GEOS-Chem v9-02 benchmark history
On this page we have posted complete information about all benchmark simulations (both 1-month and 1-year) for GEOS-Chem v9-02.
Contents
1-year benchmarks
v9-02f
Run0
Three GEOS-Chem model versions were compared to each other:
Color | Quantity Plotted | Met Type | Anthro emissions | Soil NOx emissions | Tropospheric chemistry mechanism | Linoz | Annual Mean OH [105 molec/cm3] |
---|---|---|---|---|---|---|---|
Red | v9-01-03r-Run1 | GEOS-5, 4x5 | Same as v9-01-03r-Run0 | Original soil NOx algorithm based on Yienger & Levy [1995] | Same as v8-02-01-Run0 + Bromine chemistry mechanism |
ON | 11.356 |
Green | v9-02b-Run0 | GEOS-5, 4x5 | " " | New soil NOx emission module | " " | ON | 11.424 |
Blue | v9-02f-Run0 | GEOS-5, 4x5 | " " | " " | + Inorganic chemistry updates + Methyl peroxy nitrate (MPN) chemistry |
ON | 11.503 |
Black | Observations |
The output plots for Run0 (both PostScript and PDF format) may be downloaded from:
ftp ftp.as.harvard.edu cd gcgrid/geos-chem/1yr_benchmarks/v9-02/v9-02f/Run0/output/ps mget * cd gcgrid/geos-chem/1yr_benchmarks/v9-02/v9-02f/Run0/output/pdf mget *
You may also view the PDF files online by pointing your browser to
http://ftp.as.harvard.edu/pub/index/geos-chem/1yr_benchmarks/v9-02/v9-02f/Run0/output/pdf/
--Melissa Payer 18:06, 18 March 2013 (EDT)
1-month benchmarks
v9-02g
Here is the assessment form for 1-month benchmark simulation v9-02g.
Description | |
---|---|
New features added into GEOS-Chem: | |
Developer name(s) and institution(s): |
|
Version, resolution, met fields used: | v9-02, GEOS-5 (47L), 4x5 |
1-month benchmark finished on: | TBD |
Performance statistics: |
|
Compared to previous benchmark: | v9-02f |
This update will impact: (select all that apply with boldface) |
Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify): |
Plots may be viewed at: | ftp://ftp.as.harvard.edu/pub/exchange/mpayer/1mo_quick_look/v9-02g/ |
Metrics | |
Global mean OH (from log file): | TBD x 105 molec/cm3 |
Methyl chloroform lifetime: | TBD years |
Did either of these change by more than 5%? | TBD |
At the SURFACE, list all species that changed by 10% or more: | |
Comments on SURFACE differences: | |
At 500 hPa, list all species that changed by 10% or more: | |
Comments on 500 hPa differences: | |
In the ZONAL MEAN differences, list all species that changed by 10% or more: | |
Comments on ZONAL MEAN differences: | |
In the EMISSION RATIO maps, list all species that changed by 10% or more: | |
Comments on EMISSION RATIO differences: | |
Additional or summary comments: | |
Approval | |
Requires further investigation: | TBD |
Approved: | TBD |
Date of approval: | TBD |
--Melissa Payer 10:56, 12 February 2013 (EST)
v9-02f
Here is the assessment form for 1-month benchmark simulation v9-02f.
Description | |
---|---|
New features added into GEOS-Chem: | |
Developer name(s) and institution(s): |
|
Version, resolution, met fields used: | v9-02, GEOS-5 (47L), 4x5 |
1-month benchmark finished on: | Wed Jan 30 16:36:48 EST 2013 |
Performance statistics: |
|
Compared to previous benchmark: | v9-02e |
This update will impact: (select all that apply with boldface) |
Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify): |
Plots may be viewed at: | ftp://ftp.as.harvard.edu/pub/exchange/mpayer/1mo_quick_look/v9-02f/ |
Metrics | |
Global mean OH (from log file): | 12.9589397348900 x 105 molec/cm3 |
Methyl chloroform lifetime: | 4.8396 years |
Did either of these change by more than 5%? | No |
At the SURFACE, list all species that changed by 10% or more: | ISOP, MVK, MACR, PMN
N2O5 HNO4 DMS, MSA Br, BrO, Other bromine compounds |
Comments on SURFACE differences: | Isoprene related tracers: Concentrations are changing over remote oceanic regions reflecting changes in the initial oxidation steps of these compounds.
