GEOS-Chem model development priorities: Difference between revisions

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'''''[[Main_Page|GEOS-Chem Main Page]] | [[GCHP_Main_Page|GCHP Main Page]]'''''
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 [https://geos-chem.seas.harvard.edu/geos-working-groups Working Groups] and the [https://geos-chem.seas.harvard.edu/geos-steering-cmte Steering Committee]. For history of past releases see the [[GEOS-Chem_versions|'''GEOS-Chem Versions wiki page''']].
 
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 [http://acmg.seas.harvard.edu/geos/geos_working_groups.html Working Groups] and the [http://acmg.seas.harvard.edu/geos/geos_steering_cmte.html Steering Committee]. For history of past releases see the [[GEOS-Chem_versions|GEOS-Chem Versions wiki page]].
 
== Release schedule ==
 
Please see the [http://wiki.seas.harvard.edu/geos-chem/images/e/e1/GEOS-Chem_Release_Proposal.pdf GEOS-Chem Release Proposal] outlining the procedure and schedule for releasing GEOS-Chem versions.  


== Merged and awaiting release ==
== Merged and awaiting release ==
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{| border=1 cellspacing=0 cellpadding=5  
{| border=1 cellspacing=0 cellpadding=5  
|-bgcolor="#CCCCCC"
|-bgcolor="#CCCCCC"
!width="200px"|Patch version in development
!width="300px"|Mergeable at any time
!width="200px"|Minor version in development
!width="200px"|Version in development


|-valign="top"
|-valign="top"
|align="center"| -
|align="center"|'''[[GEOS-Chem no-diff-to-benchmark]]'''
|align="center"|'''[[GEOS-Chem 13.4.0]]'''
|align="center"|'''[[GEOS-Chem 14.6.0]]'''


|}
|}
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== Feature integration in progress ==
== Feature integration in progress ==


Features listed in this table are actively being integrated into GEOS-Chem by the [[GEOS-Chem Support Team]]. In addition, we continuously implement structural updates in the model to maintain and develop coupling with other models including GEOS, CESM, and the model adjoint.  
Features listed in this table are actively being integrated into GEOS-Chem by the [https://geoschem.github.io/support-team.html GEOS-Chem Support Team]. In addition, we continuously implement structural updates in the model to maintain and develop coupling with other models including GEOS, CESM, and the model adjoint.  


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{| border=1 cellspacing=0 cellpadding=5  
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|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/pull/990 Change State_Chm%Species from 4D to vector of 3D arrays]
|New version of CEDS at 0.1 deg
|Lizzie Lundgren (GCST)
|Dandan Zhang (WashU)
|Structural
|Emissions
|Medium
|Simple
|
|
*Done, slated for 14.0.0
*[https://github.com/geoschem/geos-chem/pull/2171 geos-chem PR #2171]


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/discussions/1111 Convert input.geos to YAML and rename]
|Use USTAR read from GEOS instead of calculating from U10M and V10M
|Bob Yantosca (GCST)
|Yuanjian Zhang (WashU)
|Run directories
|Emissions
|Medium
|Simple
|
|
* See [https://github.com/geoschem/geos-chem/discussions/1111 geoschem/geos-chem #1111]
*[https://github.com/geoschem/HEMCO/pull/279 HEMCO PR #279]
* In testing, slated for 14.0.0
*NOTE: WashU will recompute mass tuning factors for each met field & resolution (GCClassic)


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/GCHP/pull/214 Upgrade GMAO libraries in GCHP]
|Carbon simulation fixes in GCClassic and GCHP
|Liam Bindle (GCST) <br> Lizzie Lundgren (GCST)
|Melissa Sulprizio (Harvard)<br>Lizzie Lundgren (Harvard)
|Structural
|Carbon simulation
|Easy
|Medium
|
|
*Done, slated for 14.0.0
*[https://github.com/geoschem/GCHP/issues/440 GCHP issue #440]
*[https://github.com/geoschem/geos-chem/issues/2463 geos-chem issue #2463]
*[https://github.com/geoschem/geos-chem/pull/2510 geos-chem PR #2510]


