Mean OH concentration: Difference between revisions

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On this page we track the evolution of the mean OH concentration in GEOS-Chem.  This value is an indicator of how "hot" the chemistry is.  Please also see the related topic about the [[Methyl chloroform lifetime|methyl chloroform lifetime in GEOS-Chem]].
On this page we track the evolution of the mean OH concentration in GEOS-Chem.  This value is an indicator of how "hot" the chemistry is.  Please also see the related topic about the [[Methyl chloroform lifetime|methyl chloroform lifetime in GEOS-Chem]].
== Computation of the mean OH diagnostic ==
Routine <tt>DO_DIAG_OH</tt> (in module <tt>GeosCore/diag_oh_mod.F</tt>) sums up the tropospheric air mass and mass-weighted OH mass after each call to the chemistry solver.  The summing happens in these lines of code:
 
      ! Skip non-chemistry boxes
      IF ( .not. State_Met%InChemGrid(I,J,L) ) CYCLE
      ! Dry air density [molec/cm3]
      ! Cast to REAL*8 to avoid underflow
      AIRDENS_8      = State_Met%AIRNUMDEN(I,J,L)
      ! Box volume [cm3]
      ! Cast to REAL*8 to avoid underflow
      VOLUME_8        = State_Met%AIRVOL(I,J,L) * 1e+6_fp
      ! Sum air mass term into AIR_MASS array
      XAIRMASS        = AIRDENS_8        * VOLUME_8
      AIR_MASS(I,J,L) = AIR_MASS(I,J,L)  + XAIRMASS
      ! Sum OH mass term into OH_MASS array
      XOHMASS        = State_Chm%Species(I,J,L,id_OH) * XAIRMASS
      OH_MASS(I,J,L)  = OH_MASS(I,J,L)    + XOHMASS
where the arrays contain the following quantities:
  I,J,L                          = 3-D array indices
  AIRDENS_8                      = air density [molec/cm3]
  VOLUME_8                        = grid box volume [cm3]
  AIR_MASS(I,J,L)                = air mass [molec air]
  State_Chm%Species(I,J,L,id_OH)  = OH concentration [molec OH/cm3] 
  OH_MASS(I,J,L)                  = mass-weighted OH = OH mass * air mass [molec OH/cm3 * molec air]
After the GEOS-Chem simulation finishes, the mean OH value is printed out in subroutines <tt>PRINT_MEAN_OH</tt> (in module <tt>GeosCore/diag_oh_mod.F</tt>):
  ! Total Mass-weighted OH [molec OH/cm3] * [molec air]
  SUM_OHMASS = SUM( OH_MASS )
  ! Atmospheric air mass [molec air]
  SUM_MASS  = SUM( AIR_MASS )
         
  ! Divide OH [molec OH/cm3 * molec air] by [molec air] and report as [1e5 molec/cm3]
  OHCONC = ( SUM_OHMASS / SUM_MASS ) / 1d5
  ! Write value to log file
  WRITE( 6, '(/,a)' ) REPEAT( '=', 79 )
  WRITE( 6, *      ) 'ND23: Mass-Weighted OH Concentration'
  WRITE( 6, *      ) 'Mean OH = ', OHCONC, ' [1e5 molec/cm3]'
  WRITE( 6, '(  a)' ) REPEAT( '=', 79 )
       
Typical values are around 10<sup>5</sup> or 11<sup>5</sup> molec/cm3.
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 19:43, 29 March 2018 (UTC)


== Evolution of mean OH in GEOS-Chem ==
== Evolution of mean OH in GEOS-Chem ==
Line 58: Line 5:
=== Plot of mean OH evolution ===
=== Plot of mean OH evolution ===


Here is a plot of the mean OH concentration from GEOS-Chem 1-year benchmark simulations through [[GEOS-Chem 12#12.8.0|version 12.8.0]] (released 04 May 2020).  The mean OH is an indicator how the chemistry mechanism is performing. Typical values are 10–12 x 10<sup>5</sup> molecules cm<sup>-1</sup>.
Here is a plot of the mean OH concentration from GEOS-Chem 1-year benchmark simulations.  The mean OH is an indicator how the chemistry mechanism is performing. Typical values are 10–12 x 10<sup>5</sup> molecules cm<sup>-1</sup>.
 
[[Image:GC_Mean_OH_12.8.0.png]]
 
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 17:01, 21 May 2020 (UTC)
 
=== Mean OH in GEOS-Chem 12 ===
 
The following table chronicles the evolution of the mean OH value from several different GEOS-Chem simulations.  All benchmark simulations were conducted at [[GEOS-Chem_horizontal_grids#GMAO_4_x_5_grid|4&deg; x 5&deg; resolution]] unless noted otherwise.
 
{| border=1 cellspacing=0 cellpadding=5
|- bgcolor="#CCCCCC"
!width="125px"|Benchmark
!width="100px"|Met Fields & Year
!width="125px"|Mean OH<br>[10<sup>5</sup> molec cm<sup>-3</sup>]
!width="125px"|Change from<br>prev. version<br>[10<sup>5</sup> molec cm<sup>-3</sup>]
!width="500px"|Important updates in this benchmark simulation
!width="175px"|References
 
|-valign="top"
|[[Benchmark/GEOS-Chem 12.8.0#1-year benchmark overview|12.8.0]]
|GEOS-FP 2016
|<tt>10.613</tt>
|<tt>+0.108<br>(+1.02%)</tt>
|'''Updates introduced in [[GEOS-Chem 12#12.8.0|12.8.0]]:'''
*[https://www.atmos-chem-phys.net/19/9613/2019/ Isoprene chemistry]
*[https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017GL075270 Wet deposition parameterization]
*[https://www.atmos-chem-phys-discuss.net/acp-2019-1043/ Ozone deposition to the ocean]
*Use online [[Mineral_dust_aerosols|DustDead]], [[MEGAN_v2.1_plus_Guenther_2012_biogenic_emissions|MEGAN]], [[Sea_salt_aerosols|SeaSalt]], and [[Hudman_et_al_2012_soil_NOx_emissions_algorithm|SoilNOx]] emissions for benchmark simulations
 
'''Updates introduced in [[GEOS-Chem 12#12.7.0|12.7.0]]:'''
*[https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018JD029046 Small alkyl nitrate chemistry]
*[https://www.atmos-chem-phys.net/19/9097/2019/acp-19-9097-2019.html Methanol as part of standard chemical mechanism]
*[[Leaf_area_indices_in_GEOS-Chem#Yuan_processed_MODIS_LAI|Update to Yuan processed MODIS LAI product (covering years 2005-2016)]]
*[https://github.com/geoschem/geos-chem/pull/78 Latitudinally and monthly resolved fixed surface concentrations for long-lived organohalogen species (1750-2014) and methane]
*[https://github.com/geoschem/geos-chem/issues/123 Fix incorrect uptake coefficient for N2O5 in heterogeneous chemistry]
|
 
|-valign="top"
|[[Benchmark/GEOS-Chem 12.6.0#1-year benchmark overview|12.6.0]]
|GEOS-FP 2016
|<tt>10.505</tt>
|<tt>-0.797<br>(-7.05%)</tt>
|'''Updates introduced in [[GEOS-Chem 12#12.6.0|12.6.0]]:'''
*[[GEOS-Chem_chemistry_mechanisms#Cloud_heterogeneous_chemistry|Combined heterogeneous chemistry updates]]
*[[Dry_deposition#Cold-temperature_dry_deposition_updates|HNO3 cold-temperature deposition]]
*[[GEOS-Chem_12#Quick_fix_for_aerosol_pH_calculation_when_dry|Quick fix for aerosol pH calculation when dry]]
*[[Secondary_organic_aerosols#Removal_of_VBS_isoprene_SOA|Remove isoprene in VBS]] (leaving aqueous)
*[[FAST-JX_v7.0_photolysis_mechanism#Updated_aerosol_hygroscopicity_and_optics|Updated aerosol hygroscopicity and optics]]
*[[DICE-Africa_anthropogenic_emissions_inventory#Add_EDGAR_BCPI_and_BCPO_emissions_for_remaining_sectors_to_DICE-Africa|Add EDGAR BCPI and BCPO emissions for remaining sectors to DICE-Africa]]
'''Updates introduced in [[GEOS-Chem 12#12.5.0|12.5.0]]:'''
*[[Issues_now_resolved_in_GEOS-Chem_12#Retire_obsolete_emission_inventories|Retire obsolete emission inventories]]
*[[Grid-independent_emissions#Biogenic_VOC_emissions|Updated offline biogenic emissions generated with GEOS-Chem 12.3.0]]
*[[Volcanic_SO2_emissions|Updated volcano emissions to include eruptive emissions through April 2018]]
*[[DICE-Africa_anthropogenic_emissions_inventory#Scale_DICE-Africa_emissions_to_address_errors_in_inventory|Scale DICE-Africa emissions to address errors in inventory]]
*[[Issues_now_resolved_in_GEOS-Chem_12#Bug_fix_for_C3H8_anthropogenic_emissions|Bug fix for C3H8 anthropogenic emissions]]
*[[Mineral_dust_aerosols#Separate_AFCID_from_DustDead_extension|Separate anthropogenic PM2.5 dust source from the DustDead extension]]
*[[Issues_now_resolved_in_GEOS-Chem_12#Corrections_for_CFCs_in_the_chemistry_mechanism|Corrections for CFCs in the chemistry mechanism]]
*[[Issues_now_resolved_in_GEOS-Chem_12#Fix_typo_in_CLD_PARAMS_routine_in_gckpp_HetRates.F90|Fix typo in CLD_PARAMS routine in gckpp_HetRates.F90]]
*[[Stratospheric_chemistry#Bug_fix:_make_sure_stratospheric_BrY_concentrations_are_read_properly_each_month|Bug fix: make sure stratospheric BrY concentrations are read properly each month]]
|
 
