Difference between revisions of "GEOS-Chem chemistry mechanisms"

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On this page, we provide an overview of the chemistry mechanisms used in GEOS-Chem.
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__FORCETOC__
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'''''[[Guide to GEOS-Chem simulations|Previous]] | [[Aerosol-only simulation|Next]] | [[Guide to GEOS-Chem simulations]]'''''
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#<span style="color:blue">'''Simulations using KPP-built mechanisms'''</span>
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#[[Aerosol-only simulation]]
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#[[CH4 simulation]]
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#[[CO2 simulation]]
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#[[Mercury|Hg simulation]]
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#[[POPs simulation]]
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#[[Tagged CO simulation]]
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#[[Tagged O3 simulation]]
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#[[TransportTracers simulation]]
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On this page, we provide information about GEOS-Chem simulations that use chemistry mechanism solver code built by the [https://kpp.readthedocs.io Kinetic PreProcessor (KPP)].
  
 
== Overview ==
 
== Overview ==
  
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== NOx-Ox-hydrocarbon-aerosol chemistry and variants ==
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The following table provides links to information about the available full-chemistry mechanisms in GEOS-Chem.  
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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 recent updates made to the various mechanisms.
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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  
 
{| border=1 cellspacing=0 cellpadding=5  
 
|-bgcolor="#CCCCCC"
 
|-bgcolor="#CCCCCC"
 
!width="100px"|Mechanism
 
!width="100px"|Mechanism
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!width="500x"|Description
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!width="300px"|Description
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!width="175px"|Nickname
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!width="250px"|Mechanism file
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!width="150px"|Solvers
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!width="175px"|Extra options
  
 
|-valign="top"
 
|-valign="top"
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|[[NOx-Ox-HC-aerosol|standard]]
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|fullchem
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|NOx + Ox + Br + Cl + I + aerosols chemistry in the [[Tropospheric_chemistry_mechanism|troposphere]] and [[UCX_chemistry_mechanism|stratosphere]]
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|[https://github.com/geoschem/geos-chem/blob/main/KPP/fullchem/fullchem.eqn <tt>KPP/fullchem/fullchem.eqn</tt>]
 
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*NOx-Ox-hydrocarbon-aerosol species
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*[[GEOS-Chem_benchmarking|benchmark]]
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*PLUS [[Bromine chemistry mechanism|bromine species]]
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*complex SOA
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|Full-chemistry or fullchem
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*complex SOA + SVPOA
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*[[#TOMAS|TOMAS]]
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*SMVGEAR
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*[[#APM|APM]]
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*KPP
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*[[Coupling_GEOS-Chem_with_RRTMG|RRTMG]]
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*Aciduptake
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*Marine POA
  
 
|-valign="top"
 
|-valign="top"
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|[[Secondary organic aerosols|SOA]]
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|Hg
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|[[Mercury|Mercury chemistry]]
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*Introduced in [[GEOS-Chem 13.4.0|13.4.0]] as a KPP mechanism
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|[https://github.com/geoschem/geos-chem/blob/main/KPP/fullchem/fullchem.eqn <tt>KPP/Hg/Hg.eqn</tt>]
 
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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-
 
  
 
|-valign="top"
 
|-valign="top"
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|[[Dicarbonyls simulation|Dicarbonyls]]
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|carboncycle
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|[https://github.com/geoschem/geos-chem/blob/main/KPP/carboncycle/carboncycle.eqn <tt>KPP/carboncycle/carboncycle.eqn</tt>]
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*Will debut in [[GEOS-Chem 14.1.0|14.1.0]] as a KPP mechanism
 
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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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|-valign="top"
 
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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 Yantosca]] ([[User talk:Bmy|talk]]) 14:22, 20 September 2022 (UTC)
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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 or fullchem
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*SMVGEAR
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*KPP
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|-valign="top"
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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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|-valign="top"
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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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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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=== Solvers ===
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'''''[[Guide to GEOS-Chem simulations|Previous]] | [[Aerosol-only simulation|Next]] | [[Guide to GEOS-Chem simulations]]'''''

Latest revision as of 14:38, 18 October 2023

Previous | Next | Guide to GEOS-Chem simulations

  1. Simulations using KPP-built mechanisms
  2. Aerosol-only simulation
  3. CH4 simulation
  4. CO2 simulation
  5. Hg simulation
  6. POPs simulation
  7. Tagged CO simulation
  8. Tagged O3 simulation
  9. TransportTracers simulation

On this page, we provide information about GEOS-Chem simulations that use chemistry mechanism solver code built by the Kinetic PreProcessor (KPP).

Contents

Overview

The following table provides links to information about the available full-chemistry mechanisms in GEOS-Chem.

Mechanism Description Mechanism file Extra options
fullchem NOx + Ox + Br + Cl + I + aerosols chemistry in the troposphere and stratosphere KPP/fullchem/fullchem.eqn
Hg Mercury chemistry
  • Introduced in 13.4.0 as a KPP mechanism
 KPP/Hg/Hg.eqn
carboncycle KPP/carboncycle/carboncycle.eqn
  • Will debut in 14.1.0 as a KPP mechanism

--Bob Yantosca (talk) 14:22, 20 September 2022 (UTC)

Previous | Next | Guide to GEOS-Chem simulations

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