Difference between revisions of "Mean OH concentration"
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=== Mean OH in GEOS-Chem v8 === | === 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 [http://acmg.seas.harvard.edu/geos/doc/man/appendix_2.html#GMAO_4x5 4 x 5 resolution] unless noted otherwise. | ||
{| border=1 cellspacing=0 cellpadding=5 | {| border=1 cellspacing=0 cellpadding=5 | ||
|- bgcolor="#CCCCCC" | |- bgcolor="#CCCCCC" | ||
− | !Benchmark | + | !width="125px"|Benchmark |
− | !Met Fields & Year | + | !width="80px"|Met Fields & Year |
− | !Mean OH<br>[10<sup>5</sup> molec cm<sup>-3</sup>] | + | !width="125px"|Mean OH<br>[10<sup>5</sup> molec cm<sup>-3</sup>] |
− | !Change from<br> | + | !width="125px"|Change from<br>prev. version<br>[10<sup>5</sup> molec cm<sup>-3</sup>] |
− | !Important updates in this benchmark simulation | + | !width="500px"|Important updates in this benchmark simulation |
− | !References | + | !width="175px"|References |
− | |- | + | |-valign="top" |
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| [[GEOS-Chem v8-02-04#Run2|v8-02-04-Run2]] | | [[GEOS-Chem v8-02-04#Run2|v8-02-04-Run2]] | ||
| GEOS-5.1.0 2005 | | GEOS-5.1.0 2005 | ||
| <tt>11.067</tt> | | <tt>11.067</tt> | ||
| <tt>+0.019<br>(+0.17%)</tt> | | <tt>+0.019<br>(+0.17%)</tt> | ||
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*Linoz stratospheric ozone chemistry used instead of SYNOZ scheme | *Linoz stratospheric ozone chemistry used instead of SYNOZ scheme | ||
− | + | | | |
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*[[Linoz stratospheric ozone chemistry|Linoz wiki page]] | *[[Linoz stratospheric ozone chemistry|Linoz wiki page]] | ||
*[[Talk:GEOS-Chem_v8-02-04|Talk:v8-02-04 page]] | *[[Talk:GEOS-Chem_v8-02-04|Talk:v8-02-04 page]] | ||
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− | |- | + | |-valign="top" |
| [[GEOS-Chem v8-02-04#Run1|v8-02-04-Run1]] | | [[GEOS-Chem v8-02-04#Run1|v8-02-04-Run1]] | ||
| GEOS-5.1.0 2005 | | GEOS-5.1.0 2005 | ||
| <tt>11.048</tt> | | <tt>11.048</tt> | ||
| <tt>+0.598<br>(+5.72%)</tt> | | <tt>+0.598<br>(+5.72%)</tt> | ||
− | | | + | | |
*MEGAN hybrid model with MODIS-derived LAI | *MEGAN hybrid model with MODIS-derived LAI | ||
− | + | | | |
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*[[MEGAN biogenic emissions|MEGAN wiki page]] | *[[MEGAN biogenic emissions|MEGAN wiki page]] | ||
*[[Talk:GEOS-Chem_v8-02-04|Talk:v8-02-04 page]] | *[[Talk:GEOS-Chem_v8-02-04|Talk:v8-02-04 page]] | ||
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| [[GEOS-Chem v8-02-04#Run0|v8-02-04-Run0]] | | [[GEOS-Chem v8-02-04#Run0|v8-02-04-Run0]] | ||
| GEOS-5.1.0 2005 | | GEOS-5.1.0 2005 | ||
| <tt>10.450</tt> | | <tt>10.450</tt> | ||
| <tt>-1.362<br>(-11.53%)</tt> | | <tt>-1.362<br>(-11.53%)</tt> | ||
− | | | + | | |
*MEGAN hybrid model with AVHRR-derived LAI | *MEGAN hybrid model with AVHRR-derived LAI | ||
*EPA/NEI2005 emissions | *EPA/NEI2005 emissions | ||
*Non-local PBL mixing scheme | *Non-local PBL mixing scheme | ||
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*[[MEGAN biogenic emissions|MEGAN wiki page]] | *[[MEGAN biogenic emissions|MEGAN wiki page]] | ||
*[[EPA/NEI05 North American emissions|NEI2005 wiki page]] | *[[EPA/NEI05 North American emissions|NEI2005 wiki page]] | ||