|-valign="top"
|[[Benchmark/GEOS-Chem 12.4.0#1-year benchmark overview|12.4.0]]
|GEOS-FP 2016
|<tt>11.302</tt>
|<tt>-.346<br>(-2.97%)</tt>
|'''Updates introduced in [[GEOS-Chem 12#12.4.0|12.4.0]]:'''
*[[Grid-independent_emissions#Lightning_NOx_emissions|Grid-independent lightning NOx emissions]] (3-hourly)
*[[Grid-independent_emissions#Biogenic_emissions|Grid-independent biogenic emissions]] (hourly)
*[[Grid-independent_emissions#Sea_salt_emissions|Grid-independent sea salt emissions]] (hourly)
*[[Grid-independent_emissions#Soil_NOx_emissions|Grid-independent soil NOx emissions]] (hourly)
*[[Volcanic_SO2_emissions#OMI-based_volcanic_emissions|Updated volcano emissions (1978-2019)]]
'''Updates introduced in [[GEOS-Chem 12#12.3.0|12.3.0]]:'''
*[[ISORROPIA_II#Investigating_persistent_noise_observed_in_ISORROPIA_output|Update ISORROPIA from v2.0 to v2.2, in order to remove persistent noise in output]]
*[[MEGAN_v2.1_plus_Guenther_2012_biogenic_emissions#Updated_PFT_file|Updated PFT file for MEGAN]]
*Read in and regrid existing MODIS LAI and OLSON data via HEMCO
'''Updates introduced in [[GEOS-Chem 12#12.2.0|12.2.0]]:'''
*[[Anthropogenic_emissions#BRAVO|Retire BRAVO emissions and use CEDS for Mexico instead]]
*[[EPA/NEI11_North_American_emissions#Update_mask_file_applied_to_NEI2011_emissions|Update mask file applied to NEI2011 emissions]]
'''Updates introduced in [[GEOS-Chem 12#12.1.0|12.1.0]]:'''
*[[List_of_diagnostics_archived_to_netCDF_format#The_Budget_collection|Budget diagnostics]]
*[[Mineral_dust_aerosols#Anthropogenic_PM2.5_dust_source_in_GEOS-Chem|Anthropogenic PM2.5 dust source]]
*[[GEOS-Chem restart files#Restart files in GEOS-Chem 12|GEOS-Chem restart file updates]]
*[[CEDS_anthropogenic_emissions#Add_missing_RCO_sector_to_CEDS_emissions_entries|Add missing RCO sector to CEDS emissions entries]]
*[[CEDS_anthropogenic_emissions#Include_CEDS_ship_emissions|Include CEDS ship emissions as default global ship emissions inventory]]
*[[GEOS-Chem 12#Allow_for_SZA_to_98_degrees_when_getting_photolysis_rates|Allow for SZA to 98 degrees when getting photolysis rates]]
|
 
|-valign="top"
|[[GEOS-Chem_12_benchmark_history#12.0.0-Run0|12.0.0]]
|GEOS-FP 2016
|<tt>11.648</tt>
|<tt>+0.116<br>(+0.101%)</tt>
|'''Updates introduced in [[GEOS-Chem_12_benchmark_history#12.0.0-Run0|12.0.0]]'''
*[[Trash_burning_emissions#Avoid_double_counting_trash_emissions|Turn off TRASH emissions by default to avoid double counting]]
*[[GEOS-Chem 12#Add_entries_to_HEMCO_Config.rc_for_SOAP_and_pFe_in_CEDS_inventory|Add entries to HEMCO_Config.rc for SOAP and pFe in CEDS inventory]]
*[[#Bug fix for liquid water content in gckpp_HetRates.F90|Bug fix for liquid water content in gckpp_HetRates.F90]]
*[[GEOS-Chem 12#Bug_fix_for_CH4_boundary_conditions|Bug fix for CH4 boundary conditions]]
*[[GEOS-Chem 12#Fixed typo in call to GAMMA_HOBr_AER|Fixed typo in call to GAMMA_HOBr_AER]]
*Correct issues when specifying [[DICE-Africa anthropogenic emissions inventory|DICE-Africa emissions]]:
**[[DICE-Africa_anthropogenic_emissions_inventory#Avoid_double-counting_between_DICE-Africa_and_other_inventories|Avoid double-counting between DICE-Africa and other inventories]]
**[[DICE-Africa_anthropogenic_emissions_inventory#Use_unique_names_for_DICE-Africa_entries_in_HEMCO_Config.rc|Use unique names for DICE-Africa entries in the <tt>HEMCO_Config.rc</tt> file]]
*[[Organics_Working_Group#Add_missing_Criegee_intermediate_reaction|Add missing Criegee intermediate reaction]]
*[[Ship_emissions#Fix_bug_in_ARCTAS_SHIP_SO2_scale_factors|Bug fix for ARCTAS_SHIP in <tt>HEMCO_Config.rc</tt> files]]
*[[FlexChem#FlexChem bug fix: do not zero ACTA, EOH, HCOOH|Bug fix in FlexChem: do not zero out ACTA, EOH, HCOOH concentrations]]
*[[GFED4_biomass_burning_emissions#Years_2015_and_2016_have_been_added|Add GFED4.1 data for 2015 and 2016; Use GFED4.1 2016 in benchmarks]]
|
 
|}
 
=== Mean OH in GEOS-Chem v11 ===
 
The following table chronicles the evolution of the mean OH value from several different GEOS-Chem simulations.  All benchmark simulations were conducted at [[GEOS-Chem_horizontal_grids#GMAO_4_x_5_grid|4&deg; x 5&deg; resolution]] unless noted otherwise.
 
{| border=1 cellspacing=0 cellpadding=5
|- bgcolor="#CCCCCC"
!width="125px"|Benchmark
!width="100px"|Met Fields & Year
!width="125px"|Mean OH<br>[10<sup>5</sup> molec cm<sup>-3</sup>]
!width="125px"|Change from<br>prev. version<br>[10<sup>5</sup> molec cm<sup>-3</sup>]
!width="500px"|Important updates in this benchmark simulation
!width="175px"|References
 
