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:

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

v7-04-13

BETA RELEASE November 2007

Contains everything in v7-04-12, with the following additions:

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

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

  1. Variable tropopause has bug fix from v7-04-11 but not 200 hPa cap at polar latitudes
  2. 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.