*[[Talk:GEOS-Chem_v8-02-04|Talk:v8-02-04 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] | *[http://acmg.seas.harvard.edu/publications/jlin5_2009_AE_1.pdf Lin et al 2009] | ||
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| [[GEOS-Chem v8-02-01#Run0|v8-02-01-Run0]] | | [[GEOS-Chem v8-02-01#Run0|v8-02-01-Run0]] | ||
| GEOS-5.1.0 2005 | | GEOS-5.1.0 2005 | ||
| <tt>11.812</tt> | | <tt>11.812</tt> | ||
| <tt>+0.713<br>(+6.42%)</tt> | | <tt>+0.713<br>(+6.42%)</tt> | ||
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*Updated chemical mechanism: <tt>globchem.dat</tt> | *Updated chemical mechanism: <tt>globchem.dat</tt> | ||
*Updated photolysis rxn rates: <tt>jv_spec.dat, ratj.d</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. | :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. | ||
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*[http://acmg.seas.harvard.edu/geos/wiki_docs/chemistry/chemistry_updates_v5.pdf Chemistry mechanism document] | *[http://acmg.seas.harvard.edu/geos/wiki_docs/chemistry/chemistry_updates_v5.pdf Chemistry mechanism document] | ||
*[[Photolysis mechanism|FAST-J wiki page]] | *[[Photolysis mechanism|FAST-J wiki page]] | ||
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| [[GEOS-Chem v8-01-04#Run2|v8-01-04-Run2]] | | [[GEOS-Chem v8-01-04#Run2|v8-01-04-Run2]] | ||
| GEOS-5.1.0 2005 | | GEOS-5.1.0 2005 | ||
| <tt>11.099</tt> | | <tt>11.099</tt> | ||
| <tt>+0.805<br>(+7.82%)</tt> | | <tt>+0.805<br>(+7.82%)</tt> | ||
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*Updated to the newer GEOS-5.1.0 met data product | *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] | *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] | ||
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*[[GEOS-5 met field reprocessing|GEOS-5 met field reprocessing wiki page]] | *[[GEOS-5 met field reprocessing|GEOS-5 met field reprocessing wiki page]] | ||
*[[GEOS-5 issues|GEOS-5 issues wiki page]] | *[[GEOS-5 issues|GEOS-5 issues wiki page]] | ||
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| [[GEOS-Chem v8-01-04#Run1|v8-01-04-Run1]] | | [[GEOS-Chem v8-01-04#Run1|v8-01-04-Run1]] | ||
| GEOS-5.0.1 2005 | | GEOS-5.0.1 2005 | ||
| <tt>10.294</tt> | | <tt>10.294</tt> | ||
| <tt>-0.395<br>(-3.69%)</tt> | | <tt>-0.395<br>(-3.69%)</tt> | ||
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*Various emissions updates with regional overwrites | *Various emissions updates with regional overwrites | ||
*Aaron van Donkelaar et al scale factors for 2005 | *Aaron van Donkelaar et al scale factors for 2005 | ||
*Switched from linear to random cloud overlap in FAST-J | *Switched from linear to random cloud overlap in FAST-J | ||
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*[http://wiki.seas.harvard.edu/geos-chem/images/Anth_emiss_gc_v8-01-04.pdf Anthropogenic emissions in v8-01-04] | *[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]] | *[[Photolysis mechanism|FAST-J wiki page]] | ||
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| [[GEOS-Chem v8-01-04#Run0|v8-01-04-Run0]] | | [[GEOS-Chem v8-01-04#Run0|v8-01-04-Run0]] | ||
| GEOS-5.0.1 2005 | | GEOS-5.0.1 2005 | ||
| <tt>10.689</tt> | | <tt>10.689</tt> | ||
| <tt>-1.351<br>(-11.22%)</tt> | | <tt>-1.351<br>(-11.22%)</tt> | ||
− | | | + | | |
*[[Biogenic_emissions#Updated_annual_emission_factor_for_Isoprene|New MEGAN annual emission factors for isoprene]] | *[[Biogenic_emissions#Updated_annual_emission_factor_for_Isoprene|New MEGAN annual emission factors for isoprene]] | ||