|-valign="top"
|[[GEOS-Chem v11-02 benchmark history#v11-02f-Run0|v11-02f-Run0]]
|GEOS-FP 2016
|<tt>11.532</tt>
|<tt>-0.009<br>(-0.077%)</tt>
|'''Updates introduced in [[GEOS-Chem v11-02#v11-02f|v11-02f]]:'''
*[[Implementation_of_HEMCO_in_GEOS-Chem#Features_added_in_v11-02f|Update HEMCO from v2.1.001 to v2.1.005]]
*[[MEGAN_v2.1_plus_Guenther_2012_biogenic_emissions#Global_0.25x0.25_MEGAN_input_and_MODIS_LAI|Use global 0.25x0.25 files for MEGAN input and MODIS LAI]]
*[[Lightning_NOx_emissions|Update lightning BETA values and OTD/LIS files for consistency with latest met fields]]
*[http://www.globalchange.umd.edu/ceds/ CEDS global anthropogenic emissions (1950-2014)]
*[[EDGAR_v4.3_anthropogenic_emissions|EDGAR v4.3.1 emissions]]
*[[CAC_anthropogenic_emissions#Historical_Canadian_emissions|Historical Canadian emissions]]
*[[Anthropogenic_emissions#C2H6|Global ethane emissions]]
*[[DICE-Africa anthropogenic emissions inventory|Inefficient combustion emissions in Africa (DICE-Africa inventory)]]
*[[Trash burning emissions]]
*[[GFED4_biomass_burning_emissions#Update_GFED4_emission_factors|Update GFED4 emission factors]]
*[[GFED3_biomass_burning_emissions|Retire GFED3 biomass burning emissions]]
*Ammonia emissions from Arctic seabirds
*[[GEOS-Chem_v11-02#Restore_use_of_prod.2Floss_rates_from_GMI_in_the_mesosphere_for_UCX-based_simulations|Restore use of prod/loss rates from GMI in the mesosphere for UCX-based simulations]]
*[[GEOS-Chem_v11-02#Fix_bug_in_units_of_UCX_P.2FL_rates|Fix bug in units of UCX prod/loss rates]]
*[[UCX_chemistry_mechanism#Fix_for_UCX_mesospheric_NOy_routine|Add fix for UCX mesospheric NOy routine]]
*[[Physical_properties_of_GEOS-Chem_species#Fix_Henry.27s_law_parameters_for_HCl|Fix Henry's Law parameters for HCl]]
*[[Halogen_chemistry_mechanism#Fix_for_N2O5_uptake|Fix for N2O5 uptake]]
*[[GEOS-Chem_v11-02#Fix_for_organic_nitrate_chemistry|Add fix for organic nitrate chemistry]]
|
*[[GEOS-Chem v11-02]]
 
|-valign="top"
|[[GEOS-Chem v11-02 benchmark history#v11-02e-Run1|v11-02e-Run1]]
|GEOS-FP 2016
|<tt>11.541</tt>
|<tt>-0.145<br>(-1.24%)</tt>
|Same as [[GEOS-Chem v11-02 benchmark history#v11-02e-Run0|v11-02e-Run0]], but
*Use GEOS-FP 2016 meteorology instead of GEOS-FP 2013 meteorology
|
*[[GEOS-Chem v11-02]]
 
|-valign="top"
|[[GEOS-Chem v11-02 benchmark history#v11-02e-Run0|v11-02e-Run0]]
|GEOS-FP 2016
|<tt>11.686</tt>
|<tt>-0.171<br>(-1.44%)</tt>
|'''Updates introduced in [[GEOS-Chem v11-02#v11-02e|v11-02e]]:'''
*[[NOx-Ox-HC-aerosol#Monthly mean surface distributions|Monthly mean surface methane distributions]]
*UCX updates, including:
**[[UCX_chemistry_mechanism#v11-02|Remove initial stratospheric 2D mixing ratio option]]
**[[UCX_chemistry_mechanism#UCX_stratospheric_water_boundary_condition_update|UCX stratospheric water boundary condition update]]
**[[UCX_chemistry_mechanism#Remove_UCX_.23ifdefs_and_replace_with_Input_Opt.25LUCX|Remove <tt>UCX=y</tt> as compile switch and use <tt>Input_Opt%LUCX</tt> instead]]
*[[Stratospheric_chemistry#Prod.2Floss_rates_from_UCX|Use monthly mean stratospheric prod/loss rates from UCX simulation for all species]]
*[[Aerosol_optical_properties#Add_BC_absorption_enhancement_factor|Update density of BC to 1.8 and add absorption enhancement factor in input.geos]]
*[[Sulfate_aerosols#Metal_catalyzed_oxidation_of_SO2|Metal catalyzed oxidation of SO2 as a switch]] (on by default)
*SOA updates and bug fixes, including:
**[[GEOS-Chem_v11-02#Remove_MONX_from_chemical_mechanisms|Remove MONX from chemical mechanisms]]
**[[Secondary_organic_aerosols#Add_MTPO_as_an_advected_and_chemical_species_to_all_full-chemistry_simulations|Add MTPO as a species in full-chemistry simulations]]
**[[Secondary_organic_aerosols#Update_simple_SOA_entries_in_HEMCO_to_follow_MTPA.2BLIMO.2BMTPO|Updating SOAP and SOAS entries in HEMCO to follow MTPA+LIMO+MTPO rather than MONX]]
**[[Secondary_organic_aerosols#Calculation_of_PM2.5.2C_AOD.2C_and_aerosol_mass|Use simple SOA in calculation of PM2.5, AOD, and aerosol mass by default]]
**[[Secondary_organic_aerosols#SOA_formation_from_aqueous_isoprene_uptake|Always use SOA formation from aqueous isoprene uptake (remove switch from input.geos)]]
**[[Secondary_organic_aerosols#Fixes_for_isoprene_SOA_for_consistency_with_Marais_et_al._.282016.29|Fixes for isoprene SOA for consistency with Marais et al. (2016)]]
*[[GEOS-Chem_v11-02#Fix_dust_rainout_settings_to_match_BCPO|Fix dust rainout settings to match BCPO]]
*[[Halogen_chemistry_mechanism#Fixes_in_gckpp_HetRates.F90_following_implementation_in_v11-02d|Fixes in gckpp_HetRates.F90  for halogen chemistry]] *[[Sulfate_aerosols#Add_bug_fix_in_sulfate_mod.F_involving_reorder_IF_statements_for_Fahey_and_Seinfeld_decision_algorithm|Add bug fix in sulfate_mod.F involving reorder IF statements for Fahey and Seinfeld decision algorithm]]
*[[Downloading_GEOS-Chem_source_code_and_data#Inconsistency_in_GEOS-FP_files_at_Harvard_and_Dalhousie_for_July_2013|Sync GEOS-FP files on Harvard ftp with files at Dalhousie]]
|
*[[GEOS-Chem v11-02]]
 
|-valign="top"
|[[GEOS-Chem v11-02 benchmark history#v11-02d-Run2|v11-02d-Run2]]
|GEOS-FP 2013
|<tt>11.857</tt>
|<tt>0.195<br>(1.672%)</tt>
|Everything in [[GEOS-Chem v11-02 benchmark history#v11-02d-Run0|v11-02d-Run0]], plus:
*Now fixes a bug in CHEM_SO2 that caused too much sulfate production
*[[UCX_chemistry_mechanism#Fix_bug_impacting_dust_radius_obtained_in_RDUST_ONLINE|Fix bug impacting dust radius obtained in RDUST_ONLINE for UCX simulations]]
*[[GEOS-Chem_v11-02#Add_fix_for_IPMN_reactions_contributing_to_high_P.28Ox.29_and_L.28NOx.29|Add fix for IPMN reactions contributing to high P(Ox) and L(Ox)]]
|
*[[GEOS-Chem v11-02]]
 
|-valign="top"
|[[GEOS-Chem v11-02 benchmark history#v11-02d-Run0|v11-02d-Run0]]
|GEOS-FP 2013
|<tt>11.662</tt>
|<tt>0.066<br>(0.569%)</tt>
|'''Updates introduced in [[GEOS-Chem v11-02#v11-02d|v11-02d]]:'''
*[[Halogen_chemistry_mechanism|Halogen chemistry updates]]
*[[Sulfate_aerosols#Sulfur_oxidation_by_reactive_halogens|Sulfur oxidation by reactive halogens]]
*[[GEOS-Chem_v11-02#Add_bug_fixes_for_GLYX.2C_MGLY.2C_IEPOX.2C_and_IMAE_heterogeneous_chemistry_added_in_v11-02c|Add bug fixes for GLYX, MGLY, IEPOX, and IMAE heterogeneous chemistry]]
|
*[[GEOS-Chem v11-02]]
 
|-valign="top"
|[[GEOS-Chem v11-02 benchmark history#v11-02c-Run0|v11-02c-Run0]]
|GEOS-FP 2013
|<tt>11.596</tt>
|<tt>-0.233<br>(-1.970%)</tt>
|'''Updates introduced in [[GEOS-Chem v11-02#v11-02c|v11-02c]]:'''
*[[Secondary_organic_aerosols#Simple_SOA_scheme|Enhance default GEOS-Chem simple SOA]]
*[[GEOS-Chem_chemistry_mechanisms#Updated_isoprene_and_monoterpene_chemistry|Updates to isoprene and monoterpene chemistry]]
*[[Secondary_organic_aerosols#SOA_formation_from_aqueous_isoprene_uptake|Add aqueous isoprene uptake to SOA scheme]]
*[[Chemistry_Issues#Fixes_for_carbon_creating_reactions|Carbon balance (fix C creation)]]
*[[PAN#Bug_fixes_for_EOH_and_MGLY|Fix bugs for EOH and MGLY following implementation of PAN updates in v11-02a]]
*[[Implementation_of_HEMCO_in_GEOS-Chem#Features_added_in_v11-02c|Update HEMCO from v2.0.004 to v2.1.001]]
|
*[[GEOS-Chem v11-02]]
 
