Difference between revisions of "Mean OH concentration"
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!width="500px"|Important updates in this benchmark simulation | !width="500px"|Important updates in this benchmark simulation | ||
!width="175px"|References | !width="175px"|References | ||
+ | |||
+ | |-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" | |-valign="top" | ||
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|GEOS-FP 2016 | |GEOS-FP 2016 | ||
|<tt>11.648</tt> | |<tt>11.648</tt> | ||
− | |<tt>+0.116<br>(+0. | + | |<tt>+0.116<br>(+0.101%)</tt> |
− | |'''Updates introduced in | + | |'''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]] | *[[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]] | *[[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]] |
Revision as of 16:52, 21 May 2020
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.
Computation of the mean OH diagnostic
Routine DO_DIAG_OH (in module GeosCore/diag_oh_mod.F) 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 PRINT_MEAN_OH (in module GeosCore/diag_oh_mod.F):
! 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 105 or 115 molec/cm3.
--Bob Yantosca (talk) 19:43, 29 March 2018 (UTC)
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 through 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 105 molecules cm-1.
--Bob Yantosca (talk) 15:49, 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 4° x 5° resolution unless noted otherwise.
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 4° x 5° resolution unless noted otherwise.
--Bob Yantosca (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 4° x 5° resolution unless noted otherwise.
Benchmark | Met Fields & Year | Mean OH [105 molec cm-3] |
Change from prev. version [105 molec cm-3] |
Important updates in this benchmark simulation | References |
---|---|---|---|---|---|
v10-01i-Run0 | GEOS-FP 2013 | 11.125 | 0.033 (0.298%) |
| |
v10-01h-Run0 | GEOS-FP 2013 | 11.092 | -0.751 (-6.341%) |
|
|
v10-01e-Run1 | GEOS-FP 2013 | 11.843 | -0.042 (-0.353%) |
| |
v10-01c-Run1 | GEOS-FP 2013 | 11.885 | -0.665 (-5.299%) |
| |
v10-01c-Run0 | GEOS-FP 2013 | 12.550 | -0.139 (-1.095%) |
|
--Bob Yantosca (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 4° x 5° resolution unless noted otherwise.
--Bob Yantosca (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 4° x 5° resolution unless noted otherwise.
Benchmark | Met Fields & Year | Mean OH [105 molec cm-3] |
Change from prev. version [105 molec cm-3] |
Important updates in this benchmark simulation | References |
---|---|---|---|---|---|
v8-02-04-Run2 | GEOS-5.1.0 2005 | 11.067 | +0.019 (+0.17%) |
|
|
v8-02-04-Run1 | GEOS-5.1.0 2005 | 11.048 | +0.598 (+5.72%) |
|
|
v8-02-04-Run0 | GEOS-5.1.0 2005 | 10.450 | -1.362 (-11.53%) |
|
|
v8-02-01-Run0 | GEOS-5.1.0 2005 | 11.812 | +0.713 (+6.42%) |
|
|
v8-01-04-Run2 | GEOS-5.1.0 2005 | 11.099 | +0.805 (+7.82%) |
|
|
v8-01-04-Run1 | GEOS-5.0.1 2005 | 10.294 | -0.395 (-3.69%) |
|
|
v8-01-04-Run0 | GEOS-5.0.1 2005 | 10.689 | -1.351 (-11.22%) |
||
v8-01-01-Run1 | GEOS-5.0.1 2005 | 12.040 | +0.034 (+0.28%) |
|
|
v8-01-01-Run0 | GEOS-5.0.1 2005 | 12.006 | -0.141 (-1.16%) |
|
--Bob Yantosca (talk) 18:11, 29 March 2018 (UTC)
Additional information for GEOS-Chem v8
- Differences in isoprene between v8-02-04-Run1 and v8-02-04-Run0
- Differences between MODIS LAI and AVHRR LAI
--Bob Yantosca (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 4° x 5° resolution unless noted otherwise.
Benchmark | Met Fields & Year | Mean OH [105 molec cm-3] |
Change from prev. version [105 molec cm-3] |
Important updates in this benchmark simulation | References |
---|---|---|---|---|---|
v7-04-13-Run | GEOS-4 2005 | 12.147 | -0.669 (-5.22%) |
||
v7-04-12-Run2 | GEOS-4 2005 | 12.816 | +1.053 (+8.95%) |
|
|
v7-04-12-Run1 | GEOS-4 2005 | 11.763 | -0.68 (-5.5%) |
|
|
v7-04-02-MEGAN | GEOS-4 2001 | 12.44 | -0.11 (-0.87%) |
|
|
v7-04-02-NOMEGAN | GEOS-4 2001 | 12.55 | +0.01 (+0.08%) |
|
|
v7-04-02-Base | GEOS-4 2001 | 12.54 | +0.67 (+5.6%) |
|
|
v7-02-03-Run1 | GEOS-4 2001 | 11.87 | +1.39 (+13.26%) |
|
|
v7-02-03-Run0 | GEOS-3 2001 | 10.48 | --- |
|
--Bob Yantosca (talk) 18:11, 29 March 2018 (UTC)
Additional information for GEOS-Chem v7
- Rynda Hudman investigated the changes in CO and O3 among benchmark simulations from v7-02-03 thru v7-04-12.
- List of differences in benchmark simulations between v7-02-03 and v7-04-02.
- List of differences in benchmark simulations between v7-04-02 and v7-04-12.
- 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 differences between GEOS-3 and GEOS-4 in 1-year benchmark simulations.
--Bob Yantosca (talk) 19:13, 29 March 2018 (UTC)