GEOS-Chem 12
GEOS-Chem v11-02-final will also carry the designation GEOS-Chem 12.0.0. We are migrating to a purely numeric versioning system in order to adhere more closely to software development best practices. For a complete description of the new versioning system, please see our GEOS-Chem version numbering system wiki page.
Version history
The table below shows the previous, current, and successive major GEOS-Chem versions:
| Previous major release | This version in development | Next major release |
|---|---|---|
| GEOS-Chem v11-02 (aka 12.0.0) | GEOS-Chem 12 | GEOS-Chem 13 |
| TBD | TBD | TBD |
| View v11-02 benchmark history | View GEOS-Chem 12 benchmark history | TBD |
The sections below describe each GEOS-Chem feature version and GEOS-Chem patch version belonging to the GEOS-Chem 12 series. Each feature version has been validated with a 1-month benchmark simulation (and a 1-year benchmark simulation if necessary), and carries the version tag 12.Y.0. Each patch version (tagged as 12.Y.Z) preserves backwards-compatibility with the prior feature version 12.Y.0. For more information, please see our GEOS-Chem version numbering system wiki page.
In the pipeline
Several GEOS-Chem updates have been proposed by the relevant Working Groups, but have not yet been assigned to a specific GEOS-Chem version. For a complete list of these updates, please visit our GEOS-Chem model development priorities page.
GEOS-Chem 12.3.0
The items listed below are slated to be included in GEOS-Chem 12.3.0. This is a feature release which will be validated with a 1-month benchmark simulation.
| Feature | Submitted by | Type | Status |
|---|---|---|---|
| Features affecting the full-chemistry simulation: | |||
| Update ISORROPIA from v2.0 to v2.2, in order to remove persistent noise in output | Seb Eastham (Harvard) | Science |
|
| Update MODIS LAI fields for 2005-2016 using Yuan et al. (2011) | Jenny Fisher (Wollongong) Barron Henderson (US EPA) |
Science |
|
| Extend UCX into the mesosphere | Sebastian Eastham (MIT) | Science | |
| OMI-based Volcanic emissions 2005-2012 | Cui Ge (U. Iowa) Jun Wang (U. Iowa) |
Science |
|
GEOS-Chem 12.2.0
The items listed below are slated to be included in GEOS-Chem 12.2.0. This is a feature release which will be benchmarked with a 1-month benchmark simulation and a 1-year Rn-Pb-Be benchmark simulation.
| Feature | Submitted by | Type | Status |
|---|---|---|---|
| Features NOT affecting the full-chemistry simulation: | |||
| Common set of tracers in GEOS-Chem and GEOS | Transport WG GCST |
Benchmarking |
|
GEOS-Chem 12.1.0
The items listed below are slated to be included in GEOS-Chem 12.1.0. This is a feature release which will be validated with a 1-month benchmark simulation.
| Feature | Submitted by | Type | Status |
|---|---|---|---|
| Features affecting the full-chemistry simulation: | |||
| FlexGrid: Use HEMCO to read met fields and enable nested simulations over any custom domains | Jiawei Zhuang (Harvard) Jintai Lin (PKU) |
Structural |
|
| Anthropogenic PM2.5 dust source | Sajeev Philip (Dalhousie) | Science |
|
| NetCDF Output Phase 3b: Updates to eliminate differences between single and multi-segmented GEOS-Chem runs | GCST Christoph Keller |
Bug Fix & Structural |
|
| Features NOT affecting the full-chemistry simulation: | |||
| Updated flux diagnostics | Chris Holmes (Florida State) GCST |
Structural/ Benchmarking |
|
GEOS-Chem 12.0.0
In order to transition to a new, purely numeric versioning system, the GEOS-Chem v11-02-final release also carries the designation GEOS-Chem v12.0.0.
For a complete description of the new versioning system, please see our GEOS-Chem version numbering system wiki page.
--Bob Yantosca (talk) 15:35, 20 June 2018 (UTC)
New data directories
The following HEMCO data directories have been added or updated for GEOS-Chem v11-02. You will have to download the directories relevant to your simulation.
| Inventory | What was added? | When added? | Directory
|
|---|---|---|---|
Validation
In this section we provide information about the benchmarks and tests that we have done to validate GEOS-Chem v11-03.
1-month and 1-year benchmarks
For complete information about the benchmark simulations used to validate GEOS-Chem v11-03, please see our GEOS-Chem v11-03 benchmark history wiki page.
Unit tests for GEOS-Chem v11-03
We perform a full set of unit tests on GEOS-Chem on an almost daily basis. These tests ensure that each new feature being added does not break any existing functionality.
Here are the unit tests that we ran before submitting 1-month benchmark simulation for v11-03. Click on the links below to see the results from each set of unit tests:
| Unit test | Date |
|---|---|
Previous issues now resolved in GEOS-Chem 12
The following bugs and/or technical issues have been resolved in v11-03.
Outstanding issues not yet resolved in GEOS-Chem 12
The following known issues are slated to be fixed in v11-03:
FlexChem bug fix: do not zero ACTA, EOH, HCOOH
This fix will be included in GEOS-Chem 12.
Katie Travis wrote:
I am working on a VOC simulation, and noticed that in my copy of v11-02f, the following species are set to zero in two places:
! Zero certain species
C(ind_ACTA) = 0.e0_dp
C(ind_EOH) = 0.e0_dp
C(ind_HCOOH) = 0.e0_dp
And
C(ind_ACTA) = 0.0_dp C(ind_HCOOH) = 0.0_dp
Since none of these species are fixed in Tropchem.eqn, shouldn’t they NOT be set to zero?
Mike Long wrote:'
I think the code should be removed. This must have been a patch added to maintain parity with SMVGEAR w/o anticipating that the species would become active.
--Bob Yantosca (talk) 16:19, 17 May 2018 (UTC)
Avoid double counting CEDS and GEIA NH3 biofuel emissions
This fix will be included GEOS-Chem 12.
Eloise Marais wrote:
If CEDS includes NH3 emissions, then this will be double counting. I recommend using CEDS, as GEIA is very out of date (1998 according to the HEMCO configuration file I have).
Daniel Jacob replied:
We should use the GEIA NH3 natural emission inventory (1° x 1° file from Eleanor Morris) but not the GEIA NH3 biofuel inventory.
--Bob Yantosca (talk) 16:33, 17 May 2018 (UTC)