|-valign="top"
|[[GEOS-Chem v11-02 benchmark history#v11-02a-Run1|v11-02a-Run1]]
|GEOS-FP 2013
|<tt>11.829</tt>
|<tt>.079<br>(0.672%)</tt>
|Same as in [[GEOS-Chem v11-02 benchmark history#v11-02a-Run0|v11-02a-Run0]], but:
*<span style="color:red">Partitioning of NOx biomass burning emissions directly to PAN and HNO3 has been removed</span>
|
*[[GEOS-Chem v11-02]]
 
|-valign="top"
|[[GEOS-Chem v11-02 benchmark history#v11-02a-Run0|v11-02a-Run0]]
|GEOS-FP 2013
|<tt>11.750</tt>
|<tt>-0.251<br>(-2.09%)</tt>
|'''Updates introduced in [[GEOS-Chem v11-02#v11-02a|v11-02a]]:'''
*[[Updates_in_JPL_Publication_15-10|Update chemistry rate constants based on ''JPL Publication 15-10'']]
*[[Chemistry_Issues#Fixes_to_correct_ALK4_lumping_issue|Fixes to correct ALK4 lumping issue]]
*[[PAN|PAN updates]], including:
**Updates to emissions, deposition, species, chemistry
**Ocean+biogenic ALD2 emissions from Millet al. [2010]
**<span style="color:red">Vertically distributed biomass burning emissions have been removed</span>
*[[EPA/NEI11_North_American_emissions#Monthly_mean_emissions|Monthly mean NEI2011 emissions]]
*Bug fixes in the GEOS-Chem sulfate module:
**[[Sulfate_aerosols#Fix_error_in_production_of_SO4s.2C_NITs_in_SEASALT_CHEM_routine|Fix error in production of SO4s and NITs in <tt>SEASALT_CHEM</tt>]]
**[[Sulfate_aerosols#Fix_bug_in_CHEM_NIT_routine|Fix bug in <tt>CHEM_NIT</tt>]]
**[[Sulfate_aerosols#Fix_for_sulfate_production_in_HET_DROP_CHEM|Fix for sulfate production in <tt>HET_DROP_CHEM</tt>]]
**[[Sulfate_aerosols#Fix_bugs_in_sulfate_chemistry_routines|Fix bugs in sulfate chemistry routines]]
*[[Dry_deposition#Bug_in_computation_of_aerodynamic_resistance_RA|Fix bug in dry deposition aerodynamic resistance]]
*[[GEOS-Chem_v11-01#Bug_in_cos.28SZA.29_for_start_of_timestep|Bug fix in cos(SZA) for start of timestep]]
*[[GEOS-Chem_v11-02#Include_TOA_pressure_when_calculating_dry_pressure_edges|Include TOA pressure when calculating dry pressure edges]]
|
*[[GEOS-Chem v11-02]]
 
|-valign="top"
|[[GEOS-Chem v11-01 benchmark history#v11-01-public-release-Run0|v11-01-public-release-Run0]]
|GEOS-FP 2013
|<tt>12.001</tt>
|<tt>-0.003<br>(-0.025%)</tt>
|'''Updates introduced in [[GEOS-Chem v11-01#v11-01 public release|v11-01 public release]]:'''
*[[Regridding_in_GEOS-Chem#Bug_fix:_MAP_A2A_now_only_uses_periodic_BCs_for_global_data|Bug fix: MAP_A2A now applies periodic boundary conditions only to global data sets during regridding]]
*[[Implementation_of_HEMCO_in_GEOS-Chem#Ocean_grid_boxes_now_use_the_timezone_of_the_nearest_land_mass_for_computing_emissions|Ocean grid boxes now use the timezone of the nearest land mass for computing emissions]]
|
*[[GEOS-Chem v11-01]]
 
|-valign="top"
|[[GEOS-Chem v11-01 benchmark history#v11-01k-Run0|v11-01k-Run0]]
|GEOS-FP 2013
|<tt>12.004</tt>
|<tt>-0.065<br>(-.538%)</tt>
|'''Updates introduced in [[GEOS-Chem v11-01#v11-01h|v11-01h]]:'''
*[[GEOS-Chem_v11-01#Incorrect_incorporation_of_moisture_in_GEOS-Chem_air_quantities|Fix to remove moisture signature in dry mixing ratio]]
'''Updates introduced in [[GEOS-Chem v11-01#v11-01i|v11-01i]]:'''
*[[Wet_deposition#Fix_bug_in_GEOS-FP.2FMERRA.2FMERRA-2_re-evaporation_calculation|Fix bug in GEOS-FP/MERRA/MERRA-2 re-evaporation calculation]]
'''Updates introduced in [[GEOS-Chem v11-01#v11-01j|v11-01j]]:'''
*[[Implementation_of_HEMCO_in_GEOS-Chem#Features_added_in_v11-01j|Update to HEMCO v2.0.003]], includes:
**Bug fix for PARANOX extension
**Fix for ocean overlap in timezones mask file
*[[CAC_anthropogenic_emissions#High_resolution_emissions|0.1&deg; x 0.1&deg; CAC emissions]]
*[[Implementation_of_RETRO_Anthropogenic_Emissions#RETRO_anthropogenic_propane_emissions_are_too_low|Replace RETRO C3H8 emissions with emissions from Xiao 2008]], includes:
**Overwrite Xiao C2H6 and C3H8 with MIX and NEI2011 regional inventories
*[[EDGAR_v4.2_anthropogenic_emissions#Correct_bug_in_units_of_EDGAR_v4.2_SO2_emissions|Correct bug in units of EDGAR v4.2 SO2 emissions]]
*[[EDGAR_v4.2_anthropogenic_emissions#Prevent_biofuel_emissions_from_being_double_counted|Prevent biofuel emissions from being double counted in EDGAR v4.2]]
*[[New_isoprene_scheme#Set_ACTA_and_HCOOH_to_active_in_globchem.dat|Set ACTA and HCOOH to active]]
*[[UCX_chemistry_mechanism#Fix_for_mesospheric_NOx_chemistry|Fix for mesospheric NOx chemistry]]
*[[GEOS-Chem v11-01#Fix_molecular_weight_of_N2O5|Fix molecular weight of N2O5]]
'''Updates introduced in [[GEOS-Chem v11-01#v11-01k|v11-01k]]:'''
*[[Lightning_NOx_emissions#Update_WEST_NS_DIV_to_fix_ozone_overestimate_in_southern_US|Lightning update based on Travis et al. (2016, ACP) and Zhang et al. (2014, ACP)]]
|
*[[GEOS-Chem v11-01]]
 
|-valign="top"
|[[GEOS-Chem v11-01 benchmark history#v11-01g-Run0|v11-01g-Run0]]
|GEOS-FP 2013
|<tt>12.069</tt>
|<tt>0.025<br>(0.207%)</tt>
|'''Updates introduced in [[GEOS-Chem v11-01#v11-01g|v11-01g]]:'''
*[[FlexChem]]
|
*[[GEOS-Chem v11-01]]
 
|-valign="top"
|[[GEOS-Chem_v11-01_benchmark_history#v11-01f-geosfp-Run0|v11-01f-geosfp-Run0]]
|GEOS-FP 2013
|<tt>12.044</tt>
|<tt>0.033<br>(0.275%)</tt>
||'''Updates introduced in [[GEOS-Chem v11-01#v11-01e|v11-01e]]:'''
*[[Implementation_of_HEMCO_in_GEOS-Chem#Features_added_in_v11-01e|Update HEMCO from version 1.1.005 to version 1.1.016]]
'''Updates introduced in [[GEOS-Chem v11-01#v11-01f|v11-01f]]:'''
*[[EMEP_European_anthropogenic_emissions#Zero_EMEP_emissions_at_30N|New EMEP mask to prevent zero emissions at 30N]]
*[[Centralized_chemistry_time_step#Optimal_Configuration|Optimal timestep settings]]
*Bug fixes in globchem.dat for:
**[[New_isoprene_scheme#Syntax_error_in_globchem.dat_file_for_MOBA_reaction_rate|MOBA + OH --> MOBAOO]]
**[[New_isoprene_scheme#Bug_in_reaction_ISNOOA_.2B_NO2_in_globchem.dat|ISNOOA + NO2 --> PMN]]
|
*[[GEOS-Chem v11-01]]
 
