GEOS-Chem versions
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NOTE: The order in which various updates enter into the standard GEOS-Chem code may differ than what is listed here, depending on circumstances.
v8-01-04
Also adds:
v8-01-03
Also adds:
- EPA/NEI99 California transport sector fix
- Updated MEGAN annual emission factors for isoprene
- PERHAPS -- Updated mercury simulation (cf. Noelle, Elsie, Chris, Sarah Strode, etc.)
v8-01-02
Also adds:
- May Fu's updated chemistry mechanism ???
- New scale factors for anthropogenic emissions (cf. Aaron van Donkelaar)
v8-01-01
PUBLIC RELEASE scheduled for April 2008
Contains everything in v7-04-13, with the following additions:
- This is the first version to be compatible with GEOS-5 met fields.
1-Year Benchmarks
Description
- Results from v8-01-01 1-year benchmark simulation (w/ GEOS-5 met) are contained in the FTP directory:
/pub/geos-chem/1yr_benchmarks/v7-04-12/geos5/2005/Run
- This benchmark uses the same input conditions and emissions as v7-04-13. The only difference is that this benchmark was done w/ GEOS-5 met and v7-04-13 was done w/ GEOS-4 met.
The 3 models compared (and their colors on the plots) were:
| Color | Quantity Plotted | Met Field Type | Lightning algorithm |
|---|---|---|---|
| Red | v7-04-12 Run2 | GEOS-4 4x5 | near-land w/ OTD-LIS regional scaling |
| Green | v7-04-13 | GEOS-4 4x5 | updated non-near-land w/ OTD-LIS local scaling |
| Blue | This model version | GEOS-5 4x5 | updated non-near-land w/ OTD-LIS local scaling |
| Black | Observations |
Results
Release Notes
- We have implemented the fix for the Last year of GFED2 biomass emissions, (which is now 2006) into v8-01-01.
v7-04-13
BETA RELEASE November 2007
Contains everything in v7-04-12, with the following additions:
- Offline H2/HD simulation (cf. Lyatt Jaegle et al)
- Bug fix in "smvgear.f" -- due to a design flaw, you could have a situation where you could have negative or zero tracer in a box even if the global & local error criteria were satisfied. If this condition is encountered, we now revert to the concentrations at the end of the previous internal timestep, and then reduce the internal timestep and try again until we get convergence.
- Bug fix -- replace GEMISNOX w/ module arrays to avoid common block errors in lightning & aircraft NOx emissions
- Bug fix -- cap variable tropopause at 200hPa for polar regions (90S-60S and 60N-90N)
- Lee Murray's local lightning redistribution of lightning flashes
- Minor bug fixes for GCAP and diagnostics
1-Year Benchmarks
Description
- Results from 1-year benchmark simulation (w/ GEOS-4 met) are contained in the directory: <tt/pub/geos-chem/1yr_benchmarks/v7-04-12/geos4/2005/Run
- This benchmark uses the same input conditions and emissions as v7-04-12-Run2, except for the updated lightning emissions as described above.
The 3 models compared (and their colors on the plots) were:
| Color | Quantity Plotted | Met Type | Lightning algorithm |
|---|---|---|---|
| Red | v7-04-12 Run1 | GEOS-4 4x5 | ancient |
| Green | v7-04-12 Run2 | GEOS-4 4x5 | near-land w/ OTD-LIS regional scaling |
| Blue | This model version | GEOS-4 4x5 | updated non-near-land w/ OTD-LIS local scaling |
| Black | Observations |
Results
Release Notes
- The maximum year for GFED2 emissions in this version is 2005. If you want to use the 2006 emissions you will have to edit the source code module "gfed2_biomass_mod.f".
v7-04-12
BETA RELEASE October 2007
We have already done the following 1-year benchmark simulations:
1-Year Benchmarks
Run0
In FTP directory: /pub/geos-chem/1yr_benchmarks/v7-04-12/geos4/2001/Run0
- Run w/ 4x5 GEOS-4 for met field year 2001 (spun up thru 2000 & 1999)
- with G-C "old" fossil fuel (GEIA + EPA/NEI99)
- with G-C "default" climatological biomass burning
- with old lightning parameterization
- with MEGAN biogenic emissions
- with SMVGEAR chemistry up to dynamic tropopause
- with new dust emissions (w/ GOCART source function)
- with new TOMS/SBUV ozone columns for FAST-J photolysis
- with variable tropopause on
Run1
In FTP directory: /as2/pub/ftp/pub/geos-chem/1yr_benchmarks/v7-04-12/geos4/2005/Run1
- Run w/ 4x5 GEOS-4 for met field year 2005 (spun up thru 2003 & 2004)
- with G-C "old" fossil fuel (GEIA + EPA/NEI99)
- with G-C "default" climatological biomass burning
- with old lightning parameterization
- with MEGAN biogenic emissions
- with SMVGEAR chemistry up to dynamic tropopause
- with new dust emissions (w/ GOCART source function)
- with new TOMS/SBUV ozone columns for FAST-J photolysis
- with variable tropopause on
Run2
In FTP directory: /pub/geos-chem/1yr_benchmarks/v7-04-12/geos4/2005/Run2
- Run w/ GEOS-4 for met field year 2005 (spun up thru 2003 & 2004)
- with G-C "old" fossil fuel (GEIA + EPA/NEI99)
- with G-C "default" climatological biomass burning
- with new lightning parameterization (with OTD/LIS v2 regional redistribution of flashes)
- with MEGAN biogenic emissions
- with SMVGEAR chemistry up to dynamic tropopause
- with new dust emissions (w/ GOCART source function)
- with new TOMS/SBUV ozone columns for FAST-J photolysis
- with variable tropopause on
Results
Release Notes
- Variable tropopause has bug fix from v7-04-11 but not 200 hPa cap at polar latitudes
- NOTE: There is a bug in this version when lightning emissions are turned off. The bug will be fixed in v7-04-13. For the time being, if you must turn lighting emissions off in v7-04-12, please do this by setting FLASHRATE = 0 in the lightning_nox_nl_mod.f.