aka "full-chemistry") simulation has undergone several updates in recent GEOS-Chem versions. We

Mechanisms in GEOS-Chem v9-01-03 and prior versions

In GEOS-Chem v9-01-03, users could select from one of four pre-defined chemistry mechanisms:

Mechanism Description Nickname Solvers
standard
  • NOx-Ox-hydrocarbon-aerosol species
fullchem SMVGEAR, KPP
SOA
  • NOx-Ox-hydrocarbon-aerosol species
  • PLUS secondary organic aerosol species
SOA SMVGEAR, KPP
Dicarbonyls
  • NOx-Ox-hydrocarbon-aerosol species
  • PLUS dicarbonyl species
Dicarbonyls SMVGEAR only
isoprene
  • NOx-Ox-hydrocarbon-aerosol species
  • PLUS isoprene oxidation products
Paulot isoprene scheme SMVGEAR, KPP


Prior to the release of GEOS-Chem v9-01-03, several new bromine tracers and species were added to the standard mechanism.

--Bob Y. 16:56, 30 September 2013 (EDT)

Mechanisms in GEOS-Chem v9-02 and later versions

Solvers