|-valign="top"
|[[GEOS-Chem_v11-01_benchmark_history#v11-01d-Run1|v11-01d-Run1]]
|GEOS-FP 2013
|<tt>12.011</tt>
|<tt>0.011<br>(0.0916%)</tt>
|'''Updates introduced in [[GEOS-Chem v11-01#v11-01c|v11-01c]]:'''
*[[Sulfate_aerosols#Bug_fix_for_sea_salt_alkalinity_in_sulfate_mod.F|Bug fix for sea salt alkalinity in sulfate_mod.F]]
*[[GEOS-Chem_v11-01#Bug_fixes_for_the_ND21_diagnostic|Bug fixes for the ND21 diagnostic]]
*[[MEGAN_v2.1_plus_Guenther_2012_biogenic_emissions#Bug_fix_for_monoterpenes_in_ND46_diagnostic|Bug fix for monoterpenes in ND46 diagnostic]]
'''Updates introduced in [[GEOS-Chem v11-01#v11-01d|v11-01d]]:'''
*[[MEGAN_v2.1_plus_Guenther_2012_biogenic_emissions#CO2_direct_effect_on_isoprene_emissions|CO2 direct effect on isoprene emissions]]
*[[Organics_Working_Group#Criegee_intermediates|Criegee intermediates]]
*[[GFED4_biomass_burning_emissions#Update_to_GFED_4.1|Update biomass burning emissions to GFED4.1]]
*[[GEOS-Chem_v10-01#Fix_for_reading_hourly_NEI2011_emissions|Fix for reading hourly NEI2011 emissions]]
|
*[[GEOS-Chem v11-01]]
 
|-valign="top"
|[[GEOS-Chem_v11-01_benchmark_history#v11-01b-Run0|v11-01b-Run0]]
|GEOS-FP 2013
|<tt>12.000</tt>
|<tt>0.277<br>(2.30%)</tt>
|'''Updates introduced in [[GEOS-Chem v11-01#v11-01a|v11-01a]]:'''
*[[Air_Quantity_Updates_for_v11-01|Correctly incorporate moisture into air quantities and tracer unit conversions]]
*[[Air_Quantity_Updates_for_v11-01#Convection|Use tracer units [kg/kg total air] in convection and advection and [v/v dry air] where previously [v/v]]]
*[[Air Quantity Updates for v11-01#Water Vapor Saturation Pressure|Update water vapor saturation formula (Nordquist, 1973)]]
*[[Cloud_convection#Fixed_bug_in_DO_MERRA_CONVECTION_affecting_mass_conservation|Fix bug in DO_MERRA_CONVECTION affecting mass conservation]]
*[[GEOS-Chem v11-01#Prevent negative tracer concentrations after advection|Reset negative tracer concentrations within advection to small positive values at poles]]
'''Updates introduced in [[GEOS-Chem v11-01#v11-01b|v11-01b]]:'''
*[[Sulfate_aerosols#Update_DMS_climatology_to_Lana|Update DMS climatology to Lana]]
*[[Wet_deposition#Impaction_scavenging_for_hydrophobic_BC_and_homogeneous_IN_removal|Impaction scavenging for hydrophobic BC]]
*[[Wet_deposition#Impaction_scavenging_for_hydrophobic_BC_and_homogeneous_IN_removal|Homogeneous IN removal]]
*[[Aerosols_Working_Group#Organic_Aerosol_Density_.28v.10-01.29|Density of OA update]]
*[[Mineral_dust_aerosols#Improved_dust_size_distribution_scheme|Improved dust size distribution scheme]]
*[[Mineral_dust_aerosols#Now_treat_DST2-DST4_as_coarse_mode_in_wet_scavenging|Now treat DST2-DST4 as coarse mode in wet scavenging]]
*[[GEOS-Chem_v11-01#Update_of_PMN_.2B_O3_reaction_products_in_globchem.dat_file|Update of PMN + O3 reaction products in globchem.dat file]]
*[[UCX_chemistry_mechanism#Fix_for_black_carbon_in_ucx_mod.F|Bug fix for black carbon in ucx_mod.F]]
|
*[[GEOS-Chem v11-01]]
 
|}
 
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 18:12, 29 March 2018 (UTC)
 
=== Mean OH in GEOS-Chem v10 ===
 
The following table chronicles the evolution of the mean OH value from several different GEOS-Chem simulations.  All benchmark simulations were conducted at [[GEOS-Chem_horizontal_grids#GMAO_4_x_5_grid|4&deg; x 5&deg; resolution]] unless noted otherwise.
 
{| border=1 cellspacing=0 cellpadding=5
|- bgcolor="#CCCCCC"
!width="125px"|Benchmark
!width="100px"|Met Fields & Year
!width="125px"|Mean OH<br>[10<sup>5</sup> molec cm<sup>-3</sup>]
!width="125px"|Change from<br>prev. version<br>[10<sup>5</sup> molec cm<sup>-3</sup>]
!width="500px"|Important updates in this benchmark simulation
!width="175px"|References
 
|-valign="top"
| [[GEOS-Chem_v10-01_benchmark_history#v10-01i-Run0|v10-01i-Run0]]
| GEOS-FP 2013
| <tt>11.125</tt>
| <tt>0.033<br>(0.298%)</tt>
|
*[[HEMCO|HEMCO emissions component]] fixes:
**[[Ship_emissions#Bug_fixes_for_the_PARANOX_HEMCO_extension|Bug fixes for the PARANOX HEMCO extension]]
**[http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/AEIC/v2015-01/README Reprocessed AEIC emissions]
|
*[[GEOS-Chem v10-01|v10-01 page]]
*[[HEMCO]] page
*[[Ship emissions]] page
*[[Aircraft emissions]] page
 
|-valign="top"
| [[GEOS-Chem_v10-01_benchmark_history#v10-01h-Run0|v10-01h-Run0]]
| GEOS-FP 2013
| <tt>11.092</tt>
| <tt>-0.751<br>(-6.341%)</tt>
|
*[[HEMCO|HEMCO emissions component]] updates:
**[[MEGAN v2.1 plus Guenther 2012 biogenic_emissions|Updates to MEGAN2.1 biogenic emissions]]
**[[Ship_emissions#PARANOX_updates_by_Chris_Holmes_and_Geert_Vinken_.28July_2014.29|Updates to ship NOx chemistry]]
**[[EDGAR_v4.2_anthropogenic_emissions|EDGAR v4.2 anthropogenic emissions]]
**[http://mix.greenresource.cn/ MIX Asian anthropogenic emissions]
**[[EPA/NEI11 North American emissions|NEI2011 anthropogenic emissions]]
**[[EMEP_European_anthropogenic_emissions#Reprocess_EMEP_emissions_for_1990-2012|Reprocessed EMEP emissions for 1990-2012]]
**[[Lightning_NOx_emissions#Update_OTD.2FLIS_factors_for_GEOS-FP_through_October_2014|Updated OTD/LIS factors for GEOS-FP]]
**[[GFED4 biomass burning emissions|GFED4 biomass burning emissions]]
|
*[[GEOS-Chem v10-01|v10-01 page]]
*[[HEMCO]] page
*[[MEGAN v2.1 plus Guenther 2012 biogenic_emissions|MEGAN2.1]] page
*[[Ship emissions]] page
*[[EDGAR_v4.2_anthropogenic_emissions|EDGAR v4.2]] page
*[http://mix.greenresource.cn/ MIX] web page
*[[EPA/NEI11 North American emissions|NEI2011]] page
*[[EMEP_European_anthropogenic_emissions|EMEP]] page
*[[Lightning_NOx_emissions|Lightning NOx]] page
*[[GFED4 biomass burning emissions|GFED4]] page
 
|-valign="top"
| [[GEOS-Chem_v10-01_benchmark_history#v10-01e-Run1|v10-01e-Run1]]
| GEOS-FP 2013
| <tt>11.843</tt>
| <tt>-0.042<br>(-0.353%)</tt>
|
*[[HEMCO|HEMCO emissions component]]
|
*[[GEOS-Chem v10-01|v10-01 page]]
*[[HEMCO]] page
 
|-valign="top"
| [[GEOS-Chem_v10-01_benchmark_history#v10-01c-Run1|v10-01c-Run1]]
| GEOS-FP 2013
| <tt>11.885</tt>
| <tt>-0.665<br>(-5.299%)</tt>
|
*[[UCX chemistry mechanism]]
|
*[[GEOS-Chem v10-01|v10-01 page]]
*[[UCX chemistry mechanism|UCX]] page
 
|-valign="top"
| [[GEOS-Chem_v10-01_benchmark_history#v10-01c-Run0|v10-01c-Run0]]
| GEOS-FP 2013
| <tt>12.550</tt>
| <tt>-0.139<br>(-1.095%)</tt>
|
*[[FAST-JX v7.0 photolysis mechanism]]
|
*[[GEOS-Chem v10-01|v10-01 page]]
*[[FAST-JX v7.0 photolysis mechanism|FAST-JX]] page
 
|}
 
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 18:12, 29 March 2018 (UTC)
 
=== Mean OH in GEOS-Chem v9 ===
 
The following table chronicles the evolution of the mean OH value from several different GEOS-Chem simulations.  All benchmark simulations were conducted at [[GEOS-Chem_horizontal_grids#GMAO_4_x_5_grid|4&deg; x 5&deg; resolution]] unless noted otherwise.
 
