GEOS-Chem chemistry mechanisms

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Revision as of 21:26, 30 September 2013 by Bmy (Talk | contribs) (Mechanisms in GEOS-Chem v9-02 and later versions)

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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 and variants

The NOx-Ox-hydrocarbon-aerosol (aka "full-chemistry") simulations have undergone several updates in recent GEOS-Chem versions. We provide a summary of recent updates made to the various mechanisms.

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 Full-chemistry or 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
Caltech isoprene scheme,
Paulot isoprene scheme
  • SMVGEAR
  • KPP

The bromine tracers and species were added to the standard mechanism just prior to the release of GEOS-Chem v9-01-03.

-Bob Y. 17:00, 30 September 2013 (EDT)

Mechanisms in GEOS-Chem v9-02 and later versions

Several modifications were made to the above-mentioned chemistry mechanisms in GEOS-Chem v9-02.

Mechanism Description Nickname Solvers
standard Full-chemistry or fullchem
  • SMVGEAR
  • KPP
SOA SOA
  • SMVGEAR
  • KPP-
Dicarbonyls
  • NOx-Ox-hydrocarbon-aerosol species
  • PLUS dicarbonyl species
Dicarbonyls
  • SMVGEAR only

--Bob Y. 17:22, 30 September 2013 (EDT)

Solvers