*New TPCORE | *New TPCORE | ||
*[[GEOS-5_issues#Quick_fix_for_optical_depth|Quick fix for optical depths]] | *[[GEOS-5_issues#Quick_fix_for_optical_depth|Quick fix for optical depths]] | ||
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*[[Biogenic_emissions|Biogenic emissions wiki page]] | *[[Biogenic_emissions|Biogenic emissions wiki page]] | ||
*[[GEOS-5_issues|GEOS-5 issues wiki page]] | *[[GEOS-5_issues|GEOS-5 issues wiki page]] | ||
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− | |- | + | |-valign="top" |
| [[GEOS-Chem v8-01-01#Run1|v8-01-01-Run1]] | | [[GEOS-Chem v8-01-01#Run1|v8-01-01-Run1]] | ||
| GEOS-5.0.1 2005 | | GEOS-5.0.1 2005 | ||
| <tt>12.040</tt> | | <tt>12.040</tt> | ||
| <tt>+0.034<br>(+0.28%)</tt> | | <tt>+0.034<br>(+0.28%)</tt> | ||
− | | | + | | |
*Switched aerosol thermodynamical equilibrium scheme from ISORROPIA I to RPMARES | *Switched aerosol thermodynamical equilibrium scheme from ISORROPIA I to RPMARES | ||
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* [[Aerosol thermodynamical equilibrium|ATE wiki page]] | * [[Aerosol thermodynamical equilibrium|ATE wiki page]] | ||
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| [[GEOS-Chem v8-01-01#Run0|v8-01-01-Run0]] | | [[GEOS-Chem v8-01-01#Run0|v8-01-01-Run0]] | ||
| GEOS-5.0.1 2005 | | GEOS-5.0.1 2005 | ||
| <tt>12.006</tt> | | <tt>12.006</tt> | ||
| <tt>-0.141<br>(-1.16%)</tt> | | <tt>-0.141<br>(-1.16%)</tt> | ||
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*First simulation with GEOS-5 met data | *First simulation with GEOS-5 met data | ||
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*[[GEOS-5_issues|GEOS-5 issues wiki page]] | *[[GEOS-5_issues|GEOS-5 issues wiki page]] | ||
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+ | |} | ||
=== Mean OH in GEOS-Chem v7 === | === Mean OH in GEOS-Chem v7 === |
Revision as of 18:08, 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.
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)
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.
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%) |
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v10-01c-Run1 | GEOS-FP 2013 | 11.885 | -0.665 (-5.299%) |
| |
v10-01c-Run0 | GEOS-FP 2013 | 12.550 | -0.139 (-1.095%) |
|
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.
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%) |
|
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v8-01-04-Run2 | GEOS-5.1.0 2005 | 11.099 | +0.805 (+7.82%) |
|
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v8-01-04-Run1 | GEOS-5.0.1 2005 | 10.294 | -0.395 (-3.69%) |
|
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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%) |
|
Mean OH in GEOS-Chem v7
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 |
---|---|---|---|---|---|
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%) |
|
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v7-04-12-Run1 | GEOS-4 2005 | 11.763 | -0.68 (-5.5%) |
|
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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%) |
|
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v7-02-03-Run1 | GEOS-4 2001 | 11.87 | +1.39 (+13.26%) |
|
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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)