{| border=1 cellspacing=0 cellpadding=5
|- bgcolor="#CCCCCC"
!width="125px"|Benchmark
!width="100px"|Met Fields & Year
!width="125px"|Mean OH<br>[10<sup>5</sup> molec cm<sup>-3</sup>]
!width="125px"|Change from<br>prev. version<br>[10<sup>5</sup> molec cm<sup>-3</sup>]
!width="500px"|Important updates in this benchmark simulation
!width="175px"|References
 
|-valign="top"
| [[GEOS-Chem_v9-02_benchmark_history#v9-02r-geosfp-Run1|v9-02r-geosfp-Run1]]
| GEOS-FP 2013
| <tt>12.689</tt>
| <tt>0.300 (2.421%)</tt>
|*[[GEOS-FP|Global simulations with GEOS-FP data product from GMAO]]
*Anthropogenic emissions [[Scale_factors_for_anthropogenic_emissions|scaled to 2010]] (latest year available)
*2011 [[Biomass_burning_emissions#GFED3|GFED3 emissions]] (latest year available)
*[[Olson_land_map#Olson_2001_land_map|Olson 2001 land map]]
|
*[[GEOS-Chem v9-02|v9-02 page]]
*[[GEOS-FP]] page
*[[Olson land map]] page
 
|-valign="top"
| [[GEOS-Chem_v9-02_benchmark_history#v9-02r-geosfp-Run0|v9-02r-geosfp-Run0]]
| GEOS-FP 2013
| <tt>12.389</tt>
| <tt>-0.537 (-4.154%)</tt>
|
*[[GEOS-FP|Global simulations with GEOS-FP data product from GMAO]]
* Anthropogenic and biomass burning emissions [[Scale_factors_for_anthropogenic_emissions|scaled to 2005]] (same as [[GEOS-Chem_v9-02_benchmark_history#v9-02r-geos5-Run0|v9-02r-geos5-Run0]])
|
*[[GEOS-Chem v9-02|v9-02 page]]
*[[GEOS-FP]] page
 
|-valign="top"
| [[GEOS-Chem_v9-02_benchmark_history#v9-02r-geos5-Run0|v9-02r-geos5-Run0]]
| GEOS-5.1.0 2005
| <tt>12.926</tt>
| <tt>0.356<br>(2.832%)</tt>
|
*[[Aircraft_emissions#MIT_aviation_emissions_inventory|AEIC aircraft emissions inventory]]
*[[Sulfate_aerosols#Cloud_water_pH_for_sulfate_formation|Cloud water pH for sulfate formation]]
*[[Aerosol_optical_properties#Better_representation_of_OC_growth_with_RH_and_correction_to_sulfate_optics|Update jv_spec.dat and jv_spec_aod.dat with better representation of OC growth with RH and correction to sulfate optics]]
*[[GEOS-Chem_v9-02#Use_reprocessed_data_files_for_CAC_NH3_emissions|Bug fix in CAC NH3 emissions]]
|
*[[GEOS-Chem v9-02|v9-02 page]]
*[[Aircraft_emissions|Aircraft emiss]] page
*[[Sulfate_aerosols|Sulfate aerosols]] page
*[[Aerosol_optical_properties|Aerosol optical properties]] page
 
|-valign="top"
| [[GEOS-Chem_v9-02_benchmark_history#v9-02l-Run0|v9-02l-Run0]]
| GEOS-5.1.0 2005
| <tt>12.570</tt>
| <tt>0.332<br>(2.713%)</tt>
|
*[[EPA/NEI05 North American emissions#Updated NH3 seasonal scaling factors in v9-02|Updated NH3 seasonal scaling factors over the US]]
*[[Anthropogenic_emissions#CAC|Updated Canadian NH3 inventory]]
*[[GEOS-Chem v9-02#Bug fixes in biofuel_mod.F and emfossil.F|Fix diurnal NOx scale factors and fix double counting of biofuels over Mexico, Canada, and Europe]]
*[[Biomass_burning_emissions#Bug_fix_for_3-hourly_GFED3_emissions|Bug fix for 3-hourly GFED3 emissions]]
*[[Scale factors for anthropogenic emissions#Bug fix for anthropogenic scaling factors for years 2006 and later|Bug fix for anthropogenic scaling factors for years 2006 and later]]
*[[Ship_emissions#Bugs_in_ship_emissions_and_non-local_PBL_mixing|Correct additional bugs in ship emissions w/ non-local PBL mixing]]
*[[Ship emissions#Bug in ship CO emissions|Bug fix for ship CO emissions]]'''
|
*[[GEOS-Chem v9-02|v9-02 page]]
*[[Anthropogenic_emissions|Anthro emiss]] page
*[[Ship_emissions|Ship emiss]] page
 
|-valign="top"
| [[GEOS-Chem_v9-02_benchmark_history#v9-02j-Run0|v9-02j-Run0]]
| GEOS-5.1.0 2005
| <tt>12.238</tt>
| <tt>-0.234<br>(-1.876%)</tt>
|
*[[NOx-Ox-HC-aerosol#Removal_of_NOx_and_Ox_partitioning|Removal of NOx and Ox partitioning]]
*[[ChemTelecon20111202|Inhibition of N2O5 uptake by nitrate aerosol]]
*[[NOx-Ox-HC-aerosol#Improved_HO2_uptake|Improved HO2 uptake by aerosol]]
|
*[[GEOS-Chem v9-02|v9-02 page]]
*[[NOx-Ox-HC-aerosol|Fullchem sim]] page
 
|-valign="top"
| [[GEOS-Chem_v9-02_benchmark_history#v9-02g-Run0|v9-02g-Run0]]
| GEOS-5.1.0 2005
| <tt>12.472</tt>
| <tt>0.969<br>(8.424%)</tt>
|
*[[New_isoprene_scheme|Standardize Paulot isoprene scheme]]
*[[New_isoprene_scheme#Update_One_-_RO2.2BHO2_Reaction_Rate|Fix RO2+HO2 rate constant]]
|
*[[GEOS-Chem v9-02|v9-02 page]]
*[[New_isoprene_scheme|Isoprene scheme]] page
 
|-valign="top"
| [[GEOS-Chem_v9-02_benchmark_history#v9-02f-Run0|v9-02f-Run0]]
| GEOS-5.1.0 2005
| <tt>11.503</tt>
| <tt>0.079<br>(0.692%)</tt>
|
*[[Updating_standard_chemistry_with_JPL_10-6|Inorganic chemistry updates]]
*[[Methyl_peroxy_nitrate_chemistry|Methyl peroxy nitrate (MPN) chemistry]]
|
*[[GEOS-Chem v9-02|v9-02 page]]
*[http://jpldataeval.jpl.nasa.gov/pdf/JPL%2010-6%20Final%2015June2011.pdf JPL 10-6 doc]
*[[Methyl_peroxy_nitrate_chemistry|MPN chem]] page
 
|-valign="top"
| [[GEOS-Chem_v9-02_benchmark_history#v9-02b-Run0|v9-02b-Run0]]
| GEOS-5.1.0 2005
| <tt>11.424</tt>
| <tt>0.068<br>(0.599%)</tt>
|
*[[Soil_NOx_emissions#Updated_soil_NOx_emissions_algorithm|New soil NOx emission module]]
|
*[[GEOS-Chem v9-02|v9-02 page]]
*[[Soil_NOx_emissions|Soil NOx]] page
 
|-valign="top"
| [[GEOS-Chem_v9-01-03_benchmark_history#Run1|v9-01-03r-Run1]]
| GEOS-5.1.0 2005
| <tt>11.356</tt>
| <tt>-0.502<br>(-4.233%)</tt>
|
*[[Bromine chemistry mechanism]]
|
*[[GEOS-Chem v9-01-03|v9-01-03 page]]
*[[Bromine chemistry mechanism|Bromine chem]] page
 