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/pull/1198 Fixes to remove differences when restarting the model]
|Investigate potential performance gains of replacing the KPP Rosenbrock solver with the LSODE solver
|Lizzie Lundgren (GCST)
|Bob Yantosca (Harvard)
|Bug fixes
|Chemistry
|Medium
|Medium
|
|
*Done for GCHP, slated for 14.0.0
*[https://github.com/geoschem/geos-chem/pull/2482 geos-chem PR #2482]
*More fixes for GC-Classic will be a later update
*[https://github.com/geoschem/geos-chem/pull/2483 geos-chem PR #2483]


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/331 Provide climatologies for open fire emissions]
|Fix obspack - not working in 14.4.0
|Melissa Sulprizio (GCST)
|Bob Yantosca (Harvard)
|Emissions
|Diagnostics
|Easy
|Medium
|
|
*[https://github.com/geoschem/geos-chem/issues/2328 geos-chem issue #2328]


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/655 Climatologies for lightning NOx]
|Make GC-Classic bit-for-bit reproducible upon restart<br>(part 1 of 2)
|Lee Murray (Rochester)<br>Melissa Sulprizio (GCST)
|Lizzie Lundgren (Harvard)
|Emissions
|GC-Classic
|Easy
|Medium
|
|
*[https://github.com/geoschem/geos-chem/pull/2521 geos-chem PR #2521]


|-valign="top"
|-valign="top"
|[[Grid-independent_emissions|Updated offline biogenic emissions]]
|Capture all trop and PBL height changes in budget diagnostics
|Hongjian Weng (PKU)
|Chris Holmes (FSU)<br>Lizzie Lundgren (Harvard)
|Emissions
|Diagnostics
|Easy
|Medium
|
|
*Delivered to GCST (Dec 2021)
*[https://github.com/geoschem/geos-chem/pull/2103 geos-chem PR 2103]


|-valign="top"
|-valign="top"
|[[Grid-independent_emissions|Updated offline soil NOx emissions]]
|Derive convective precipitation flux if using FP/IT generated with Grell-Freitas
|Hongjian Weng (PKU)
|Yuanjian Zhang (WashU)<br>Viral Shah (GMAO)<br>Lizzie Lundgren (Harvard)
|Emissions
|Convection
|Easy
|Medium
|
|
*Delivered to GCST (Dec 2021)
*[https://github.com/geoschem/geos-chem/issues/2469 geos-chem Issue #2469]
*[https://github.com/geoschem/geos-chem/pull/2523 geos-chem PR #2523]


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/discussions/1022 Add new species concentration diagnostic in units of molec/cm3]
|GCHP mass flux fixes
|GCST
|Yuanjian Zhang (WashU)
|Diagnostics
|GCHP
|Easy
|Simple
|
|
*See [https://github.com/geoschem/geos-chem/issues/1022 geoschem/geos-chem #1022]
*[https://github.com/geoschem/GCHP/pull/456 GCHP PR 456]


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/770 Output satellite diagnostics as NetCDF]
|HEMCO log print updates
|Eloise Marais (UCL)  
|Lizzie Lundgren (Harvard)
|Diagnostics
|ESMs
|Easy
|Medium
|
|
*See [https://github.com/geoschem/geos-chem/pull/1134 geoschem/geos-chem #1134]
*[https://github.com/geoschem/HEMCO/pull/296 HEMCO PR 296]


|-valign="top"
|-valign="top"
|Upgrade Fast-JX to Cloud-J
|Fix yaml reader bug with certain compilers
|Lizzie Lundgren (GCST)
|Lizzie Lundgren (Harvard)
|Structural
|Build
|Difficult
|Simple
|
|
* [https://github.com/geoschem/cloud-j geoschem/cloud-j]
*[https://github.com/geoschem/geos-chem/pull/2486 geos-chem PR 2486]
*Ongoing


|}
|}


== Feature integration in the queue ==
== Prioritized and in the queue ==


Features listed in this table have been delivered to the GEOS-Chem Support Team and are prioritized to be integrated into GEOS-Chem in the near future.
Features listed in this table are prioritized for integration into GEOS-Chem in the near future.


