Difference between revisions of "Mean OH concentration"
(→Table of mean OH values) |
(→Table of mean OH values) |
||
Line 71: | Line 71: | ||
|-bgcolor="CCFFFF" | |-bgcolor="CCFFFF" | ||
!colspan="6"|GEOS-Chem version 11 | !colspan="6"|GEOS-Chem version 11 | ||
+ | |||
+ | |-align="center" valign="top" | ||
+ | |[[GEOS-Chem_v11-01_benchmark_history#v11-01b-Run0|v11-01b-Run0]] | ||
+ | |GEOS-FP 2013 | ||
+ | |<tt>12.000</tt> | ||
+ | |<tt>0.277 (2.30%)</tt> | ||
+ | |<div align="left"> | ||
+ | '''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]] | ||
+ | </div> | ||
+ | |<div align="left"> | ||
+ | *[[GEOS-Chem v11-01]] | ||
+ | </div> | ||
|-bgcolor="CCFFFF" | |-bgcolor="CCFFFF" | ||
Line 80: | Line 106: | ||
| <tt>11.125</tt> | | <tt>11.125</tt> | ||
| <tt>0.033 (0.298%)</tt> | | <tt>0.033 (0.298%)</tt> | ||
− | |<div align="left"> | + | | |
+ | <div align="left"> | ||
*[[HEMCO|HEMCO emissions component]] fixes: | *[[HEMCO|HEMCO emissions component]] fixes: | ||
**[[Ship_emissions#Bug_fixes_for_the_PARANOX_HEMCO_extension|Bug fixes for the PARANOX HEMCO extension]] | **[[Ship_emissions#Bug_fixes_for_the_PARANOX_HEMCO_extension|Bug fixes for the PARANOX HEMCO extension]] |
Revision as of 15:14, 29 March 2018
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.
Contents
Computation of the mean OH diagnostic
The mean OH diagnostic in GEOS-Chem is computed in diag_pl_mod.f.
Routine DO_DIAG_OH 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:
! Sum air mass term into AIR_MASS array XAIRMASS = AIRDENS(JLOOP) * VOLUME(JLOOP) AIR_MASS(I,J,L) = AIR_MASS(I,J,L) + XAIRMASS ! Sum OH mass term into OH_MASS array XOHMASS = CSPEC(JLOOP,IDOH) * XAIRMASS OH_MASS(I,J,L) = OH_MASS(I,J,L) + XOHMASS
where the arrays contain the following quantities:
JLOOP = 1-D array index for SMVGEAR I,J,L = 3-D array indices AIRDENS(JLOOP) = air density [molec/cm3] VOLUME(JLOOP) = grid box volume [cm3] AIR_MASS(I,J,L) = air mass [molec air] CSPEC(JLOOP,IDOH) = 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:
! 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 vary between 105 - 115 molec/cm3.
--Bob Y. 15:12, 11 February 2010 (EST)
Evolution of mean OH in GEOS-Chem
Plot of mean OH evolution
Here is a plot of the mean OH concentration from several recent 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.
--Bob Y. 12:41, 17 January 2014 (EST)
Table of mean OH values
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 previous version [105 molec cm-3] |
Important updates in this benchmark simulation | References |
---|---|---|---|---|---|
GEOS-Chem version 11 | |||||
v11-01b-Run0 | GEOS-FP 2013 | 12.000 | 0.277 (2.30%) | Updates introduced in v11-01a:
Updates introduced in v11-01b:
|
|
GEOS-Chem version 10 | |||||
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%) |
| |
GEOS-Chem version 9 | |||||
v9-02r-geosfp-Run1 | GEOS-FP 2013 | 12.689 | 0.300 (2.421%) |
|
|
v9-02r-geosfp-Run0 | GEOS-FP 2013 | 12.389 | -0.537 (-4.154%) |
|
|
v9-02r-geos5-Run0 | GEOS-5.1.0 2005 | 12.926 | 0.356 (2.832%) |
| |
v9-02l-Run0 | GEOS-5.1.0 2005 | 12.570 | 0.332 (2.713%) |
|
|
v9-02j-Run0 | GEOS-5.1.0 2005 | 12.238 | -0.234 (-1.876%) |
| |
v9-02g-Run0 | GEOS-5.1.0 2005 | 12.472 | 0.969 (8.424%) |
||
v9-02f-Run0 | GEOS-5.1.0 2005 | 11.503 | 0.079 (0.692%) |
||
v9-02b-Run0 | GEOS-5.1.0 2005 | 11.424 | 0.068 (0.599%) |
| |
v9-01-03r-Run1 | GEOS-5.1.0 2005 | 11.356 | -0.502 (-4.233%) |
||
v9-01-03r-Run0 | GEOS-5.1.0 2005 | 11.858 | -0.077 (-0.645%) |
| |
v9-01-03e-Run0 | GEOS-5.1.0 2005 | 11.935 | -0.397 (-3.219%) |
||
v9-01-02-Run1 | GEOS-5.1.0 2005 | 12.332 | +0.099 (+0.809%) |
||
v9-01-02-Run0 | GEOS-5.1.0 2005 | 12.233 | -0.009 (-0.074%) |
||
v9-01-01-Run1 | GEOS-5.1.0 2005 | 12.242 | +0.377 (+3.177%) |
||
v9-01-01-Run0 | GEOS-5.1.0 2005 | 11.865 | +0.798 (+7.2%) |
| |
GEOS-Chem version 8 | |||||
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%) |
|
|
GEOS-Chem version 7 | |||||
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 Y. 12:13, 3 October 2013 (EDT)
--Melissa Sulprizio (talk) 21:23, 28 May 2015 (UTC)
Additional documentation
GEOS-Chem version 8
- Differences in isoprene between v8-02-04-Run1 and v8-02-04-Run0
- Differences between MODIS LAI and AVHRR LAI
GEOS-Chem version 7
- 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 Y. 09:32, 23 February 2010 (EST)