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| − | On this page, we provide an overview of the chemistry mechanisms used in GEOS-Chem.
| + | #REDIRECT [[Simulations using KPP-built mechanisms]] |
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| − | == Overview ==
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| − | GEOS-Chem can perform many different types of chemical simulations, including:
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| − | *Several detailed ozone chemistry mechanisms
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| − | *Specialty simulations for tracers with simpler chemistry, including
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| − | **Radon-Lead-Beryllium
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| − | **Carbon gases (CO, CO2)
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| − | **Mercury
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| − | **Methane
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| − | **etc.
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| − | You may find more information about each of these mechanisms in the subsections below.
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| − | --[[User:Bmy|Bob Y.]] 10:08, 1 October 2013 (EDT)
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| − | == NOx-Ox-hydrocarbon-aerosol chemistry and variants ==
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| − | The NOx-Ox-hydrocarbon-aerosol (aka "full-chemistry") simulations have undergone several updates in recent GEOS-Chem versions. We provide a summary of these updates in this section.
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| − | === Mechanisms in GEOS-Chem v9-01-03 and prior versions ===
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| − | In GEOS-Chem v9-01-03, users could select from one of four pre-defined chemistry mechanisms:
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| − | {| border=1 cellspacing=0 cellpadding=5
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| − | |-bgcolor="#CCCCCC"
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| − | !width="100px"|Mechanism
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| − | !width="500x"|Description
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| − | !width="175px"|Nickname
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| − | !width="150px"|Solvers
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| − | |[[NOx-Ox-HC-aerosol|standard]]
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| − | *NOx-Ox-hydrocarbon-aerosol species
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| − | *PLUS [[Bromine chemistry mechanism|bromine species]]
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| − | |Full-chemistry,<br>fullchem
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| − | *SMVGEAR
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| − | *KPP
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| − | |[[Secondary organic aerosols|SOA]]
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| − | *NOx-Ox-hydrocarbon-aerosol species
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| − | *PLUS secondary organic aerosol species
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| − | |SOA
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| − | *SMVGEAR
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| − | *KPP-
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| − | |[[Dicarbonyls simulation|Dicarbonyls]]
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| − | *NOx-Ox-hydrocarbon-aerosol species
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| − | *PLUS dicarbonyl species
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| − | |Dicarbonyls
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| − | *SMVGEAR only
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| − | |[[New isoprene scheme|isoprene]]
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| − | *NOx-Ox-hydrocarbon-aerosol species
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| − | *PLUS isoprene oxidation products
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| − | |Caltech isoprene scheme,<br>Paulot isoprene scheme
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| − | *SMVGEAR
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| − | *KPP
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| − | The [[Bromine chemistry mechanism|bromine tracers and species]] were added to the standard mechanism just prior to the release of [[GEOS-Chem v9-01-03]].
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| − | -[[User:Bmy|Bob Y.]] 17:00, 30 September 2013 (EDT)
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| − | === Mechanisms in GEOS-Chem v9-02 and later versions ===
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| − | Several modifications were made to the [[#Mechanisms in GEOS-Chem v9-01-03 and prior versions|above-mentioned chemistry mechanisms]] in [[GEOS-Chem v9-02]], as listed below:
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| − | {| border=1 cellspacing=0 cellpadding=5
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| − | |-bgcolor="#CCCCCC"
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| − | !width="100px"|Mechanism
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| − | !width="500px"|Description
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| − | !width="175px"|Nickname
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| − | !width="150px"|Solvers
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| − | |-valign="top"
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| − | |[[NOx-Ox-HC-aerosol|standard]]
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| − | *[[NOx-Ox-HC-aerosol|NOx-Ox-hydrocarbon-aerosol]] species
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| − | *PLUS [[Bromine chemistry mechanism|bromine species]]
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| − | *PLUS [[Updating_standard_chemistry_with_JPL_10-6|Updates to inorganic chemistry reactions (cf. JPL 10-6)]]
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| − | *PLUS [[Methyl peroxy nitrate chemistry]]
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| − | *PLUS [[New isoprene scheme|Isoprene oxidation species chemistry (aka "Caltech isoprene scheme")]]
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| − | *PLUS [[New_isoprene_scheme#Update_One_-_RO2.2BHO2_Reaction_Rate|Fix RO2+HO2 rate constant]]
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| − | *PLUS [[New_isoprene_scheme#NO3_aerosol_reactive_uptake_coefficient|Increase of NO3 uptake by aerosol]]
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| − | *PLUS [[NOx-Ox-HC-aerosol#Removal_of_NOx_and_Ox_partitioning|Removal of NOx and Ox partitioning]]
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| − | *PLUS [[ChemTelecon20111202|Inhibition of N2O5 uptake by nitrate aerosol]]
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| − | *PLUS [[NOx-Ox-HC-aerosol#Improved_HO2_uptake|Improved HO2 uptake by aerosol]]
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| − | |Full-chemistry,<br>fullchem
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| − | *SMVGEAR
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| − | *KPP
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| − | |[[Secondary organic aerosols|SOA]]
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| − | *Everything in the "standard" simulation listed above
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| − | *PLUS Updated SOA species
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| − | *PLUS [[Secondary_organic_aerosols#SOA_simulation_with_semi-volatile_POA|Semi-volatile primary organic aerosol (OPTIONAL)]]
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| − | |SOA
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| − | *SMVGEAR
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| − | *KPP-
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| − | |[[Dicarbonyls simulation|Dicarbonyls]]
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| − | *NOx-Ox-hydrocarbon-aerosol species
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| − | *PLUS dicarbonyl species
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| − | |Dicarbonyls
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| − | *SMVGEAR only
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| − | |}
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| − | Starting with v9-02, family tracers (NOx, Ox) have now been removed from all GEOS-Chem mechanisms. The individual family members (NO, NO2, O3, etc.) are now carried as individual advected tracers and chemical species. Also, the isoprene mechanism from v9-01-03 now has been folded into the standard mechanism.
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| − | --[[User:Bmy|Bob Y.]] 09:56, 1 October 2013 (EDT)
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| − | === Chemistry mechanisms in GEOS-Chem v10 ===
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| − | We propose adding the [[UCX chemistry mechanism|'''Unified tropospheric-stratospheric Chemistry eXtension''' (UCX) mechanism]] into the release following v9-02. UCX, which was developed by Steven Barrett's group (the [http://lae.mit.edu MIT Laboratory for Aviation and the Environment]), combines the existing GEOS-Chem [[NOx-Ox-HC-aerosol|"standard" mechanism]] (based on [[GEOS-Chem v9-01-03|v9-01-03]]) with several new stratospheric species and reactions.
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| − | Because UCX will be a major update to GEOS-Chem, we propose naming the version in which it ships to GEOS-Chem v10-01. This will make it easier to denote versions that contain UCX from versions that do not.
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| − | --[[User:Bmy|Bob Y.]] 10:04, 1 October 2013 (EDT)
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| − | === Solvers ===
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