{| border=1 cellspacing=0 cellpadding=5  
{| border=1 cellspacing=0 cellpadding=5  
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!width="100px"|Model scope
!width="100px"|Model scope
!width="100px"|Ease of implementation
!width="100px"|Ease of implementation
!width="100px"|Delivery status
!width="300px"|Notes and References
!width="300px"|Notes and References


|-valign="top"
|Retire CH4, CO2, tagCO simulations in favor of carbon simulation
|Melissa Sulprizio (Harvard)
|Carbon gases
|Simple
|
|
*[https://github.com/geoschem/geos-chem/issues/2387 geos-chem issue #2387]
|-valign="top"
|Correct the issue that injection height has been artificially decreased by HEMCO
|Lixu Jun (Montana)
|Emissions
|Simple
|Delivered<br>June 2024
|
*[https://github.com/geoschem/geos-chem/issues/2330 geos-chem issue #2330]
*[https://github.com/geoschem/geos-chem/pull/2358 geos-chem PR #2358]


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2475/2020/gmd-13-2475-2020.pdf Adaptive chemical solver] (as option)
|Capability to run GCClassic at 0.125x0.15625 resolution
|Mike Long (Harvard) <br> Haipeng Lin (Harvard) <br> Bob Yantosca (GCST) <br> Lu Shen (PKU)
|Melissa Sulprizio (Harvard)<br>Xiaolin Wang (Harvard)
|Chemistry
|Nested grid
|Difficult
|Simple
|Delivered
|
|
*In testing, publication expected in mid-to-late 2022
*[https://github.com/geoschem/geos-chem/pull/1980 geos-chem PR #1980]
*Previous literature: [https://gmd.copernicus.org/articles/15/1677/2022/ Shen et al., 2022], [https://gmd.copernicus.org/articles/13/2475/2020/ Shen et al., 2020]
*[https://github.com/geoschem/HEMCO/pull/290 HEMCO PR #290]


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2569/2020/ MEGAN3]
|Strat-adjusted RF in GCC and GCHP
|Sam Silva (MIT)
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|Emissions
|Radiation
|Medium
|Simple
|Delivered
|
|
*DOI: [https://zenodo.org/record/3614062#.XzvrH5NKjOR 10.5281/zenodo.3614062]
*[https://github.com/geoschem/geos-chem/pull/2525 geos-chem PR #2525]
*Sam Silva and GCST will work on updating this to a more recent GEOS-Chem version in the near future


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2569/2020/ Canopy Physics Model]
|Archived TCR-2 OH fields for carbon simulations
|Sam Silva (MIT)
|Kazu Miyazaki (JPL)<br>Melissa Sulprizio (Harvard)
|Emissions &<br>Science
|Input data
|Medium
|Simple
|Data delivered<br>Oct 2024
|
|
*DOI: [https://zenodo.org/record/3614062#.XzvrH5NKjOR 10.5281/zenodo.3614062]
*This will be the default OH, but users will have the option of selecting other OH fields
*Sam Silva and GCST will work on updating this to a more recent GEOS-Chem version in the near future
*[https://github.com/geoschem/geos-chem/issues/2537 geos-chem issue #2537]


|-valign="top"
|-valign="top"
|[https://acp.copernicus.org/articles/19/7055/2019/ Joint CO2-CO-CH4-OCS simulation]
|Dust non-sphericity impacts on optical properties
|Beata Bukosa (NIWA)<br>Kevin Bowman (JPL)<br>Mike Long (GCST/Contractor)
|Inderjeet Singh (WashU)
|Specialty simulation
|Aerosols
|Medium
|Medium
|Not yet delivered
|
|
* [https://github.com/geoschem/geos-chem/issues/654 geoschem/geos-chem #654]
*Ideally implemented as a chemical mechanism in KPP


|}
|}


== Feature integration not yet prioritized ==
== Ready to go in ==


Features listed in this table have been delivered to the GEOS-Chem Support Team but are not yet prioritized for integrating into the model.
Features listed in this table are ready to go in but have either not been delivered or are not yet prioritized for integration into GEOS-Chem.