|-valign="top"
| [[GEOS-Chem_v9-01-03_benchmark_history#Run0|v9-01-03r-Run0]]
| GEOS-5.1.0 2005
| <tt>11.858</tt>
| <tt>-0.077<br>(-0.645%)</tt>
|
*[[Stratospheric_chemistry#New_implementation_of_linearized_stratospheric_chemistry|New implementation of linearized stratospheric chemistry]]
*[[Implementation_of_RETRO_Anthropogenic_Emissions#RETRO_anthropogenic_ethane_emissions_are_too_low|Bug fix for too-low RETRO C2H6 emissions]]
*[[Ship_emissions#PARANOX_ship_plume_model|PARANOX plume model for ship emissions]]
|
*[[GEOS-Chem v9-01-03|v9-01-03 page]]
*[[Stratospheric chemistry|Strat chem]] page
*[[Ship emissions]] page
*[[Implementation_of_RETRO_Anthropogenic_Emissions|RETRO]] page
 
|-valign="top"
| [[GEOS-Chem_v9-01-03_benchmark_history#Run0_3|v9-01-03e-Run0]]
| GEOS-5.1.0 2005
| <tt>11.935</tt>
| <tt>-0.397<br>(-3.219%)</tt>
|
*[[Wet_deposition#Add_scavenging_by_snow|Improved snow scavenging and washout parameterization]]
|
*[[GEOS-Chem v9-01-03|v9-01-03 page]]
 
|-valign="top"
| [[GEOS-Chem v9-01-02 benchmark history#Run1|v9-01-02-Run1]]
| GEOS-5.1.0 2005
| <tt>12.332</tt>
| <tt>+0.099<br>(+0.809%)</tt>
|
*[[Implementation of RETRO Anthropogenic Emissions|RETRO anthropogenic VOC emissions]]
*[[Biomass burning emissions#GFED3|GFED3 monthly biomass burning emissions]]
|
*[[GEOS-Chem v9-01-02|v9-01-02 page]]
 
|-valign="top"
| [[GEOS-Chem v9-01-02 benchmark history#Run0|v9-01-02-Run0]]
| GEOS-5.1.0 2005
| <tt>12.233</tt>
| <tt>-0.009<br>(-0.074%)</tt>
|
*[[APM aerosol microphysics]]
*[[GEOS-Chem v9-01-02#Previous issues now resolved in v9-01-02|Various fixes to correct several identified issues]]
|
*[[GEOS-Chem v9-01-02|v9-01-02 page]]
 
|-valign="top"
| [[GEOS-Chem v9-01-01#Run1|v9-01-01-Run1]]
| GEOS-5.1.0 2005
| <tt>12.242</tt>
| <tt>+0.377<br>(+3.177%)</tt>
|
*[http://seas.harvard.edu/~ltmurray/LNOx.v9-01-01.Release.Notes.pdf Updated lighting parameterization]
|
*[[GEOS-Chem v9-01-01|v9-01-01 page]]
 
|-valign="top"
| [[GEOS-Chem v9-01-01#Run0|v9-01-01-Run0]]
| GEOS-5.1.0 2005
| <tt>11.865</tt>
| <tt>+0.798<br>(+7.2%)</tt>
|
*[[Ship_emissions#ICOADS|ICOADS ship emissions]]
*[[GEOS-Chem_v9-01-01#Important_bug_fixes_for_ship_emissions|Bug fixes for ship emissions]]
*[[EPA/NEI05_North_American_emissions#Biofuel_emissions|Bug fixes for EPA/NEI05 biofuels]]
*[http://acmg.seas.harvard.edu/geos/wiki_docs/deposition/v9-01-01_wetdep.pdf Updates for wet scavenging algorithm]
*[[GEOS-Chem_v9-01-01#Post-release_patches|Several post-release patches to correct various issues]]
|
*[[GEOS-Chem v9-01-01|v9-01-01 page]]
*[[Wet deposition]] page
*[[Ship emissions]] page
 
|}
 
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 18:12, 29 March 2018 (UTC)
 
=== Mean OH in GEOS-Chem v8 ===
The following table chronicles the evolution of the mean OH value from several different GEOS-Chem simulations.  All benchmark simulations were conducted at [[GEOS-Chem_horizontal_grids#GMAO_4_x_5_grid| 4&deg; x 5&deg; resolution]] unless noted otherwise.
 
{| border=1 cellspacing=0 cellpadding=5
|- bgcolor="#CCCCCC"
!width="125px"|Benchmark
!width="80px"|Met Fields & Year
!width="125px"|Mean OH<br>[10<sup>5</sup> molec cm<sup>-3</sup>]
!width="125px"|Change from<br>prev. version<br>[10<sup>5</sup> molec cm<sup>-3</sup>]
!width="500px"|Important updates in this benchmark simulation
!width="175px"|References
 
|-valign="top"
| [[GEOS-Chem v8-02-04#Run2|v8-02-04-Run2]]
| GEOS-5.1.0 2005
| <tt>11.067</tt>
| <tt>+0.019<br>(+0.17%)</tt>
|
*Linoz stratospheric ozone chemistry used instead of SYNOZ scheme
|
*[[Linoz stratospheric ozone chemistry|Linoz wiki page]]
*[[Talk:GEOS-Chem_v8-02-04|Talk:v8-02-04 page]]
 
|-valign="top"
| [[GEOS-Chem v8-02-04#Run1|v8-02-04-Run1]]
| GEOS-5.1.0 2005
| <tt>11.048</tt>
| <tt>+0.598<br>(+5.72%)</tt>
|
*MEGAN hybrid model with MODIS-derived LAI
|
*[[MEGAN biogenic emissions|MEGAN wiki page]]
*[[Talk:GEOS-Chem_v8-02-04|Talk:v8-02-04 page]]
 
|-valign="top"
| [[GEOS-Chem v8-02-04#Run0|v8-02-04-Run0]]
| GEOS-5.1.0 2005
| <tt>10.450</tt>
| <tt>-1.362<br>(-11.53%)</tt>
|
*MEGAN hybrid model with AVHRR-derived LAI
*EPA/NEI2005 emissions
*Non-local PBL mixing scheme
|
*[[MEGAN biogenic emissions|MEGAN wiki page]]
*[[EPA/NEI05 North American emissions|NEI2005 wiki page]]
*[[Talk:GEOS-Chem_v8-02-04|Talk:v8-02-04 page]]
*[http://acmg.seas.harvard.edu/publications/jlin5_2009_AE_1.pdf Lin et al 2009]
 
|-valign="top"
| [[GEOS-Chem v8-02-01#Run0|v8-02-01-Run0]]
| GEOS-5.1.0 2005
| <tt>11.812</tt>
| <tt>+0.713<br>(+6.42%)</tt>
|
*Updated chemical mechanism: <tt>globchem.dat</tt>
*Updated photolysis rxn rates: <tt>jv_spec.dat, ratj.d</tt>
 
:NOTE: there was [[Chemistry Issues#near-IR photolysis of HNO4|a bug in near IR photolysis of HNO4 and HCHO]] in the <tt>jv_spec.dat</tt> and <tt>ratj.d</tt> files.  This was finally resolved in v8-02-04.  We recommend all users of v8-02-01, v8-02-02, and v8-02-03 to use these updated [http://acmg.seas.harvard.edu/geos/wiki_docs/chemistry/jv_spec.dat <tt>jv_spec.dat</tt>] and [http://acmg.seas.harvard.edu/geos/wiki_docs/chemistry/ratj.d <tt>ratj.d</tt>] files.
|
*[http://acmg.seas.harvard.edu/geos/wiki_docs/chemistry/chemistry_updates_v5.pdf Chemistry mechanism document]
*[[Photolysis mechanism|FAST-J wiki page]]
 
|-valign="top"
| [[GEOS-Chem v8-01-04#Run2|v8-01-04-Run2]]
| GEOS-5.1.0 2005
| <tt>11.099</tt>
| <tt>+0.805<br>(+7.82%)</tt>
|
*Updated to the newer GEOS-5.1.0 met data product
*Switched to [http://acmg.seas.harvard.edu/geos/wiki_docs/geos5/GEOS-5_cloud_regridding_equations.pdf Hongyu Liu's regridding algorithm for optical depth]
|
*[[GEOS-5 met field reprocessing|GEOS-5 met field reprocessing wiki page]]
*[[GEOS-5 issues|GEOS-5 issues wiki page]]
 
|-valign="top"
| [[GEOS-Chem v8-01-04#Run1|v8-01-04-Run1]]
| GEOS-5.0.1 2005
| <tt>10.294</tt>
| <tt>-0.395<br>(-3.69%)</tt>
|
*Various emissions updates with regional overwrites
*Aaron van Donkelaar et al scale factors for 2005
*Switched from linear to random cloud overlap in FAST-J
|
*[http://wiki.seas.harvard.edu/geos-chem/images/Anth_emiss_gc_v8-01-04.pdf Anthropogenic emissions in v8-01-04]
*[[Photolysis mechanism|FAST-J wiki page]]
 
