GEOS-Chem model development priorities

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On this page we list the current priorities for GEOS-Chem development. This list is continuously updated based on code readiness and input from the Working Groups and the Steering Committee.

We also invite you to view our GEOS-Chem Support Team project management board on Trello.com, which shows the current GCST workflow.

Priorities assigned to upcoming GEOS-Chem versions

12.3.0

This version is currently in development. See the GEOS-Chem 12 wiki page for details.

12.4.0

The items listed below are slated to be included in GEOS-Chem 12.4.0. This is a feature release which will be validated with a 1-month benchmark simulation and a 1-year benchmark simulation.

Feature Submitted by Type Status
Features affecting the full-chemistry simulation:
Grid-independent dust emissions (hourly) David Ridley (CARB, formerly MIT) Science
  • Data delivered to GCST (Jan 2019)
Grid-independent lightning NOx emissions (3-hourly) Lee Murray (Rochester) Science
  • Data delivered to GCST (Jan 2019)
Grid-independent biogenic emissions (hourly) Jintai Lin (PKU) Science
  • Data delivered to GCST (Jan 2019)
Grid-independent sea salt emissions (hourly) Jintai Lin (PKU) Science
  • Data delivered to GCST (Jan 2019)
Grid-independent soil NOx emissions (hourly) Jintai Lin (PKU) Science
  • Data delivered to GCST (Jan 2019)

Priorities not yet assigned to a particular version

The following items have been identified as priorities for GEOS-Chem, but have not yet been assigned to a particular GEOS-Chem version.

Ready to go in

Feature Submitted by Type Status
Chemistry updates
N2O5, NO3, NO2 reactive uptake updates Viral Shah (UW)
Lyatt Jaegle (UW)
Chris Holmes (FSU)
Erin McDuffie (Dalhousie)
Science
  • Delivered to GCST (Dec 2018)
Cloud reactive uptake of NOx Chris Holmes (FSU) Science
Emissions and surface fluxes updates
Updates to cold-temperature deposition Lyatt Jaegle (UW) Science
Simple parameterization for CO2 dependence of stomatal resistance Amos Tai (CUHK) Science
Wet deposition updates
Wet deposition parameterizations: Henry's law coefficients, etc. Sarah Safieddine (MIT) Science
Aerosol updates
Update to hygroscopic growth Robyn Latimer (Dalhousie)
Randall Martin (Dalhousie)
Science
Sea salt emissions from sea ice Jiayue Huang (UW) Science
Heterogeneous sulfate production Lin Zhang (PKU)
Becky Alexander (UW)
Yuxuan Wang (U. Houston)
Science
  • Described by Shao et al., ACPD, 2019
Transport updates
ND49 timeseries diagnostic for correcting ozone from the height of the lowest model level to 10m]] Katie Travis (MIT) Science
Structural updates
Carbon cycle outputs in xCO2, xCH4 as a diagnostic Beata Bukosa (Wollongong)
Dylan Jones (U. Toronto)
Science

--Melissa Sulprizio (talk) 13:13, 19 February 2019 (UTC)

Almost there (< 6 months)

Item Author(s) Type Status
Transport updates
GEOS resolution & subgrid convection Karen Yu (Harvard)
Bob Yantosca (GCST)
Tailong He (Toronto)
Science
  • Installed in 12.1.0 by Bob Yantosca (Harvard), currently being tested by Tailong He (Toronto)
GCHP updates
New version of MAPL GMAO
Lizzie Lundgren (GCST)
Structural
Use CMake to simplify GCHP build process Liam Bindle (Dalhousie) Structural
Structural updates
FlexGrid Stage 2: Enable nested simulations over any custom domains Jiawei Zhuang (Harvard)
Melissa Sulprizio (GCST)
Structural

--Melissa Sulprizio (talk) 13:13, 19 February 2019 (UTC)

Over the horizon (6-12 months)

Item Author(s) Type Status
Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange Amos Tai (CUHK) Science
Additional modifications for FlexChem, including:
  • Rebuild the pre-built chemistry mechanisms (Standard, Tropchem, SOA-SVPOA) with Kppa
  • Add capability for custom chemistry mechanism by building KPP on-the-fly in GEOS-Chem
GCST Structural
  • Mike Long, who was the principal proponent behind these updates, has since left the GC community.
  • We are not sure who will take this over

--Melissa Sulprizio (talk) 13:13, 19 February 2019 (UTC)

Longer term (12-24 months)

Item Author(s) Type Status
None at this time

--Melissa Sulprizio (talk) 13:13, 19 February 2019 (UTC)