{| border=1 cellspacing=0 cellpadding=5  
{| border=1 cellspacing=0 cellpadding=5  
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!width="200px"|Contributor(s)
!width="200px"|Contributor(s)
!width="100px"|Model scope
!width="100px"|Model scope
!width="100px"|Ease of implementation
!width="100px"|Delivery status
!width="300px"|Notes and References
!width="300px"|Notes and Refereneces
 
 
|-valign="top"
|Binary Activity Thermodynamic (BAT) model for non-ideal mixing of water and organics in organic aerosol
|Camilo Serrano (McGill)<br>Andreas Zuend (McGill)
|Aerosols
|Not delivered
|
*[https://github.com/geoschem/geos-chem/issues/2392 geos-chem issue #2392]
 
|-valign="top"
|Update UCX to include gravitational settling of aerosol species beyond just BCPI
|Conor Barker (UCL)<br>Eloise Marais (UCL)
|Aerosols
|Not delivered
|
 
|-valign="top"
|Seasalt aerosol from sea ice leads (2002-2011)
|Hannah Horrowitz (UIUC)
|Aerosols
|Not delivered
|
*Offline and online, ready to go in HEMCO (optional in addition to existing seasalt emissions)
 
|-valign="top"
|Global organic N dep from various emissions; nitrate aromatics updates
|May Fu (SUSTech)
|Chemistry +<br>Deposition
|Not delivered
|
 
|-valign="top"
|Dry deposition to F90 to improve readability
|Chris Holmes (FSU)
|Dry Deposition
|Not delivered
|
*[https://github.com/geoschem/geos-chem/issues/2389 geos-chem issue #2389]
 
|-valign="top"
|Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange
|Joey Lam  (CUHK)<br>Amos Tai (CUHK)
|Dry deposition
|Delivered<br>Feb 2021
|
*[https://github.com/geoschem/geos-chem/pull/629 geos-chem PR #629]
 
|-valign="top"
|FRP-based fire emissions for eastern US at 0.2 (2019-2020)
|Chris Holmes (FSU)
|Emissions
|Not delivered
|
*[https://github.com/geoschem/geos-chem/issues/2388 geos-chem issue #2388]
 
|-valign="top"
|China agriculture NH3 emissions
|Amos Tai (CUHK)
|Emissions
|Not delivered
|


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/1094 Stratospheric adjustment with RRTMG in GEOS-Chem]
|T-dependent anthropogenic VOCs
|Seb Eastham (MIT)
|May Fu (SUSTech)
|Science
|Emissions
|Medium
|Not delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/1094 geoschem/geos-chem #1094]
*Option. Requires processing existing anthropogenic VOC emissions to generate offline emissions to read in. Parameterised for China.  


|-valign="top"
|-valign="top"
|[https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2006GL026015 Stratospheric HCN chemistry]
|New source functions for transport tracers beryllium-7 and beryllium-10
|Armin Kleinbohl (JPL)<br>Debra Weisenstein (Harvard, retired)
|Minjie Zheng (ETH)
|Chemistry
|Emissions
|Medium
|Delivered<br>June 2024
|
|
*Delivered to GCST (Jun 2020)
*Available at https://zenodo.org/records/8372652


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/1137/2020/ GC-YIBs biosphere-atmospheric chemistry coupled model]
|LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100
|Xu Yue (NUIST)
|Yang Li (Baylor U)<br>Loretta Mickley (Harvard)
|Science
|Emissions
|Easy
|Delivered
|
|
* [https://github.com/geoschem/geos-chem/issues/425 geoschem/geos-chem #425]
*Data involves many files- need to think about temporal frequency


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/pull/629 Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange]
|Australian Hg emissions (2000-2019)
|Joey Lam(CUHK)<br>Amos Tai (CUHK)
|Stephen MacFarlane (Wollongong)<br>Jenny Fisher (Wollongong)
|Science
|Emissions
|Easy
|Not delivered
|
|
*Delivered to GCST (Feb 2021)
*[https://pubs.rsc.org/en/content/articlelanding/2022/em/d2em00019a MacFarlane et al. (2024)]
* [https://github.com/geoschem/geos-chem/pull/629 geoschem/geos-chem #629]
*Includes emissions from black and brown coal power plants, various metal production/processing sources (Aluminium, gold, copper, lead, etc), waste products, cement production, oil refining and petroleum, chlor alkali plants, and cremation