|-valign="top"
| [[GEOS-Chem v8-01-04#Run0|v8-01-04-Run0]]
| GEOS-5.0.1 2005
| <tt>10.689</tt>
| <tt>-1.351<br>(-11.22%)</tt>
|
*[[Biogenic_emissions#Updated_annual_emission_factor_for_Isoprene|New MEGAN annual emission factors for isoprene]]
*New TPCORE
*[[GEOS-5_issues#Quick_fix_for_optical_depth|Quick fix for optical depths]]
|
*[[Biogenic_emissions|Biogenic emissions wiki page]]
*[[GEOS-5_issues|GEOS-5 issues wiki page]]
 
|-valign="top"
| [[GEOS-Chem v8-01-01#Run1|v8-01-01-Run1]]
| GEOS-5.0.1 2005
| <tt>12.040</tt>
| <tt>+0.034<br>(+0.28%)</tt>
|
*Switched aerosol thermodynamical equilibrium scheme from ISORROPIA I to RPMARES
|
* [[Aerosol thermodynamical equilibrium|ATE wiki page]]
 
|-valign="top"
| [[GEOS-Chem v8-01-01#Run0|v8-01-01-Run0]]
| GEOS-5.0.1 2005
| <tt>12.006</tt>
| <tt>-0.141<br>(-1.16%)</tt>
|
*First simulation with GEOS-5 met data
|
*[[GEOS-5_issues|GEOS-5 issues wiki page]]
 
|}
 
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 18:11, 29 March 2018 (UTC)
 
==== Additional information for GEOS-Chem v8 ====
 
* [http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/Isoprene_v8-02-04_Run0_vs_Run1.pdf Differences in isoprene between v8-02-04-Run1 and v8-02-04-Run0]
* [http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/MODIS_LAI_vs_AVHRR_LAI.pdf Differences between MODIS LAI and AVHRR LAI]
 
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 19:12, 29 March 2018 (UTC)
 
=== Mean OH in GEOS-Chem v7 ===
 
The following table chronicles the evolution of the mean OH value from several different GEOS-Chem simulations.  All benchmark simulations were conducted at [[GEOS-Chem_horizontal_grids#GMAO_4_x_5_grid|4&deg; x 5&deg; resolution]] unless noted otherwise.
 
{| border=1 cellspacing=0 cellpadding=5
|- bgcolor="#CCCCCC"
!width="125px"|Benchmark
!width="80px"|Met Fields & Year
!width="125px"|Mean OH<br>[10<sup>5</sup> molec cm<sup>-3</sup>]
!width="125px"|Change from<br>prev. version<br>[10<sup>5</sup> molec cm<sup>-3</sup>]
!width="500px"|Important updates in this benchmark simulation
!width="175px"|References
 
|-valign="top"
| [[GEOS-Chem_v7-04-13#Run|v7-04-13-Run]]
| GEOS-4 2005
| <tt>12.147</tt>
| <tt>-0.669<br>(-5.22%)</tt>
|
*[[Lightning_NOx_emissions#Updated_OTD.2FLIS_local_redistribution_for_GEOS-5|Updated non-near-land OTD/LIS local scaling for lightning]]
|
*[[Lightning NOx emissions|Lightning wiki page]]
 
|-valign="top"
| [[GEOS-Chem_v7-04-12#Run2|v7-04-12-Run2]]
| GEOS-4 2005
| <tt>12.816</tt>
| <tt>+1.053<br>(+8.95%)</tt>
|
*Original non-near-land OTD/LIS local scaling
|
*[[Lightning NOx emissions|Lightning wiki page]]
*[http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/Changes_in_CO_O3_in_1yr_benchmarks.pdf Hudman PDF]
*[http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/differences_v7-04-12.pdf v7-04-12 diff list]
 
|-valign="top"
| [[GEOS-Chem_v7-04-12#Run1|v7-04-12-Run1]]
| GEOS-4 2005
| <tt>11.763</tt>
| <tt>-0.68<br>(-5.5%)</tt>
|
*Ancient lightning scheme
|
*[[Lightning NOx emissions|Lightning wiki page]]
*[http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/Changes_in_CO_O3_in_1yr_benchmarks.pdf Hudman PDF]
*[http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/differences_v7-04-12.pdf v7-04-12 diff list]
 
|-valign="top"
| v7-04-02-MEGAN
| GEOS-4 2001
| <tt>12.44</tt>
| <tt>-0.11<br>(-0.87%)</tt>
|
* First benchmark w/ MEGAN biogenic emissions
|
*[[MEGAN biogenic emissions|MEGAN wiki page]]
*[http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/Changes_in_CO_O3_in_1yr_benchmarks.pdf Hudman PDF]
*[http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/differences_v7-04-02.pdf v7-04-02 diff list]
 
|-valign="top"
| v7-04-02-NOMEGAN
| GEOS-4 2001
| <tt>12.55</tt>
| <tt>+0.01<br>(+0.08%)</tt>
|
* Switched fossil fuel scale year from 1995 to 1998
* Last benchmark w/ the older GEIA biogenic emissions
|
*[[Biogenic emissions#GEIA|GEIA wiki page]]
*[http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/Changes_in_CO_O3_in_1yr_benchmarks.pdf Hudman PDF]
*[http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/differences_v7-04-02.pdf v7-04-02 diff list]
 
|-valign="top"
| v7-04-02-Base
| GEOS-4 2001
| <tt>12.54</tt>
| <tt>+0.67<br>(+5.6%)</tt>
|
* 43 tracer simulation (no secondary organic aerosols)
* Last 1-yr benchmark with fossil fuel scale year = 1995
|
*[http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/Changes_in_CO_O3_in_1yr_benchmarks.pdf Hudman PDF]
*[http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/differences_v7-04-02.pdf v7-04-02 diff list]
 
|-valign="top"
| v7-02-03-Run1
| GEOS-4 2001
| <tt>11.87</tt>
| <tt>+1.39<br>(+13.26%)</tt>
|
*Secondary organic aerosols (50 tracers)
*GEOS-4 met fields
|
*[[Secondary_organic_aerosols|SOA wiki page]]
*[http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/Changes_in_CO_O3_in_1yr_benchmarks.pdf Hudman PDF]
 
|-valign="top"
| v7-02-03-Run0
| GEOS-3 2001
| <tt>10.48</tt>
| ---
|
*Secondary organic aerosols (50 tracers)
*GEOS-3 2001
|
*[[Secondary_organic_aerosols|SOA wiki page]]
*[http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/Changes_in_CO_O3_in_1yr_benchmarks.pdf Hudman PDF]
 
|}
 
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 18:11, 29 March 2018 (UTC)
 
==== Additional information for GEOS-Chem v7 ====


* Rynda Hudman investigated the [http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/Changes_in_CO_O3_in_1yr_benchmarks.pdf changes in CO and O3 among benchmark simulations from v7-02-03 thru v7-04-12].
[[Image:GC_Mean_OH_12.8.0.png|1000px]]
* [http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/differences_v7-04-02.pdf List of differences in benchmark simulations between v7-02-03 and v7-04-02].
* [http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/differences_v7-04-02.pdf List of differences in benchmark simulations between v7-04-02 and v7-04-12].
* [http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/anthro_comparison.mar2001.pdf Changes in anthropogenic NOx and CO from 1-yr benchmarks with versions v7-02-03 and v7-02-04]
* Jennifer Logan looked at some of the [http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/geos4.vs.geos3.problems.pdf differences between GEOS-3 and GEOS-4 in 1-year benchmark simulations].


--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 19:13, 29 March 2018 (UTC)
--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 02:17, 13 August 2023 (UTC)

Latest revision as of 14:54, 18 October 2023

On this page we track the evolution of the mean OH concentration in GEOS-Chem. This value is an indicator of how "hot" the chemistry is. Please also see the related topic about the methyl chloroform lifetime in GEOS-Chem.

Evolution of mean OH in GEOS-Chem

Plot of mean OH evolution

Here is a plot of the mean OH concentration from GEOS-Chem 1-year benchmark simulations. The mean OH is an indicator how the chemistry mechanism is performing. Typical values are 10–12 x 105 molecules cm-1.

GC Mean OH 12.8.0.png

--Melissa Sulprizio (talk) 02:17, 13 August 2023 (UTC)

Retrieved from "https://wiki.seas.harvard.edu/geos-chem/index.php?title=Mean_OH_concentration&oldid=52794"