N2O5 changes are again is restricted to remote ocean regions. Changes to the NO3+DMS rate constant have made this faster which will tend to reduce NO3 and N2O5 concentrations in regions where DMS is the dominant VOC DMS, MSA Concentrations are changing due to changes in the DMS+OH and DMS+NO3 rate constants. At the surface changes are small and restricted to continental regions. Br compounds. These are restricted to the polar regions where concentrations are low and reflects the combination of other changes of longer lived species. The same is the case for HNO3. |
At 500 hPa, list all species that changed by 10% or more: | NOx
ISOP, MVK, MACR, PMN N2O5 HNO4 PRPE DMS, MSA NIT, NH4 Br species |
Comments on 500 hPa differences: | The largest changes here are to the DMS and MSA. This reflects the changes in the DMS+OH and DMS+NO3 oxidation routes which essentially both changes the location of DMS oxidation and the branching ratio of the DMS Oxidation
isoprene chemistry changes again reflect changes in the primary oxidation of isoprene and the subsquent branching ration NIT, NH4 Isoropia seems unstable at cold temperatures and small changes leads to large relative changes in these compounds even though they are at low concentrations. N2O5, HNO4, Br species see above. |
In the ZONAL MEAN differences, list all species that changed by 10% or more: | NOx
ISOP, MVK, MACR, PMN PRPE CH2O N2O5 HNO4 MP DMS, MSA, SO2 Br compounds |
Comments on ZONAL MEAN differences: | NOx, HNO3, H2O2, CH2O, MP Reflect that changes seen in Browne et al., 2011
DMS, MSA, SO2 reflect changes in the initial DMS oxidation of DMS+OH and DMS+NO3 ISOP, MACR, MVK, PMN changes reflect changes in the ISOP oxidation ISOP+OH, O3, NO3 The N2O5 decrease at ~200 hPa in the zonal mean is also consistent with Browne et al., 2011 |
In the EMISSION RATIO maps, list all species that changed by 10% or more: | No |
Comments on EMISSION RATIO differences: | N/A |
Additional or summary comments: | This all seems fine. In general changes are small in absolute concentrations but can be relatively large fractionally. |
Approval | |
Requires further investigation: | No |
Approved: | MJE as long as others are happy. |
Date of approval: | 07 Feb 2013 |
--Melissa Payer 09:31, 1 February 2013 (EST)
v9-02e
Here is the assessment form for 1-month benchmark simulation v9-02e.
Description | |
---|---|
New features added into GEOS-Chem: | |
Developer name(s) and institution(s): |
|
Version, resolution, met fields used: | v9-02, GEOS-5 (47L), 4x5 |
1-month benchmark finished on: | Fri Jan 4 17:01:07 EST 2013 |
Performance statistics: |
|
Compared to previous benchmark: | v9-02d |
This update will impact: (select all that apply with boldface) |
Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify): |
Plots may be viewed at: | ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v9-02/v9-02e/ |
Metrics | |
Global mean OH (from log file): | 12.9399839759816 x 105 molec/cm3 |
Methyl chloroform lifetime: | 4.8585 years |
Did either of these change by more than 5%? | No |
At the SURFACE, list all species that changed by 10% or more: | ISOP, NIT |
Comments on SURFACE differences: | Differences are attributed to the numerical noise issue in ISORROPIA II. |
At 500 hPa, list all species that changed by 10% or more: | ISOP, NH3, NIT |
Comments on 500 hPa differences: | Differences are attributed to the numerical noise issue in ISORROPIA II. |
In the ZONAL MEAN differences, list all species that changed by 10% or more: | ALK4, PMN, PRPE, C3H8, SO4s, NH3, NIT, NITs |
Comments on ZONAL MEAN differences: | Differences are seen in ALK4, PMN, PRPE, C3H8, SO4s, NH3, and NITs are in locations where concentrations are already very low. These differences can be attributed to numerical noise. Differences in NH3 and NITs are attributed to the numerical noise issue in ISORROPIA II. |
In the EMISSION RATIO maps, list all species that changed by 10% or more: | None |
Comments on EMISSION RATIO differences: | The bug fix for regridding of Streets anthropogenic emissions caused CO anthropogenic emissions to change by 0.004 Tg (~0.01%). |
Additional or summary comments: | |
Approval | |
Requires further investigation: | No |
Approved: | Yes |
Date of approval: | 07 Jan 2013 |
--Melissa Payer 16:01, 7 January 2013 (EST)
v9-02d
Here is the assessment form for 1-month benchmark simulation v9-02d.