|-valign="top"
|-valign="top"
|[[Stratospheric_chemistry#Treatment_of_the_mesosphere_in_UCX_simulations|Extend UCX into the mesosphere]]
|Hg geogenic emissions (volcanic, rock weathering)
|Sebastian Eastham (MIT)<br>Eric Fleming (NASA GMAO)
|Eric Roy (MIT)
|Chemistry
|Emissions
|Easy
|Not delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/2361 geos-chem #2361]
*[https://gmd.copernicus.org/preprints/gmd-2024-65/ Dastoor et al. (2024)]


|-valign="top"
|-valign="top"
|Landcover/Fire Emissions Offline LPJlmfire
|Hg biomass burning - FINN2.5 & GFED4
|Loretta Mickley (Harvard)<br>Yang Li (Harvard)
|Eric Roy (MIT)
|Emissions
|Emissions
|Easy
|Not delivered
|
*[https://github.com/geoschem/geos-chem/issues/2361 geos-chem #2361]
*[https://gmd.copernicus.org/preprints/gmd-2024-65/ Dastoor et al. (2024)]
 
|-valign="top"
|BCC-GC online
|Lin Zhang (PKU)
|External Model
|Not delivered
|
 
|-valign="top"
|GC-YIBS with online fire emissions
|Xu Yue (NUIST)<br>Hong Liao (NUIST)
|External Model
|Not delivered
|
 
|-valign="top"
|GISS-GC offline (GCAP)
|Lee Murray (Rochester)
|GCAP
|Not delivered
|
|
*Data files delivered to GCST (July 2021)


|}
|}
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|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/559 Implement H2 chemistry in UCX]
|Fixes to stratospheric aerosol settling
|Chris Holmes (FSU)
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|Aerosols
|
 
|-valign="top"
|DMS chemistry in v14
|Linia Tashmim (UCR)<br>Will Porter (UCR)
|Chemistry
|
 
|-valign="top"
|KPP standalone + 3D Interface
|Obin Sturm (USC)
|Chemistry
|
 
|-valign="top"
|NO2+OH+H2O kinetics
|Mat Evans (York)
|Chemistry
|
 
|-valign="top"
|LSODES solver in KPP for faster kinetics
|Haipeng Lin (Harvard)
|Chemistry
|Chemistry
|
|
*Identified as a priority for GC 13, but not yet delivered


|-valign="top"
|-valign="top"
|[https://iopscience.iop.org/article/10.1088/1748-9326/ac16a3 New soil NOx parameterization]
|Load balancing in chemistry solver (GCHP)
|Yi Wang (U. Iowa)<br>Jun Wang (U. Iowa)
|Zhouran Sun (WashU)
|Emissions
|Chemistry +<br>Performance
|
 
|-valign="top"
|Active chemistry in mesosphere for both GCHP and GCClassic
|Helena McDonald (MIT)<br>Sebastian Eastham (ICL)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|[[Grid-independent_emissions|Updated offline sea salt emissions]]
|Updated aromatic oxidation
|Hongjian Weng (PKU)
|Stephen MacFarlane (Wollongong)<br>Jenny Fisher (Wollongong)
|Emissions
|Chemistry
|
|
*Identified as a priority for GC 13, but not yet delivered


|-valign="top"
|-valign="top"
|Provide recommended rather than hard-coded scaling factors for online emissions
|MCO3 uptake by cloud forming MP; leading to lower PAN
|GCST
|Laura Yang (Harvard)
|Emissions
|Chemistry
|
|
*Identified as a priority for GC 13, but not yet developed


|-valign="top"
|-valign="top"
|Add stratospheric ozone species to full-chemistry simulations
|Implement isotope simulation for CH4 in the carbon simulation
|Lee Murray (Rochester)
|Lee Murray (Rochester)
|Chemistry
|Chemistry
|
*Will have to change negative emissions from soil to a first-order loss process
|-valign="top"
|Documentation for adding additional aerosol species
|Connor Barker (UCL)
|Documentation
|
|-valign="top"
|Column diagnostics
|Lizzie Lundgren (Harvard)<br>Viral Shah (GMAO)
|Diagnostics
|
|-valign="top"
|TOMAS rate diagnostics -- improve performance
|Betty Croft (WashU/Dal)
|Diagnostics +<br>Performance
|
|-valign="top"
|Archive gamma values from heterogeneous chemistry
|Bob Yantosca (Harvard)
|Diagnostics
|
|-valign="top"
|RRTMG Documentation
|GCST
|Documentation
|
|-valign="top"
|Canopy Physics Model
|Sam Silva (MIT)
|Dry Deposition
|
*Available at https://zenodo.org/records/3614062#.XzvrH5NKjOR (GEOS-Chem 12.3.0)
|-valign="top"
|Dry deposition diagnostics by land cover
|Holly Nowell (FSU)<br>Chris Holmes (FSU)
|Dry Deposition
|
|-valign="top"
|Dry deposition process diagnostics
|Holly Nowell (FSU)<br>Chris Holmes (FSU)
|Dry Deposition
|
|-valign="top"
|Biomass burning for TOMAS
|Nicole June (CSU)
|Emissions +<br>Microphysics
|
|