Description | |
---|---|
New features added into GEOS-Chem: | |
Developer name(s) and institution(s): |
|
Version, resolution, met fields used: | v9-02, GEOS-5 (47L), 4x5 |
1-month benchmark finished on: | Wed Dec 19 09:33:39 EST 2012 |
Performance statistics: |
|
Compared to previous benchmark: | v9-02c |
This update will impact: (select all that apply with boldface) |
Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify): We expected to see no changes from v9-02d. We have only made structural modifications but not scientific modifications. |
Plots may be viewed at: | ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v9-02/v9-02d/ |
Metrics | |
Global mean OH (from log file): | 12.9397354478399 x 105 molec/cm3 |
Methyl chloroform lifetime: | 4.8586 years |
Did either of these change by more than 5%? | No |
At the SURFACE, list all species that changed by 10% or more: | NIT |
Comments on SURFACE differences: | Differences in NIT are attributed to the numerical noise issue in ISORROPIA II. |
At 500 hPa, list all species that changed by 10% or more: | ISOP, NH3, NIT |
Comments on 500 hPa differences: | Differences are seen in ISOP in locations where concentrations are already very low (i.e. over oceans). These differences are attributed to the bromine bug fix.
Differences in NH3 and NIT are attributed to the numerical noise issue in ISORROPIA II. |
In the ZONAL MEAN differences, list all species that changed by 10% or more: | ALK4, ISOP, PRPE, C3H8, SO4s, NH3, NIT, NITs, Br2, |
Comments on ZONAL MEAN differences: | Differences are seen in ALK4, ISOP, PRPE, C3H8, SO4s, and Br2 are in locations where concentrations are already very low. These differences are attributed to the bromine bug fix.
Differences in NH3 and NIT are attributed to the numerical noise issue in ISORROPIA II. |
In the EMISSION RATIO maps, list all species that changed by 10% or more: | None |
Comments on EMISSION RATIO differences: | |
Additional or summary comments: | When ISORROPIA is turned off, and when the Bug fix for Br2 emissions is also added to v9-02c, then we obtain identical results between v9-02c and v9-02d. This demonstrates that the structural modifications made for grid independence do not change GEOS-Chem's scientific results. Most of these modifications were made to carry data fields in derived-type objects rather than in module arrays, but the data fields themselves have not changed. |
Approval | |
Requires further investigation: | No |
Approved: | Yes |
Date of approval: | 19 Dec 2012 |
--Bob Y. 10:39, 19 December 2012 (EST)
v9-02c
Here is the assessment form for 1-month benchmark simulation v9-02c.
Description | |
---|---|
New features added into GEOS-Chem: | |
Developer name(s) and institution(s): |
|
Version, resolution, met fields used: | v9-02, GEOS-5 (47L), 4x5 |
1-month benchmark finished on: | Wed Nov 28 22:37:00 EST 2012 |
Performance statistics: |
|
Compared to previous benchmark: | v9-02b |
This update will impact: (select all that apply with boldface) |
Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify): We expect to see no changes from v9-02b |
Plots may be viewed at: | ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v9-02/v9-02c/ |
Metrics | |
Global mean OH (from log file): | 12.9398281506753 x 105 molec/cm3 |
Methyl chloroform lifetime: | 4.8585 years |
Did either of these change by more than 5%? | No |
At the SURFACE, list all species that changed by 10% or more: | None |
Comments on SURFACE differences: | |
At 500 hPa, list all species that changed by 10% or more: | None |
Comments on 500 hPa differences: | |
In the ZONAL MEAN differences, list all species that changed by 10% or more: | None |
Comments on ZONAL MEAN differences: | |
In the EMISSION RATIO maps, list all species that changed by 10% or more: | None |
Comments on EMISSION RATIO differences: | |
Additional or summary comments: | |
Approval | |
Requires further investigation: | No |
Approved: | Yes |
Date of approval: | 29 Nov 2012 |
--Melissa Payer 16:58, 27 November 2012 (EST)
v9-02b
Here is the assessment form for 1-month benchmark simulation v9-02b.
Description | |
---|---|
New features added into GEOS-Chem: | |
Developer name(s) and institution(s): |
|
Version, resolution, met fields used: | v9-02, GEOS-5 (47L), 4x5 |
1-month benchmark finished on: | Wed Oct 24 16:10:25 EDT 2012 |
Performance statistics: |
|
Compared to previous benchmark: | v9-02a |
This update will impact: (select all that apply with boldface) |
Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify): Soil NOx emissions |
Plots may be viewed at: | ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v9-02/v9-02b/ |
Metrics | |
Global mean OH (from log file): | 12.9398281506753 x 105 molec/cm3 |
Methyl chloroform lifetime: | 4.8585 years |
Did either of these change by more than 5%? | No |
At the SURFACE, list all species that changed by 10% or more: | NOx, Ox, PAN, ALK4, ISOP, HNO3, H2O2, MEk, ALD2, RCHO, MVK, MACR, PMN, PPN, R4N2, PRPE, C3H8, CH2O, N2O5, HNO4, MP, DMS, SO2, SO4, SO4s, MSA, NH3, NH4, NIT, NITs, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, and OH |
Comments on SURFACE differences: | The changes are as expected. The new soil NOx parameterization significantly increases the NOx concentrations over North America, the southern part of South America, Central Asia and parts of Africa. Decreases occur over the northern part of South America, central Africa and Indonesia.
Other species are influenced by resulting changes in O3 (and consequently OH). However, some of the reported changes are mainly caused by noise since the absolute differences are very close to zero. |
At 500 hPa, list all species that changed by 10% or more: | NOx, PAN, ALK4, ISOP, HNO3, MEK, ALD2, RCHO, MVK, MACR, PMN, PPN, PRPE, N2O5, HNO4, MP, DMS, SO2, MSA, NH3, NIT, NITs, Br2, Br, BrO, HOBr, HBr, BrNO2, BrNO3, and OH |
Comments on 500 hPa differences: | See 'Comments on SURFACE differences' |
In the ZONAL MEAN differences, list all species that changed by 10% or more: | NOx, PAN, ISOP, HNO3, MEK, RCHO, MVK, MACR, PMN, PPN, PRPE, N2O5, HNO4, DMS, SO4s, NH3, NIT, NITs, Br, BrO, BrNO2, BrNO3 and OH. |
Comments on ZONAL MEAN differences: | See 'Comments on SURFACE differences' |
In the EMISSION RATIO maps, list all species that changed by 10% or more: | NOx fertilizer emissions and NOx soil emissions |
Comments on EMISSION RATIO differences: | The NOx soil emissions diagnostic now includes the NOx fertilizer emissions since the emissions related to fertilizer are now calculated using the same procedure as the “regular” soil emissions based on the biome emission coefficients. The soil NOx emission total increases with 0.310 Tg N to 1.028 Tg N for July.
The fertilizer emissions diagnostics gives the soil NOx emissions related to fertilizer use and deposited nitrogen. |
Additional or summary comments: | The occurring changes are as expected. The benchmark is performed using a new soil NOx restart file which saves per grid cell:
The overall changes are in NOx emissions are consistent with those in Hudman et al. (2012) with the additional canopy reduction that Bram added. The changes in O3 and OH follow the changes in NOx emissions. |
Approval | |
Requires further investigation: | No |
Approved: | Randall Martin, Bram Maasakkers |
Date of approval: | 29 Oct 2012 |
--Melissa Payer 13:42, 24 October 2012 (EDT)
v9-02a
Here is the assessment form for 1-month benchmark simulation v9-02a.
Description | |
---|---|
New features added into GEOS-Chem: | |
Developer name(s) and institution(s): |
|
Version, resolution, met fields used: | v9-02, GEOS-5 (47L), 4x5 |
1-month benchmark finished on: | Fri Oct 12 17:58:19 EDT 2012 |
Performance statistics: |
|
Compared to previous benchmark: | v9-01-03-Fix_for_IFORT12 |
This update will impact: (select all that apply with boldface) |
Advection, BL Mixing, Convection, Met Fields, Dry Dep, Wet Dep, Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Other (please specify): |
Plots may be viewed at: | ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1mo_benchmarks/v9-02/v9-02a/ |
Metrics | |
Global mean OH (from log file): | 12.8727104044567 x 105 molec/cm3 |
Methyl chloroform lifetime: | 4.8983 years |
Did either of these change by more than 5%? | No |
At the SURFACE, list all species that changed by 10% or more: | All species |
Comments on SURFACE differences: | Expected. Change in boundary layer mixing |
At 500 hPa, list all species that changed by 10% or more: | DST4, NITS, NH3, DMS, PRPE, MACR, ISOP (over Ocean) and NIT (over Land) |
Comments on 500 hPa differences: | Change in boundary layer mixing |
In the ZONAL MEAN differences, list all species that changed by 10% or more: | All species |
Comments on ZONAL MEAN differences: | Change in boundary layer mixing |
In the EMISSION RATIO maps, list all species that changed by 10% or more: | None |
Comments on EMISSION RATIO differences: | None |
Additional or summary comments: | None |
Approval | |
Requires further investigation: | No |
Approved: | Yes |
Date of approval: | Approved 16 Oct 2012 |
--Melissa Payer 12:00, 15 October 2012 (EDT)