|-valign="top"
|-valign="top"
|Diagnostic to archive XCO2, XCO, and XCH4
|Historic biomass burning (1750-2010)
|Dylan Jones (Toronto)
|Pengfei Liu (Georgia Tech)
|Diagnostic
|Emissions
|
|


|-valign="top"
|-valign="top"
|Provide archived TCR-2 GEOS-Chem OH fields for carbon simulations
|Rice methane emissions
|Kazu Miyazaki (JPL)
|Zichong Cheng (Harvard)
|Input data
|Emissions+<br>Carbon simulation
|
|


|-valign="top"
|-valign="top"
|BrC aging
|Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3)
|Xuan Wang (Harvard)<br>Melanie Hammer(Dalhousie)
|Tia Scarpelli (Carbon Mapper)<br>Melissa Sulprizio (Harvard)
|Chemistry
|Emissions
|
|


|-valign="top"
|-valign="top"
|Shared Socioeconomic Pathways Emission Inventories
|New prior CO2 biospheric fluxes from CMS-FLUX and GMAO
|Hong Liao (NUIST)
|Kevin Bowman (JPL)<br>Lesley Ott (GMAO)
|Emissions
|Emissions
|
|
*GMAO can provide high-resolution  fluxes (as high as 12 km)


|-valign="top"
|-valign="top"
|Rediagnosis of RAS convection in GEOS-Chem
|Snowpack Br2 emission
|Tailong He (Toronto)<br>Dylan Jones (Toronto)<br>Andrea Molod (NASA/GMAO)
|Chris Holmes (FSU)
|Convection
|Emissions
|
|
*Work is finished and a manuscript is in preparation.


|-valign="top"
|-valign="top"
|HTAPv3 emissions (0.1 deg, 2002-2018)
|EDGAR v8.1_toxHg emissions for 1970-2022
|Emissions & Deposition WG
|Eric Roy (MIT)
|Emissions
|Emissions
|
|


|-valign="top"
|-valign="top"
|Migrating simple SOA formation from carbon_mod.F90 into the KPP "full-chemistry" mechanism
|Improve pressure handling in GCHP advection
|GCST
|Yuanjian Zhang (WashU)<br>Seb Eastham (ICL)
|Chemistry
|GCHP
|
 
|-valign="top"
|Add error trap for duplicate scale factors in HEMCO
|Bob Yantosca (Harvard)
|HEMCO
|
 
|-valign="top"
|Integration testing: Add stretched grid
|Lizzie Lundgren (Harvard)
|Quality Assurance
|
 
|-valign="top"
|Integration testing: Add GCHP mass flux run
|Lizzie Lundgren (Harvard)
|Quality Assurance
|
 
|-valign="top"
|Integration testing: Reinstate TOMAS40
|Betty Croft (Dalhousie/WashU)
|Quality Assurance
|
 
|-valign="top"
|Continue cleanup of C-preprocessor switches
|Lizzie Lundgren (Harvard)
|Structural
|
 
|-valign="top"
|Updates to Luo deposition scheme
|Gan Luo (Albany)
|Wet Deposition
|
|
*New version, keep as switch (not default)


|-valign="top"
|-valign="top"
|Updated parameterization of aerosol size distribution for bulk aerosol simulations
|Testing the use of a new scavenging parameterization developed by Luo and Yu for cold cloud with Pb-210 aerosol tracer
|Haihui Zhu (WashU)<br>Shixian Zhai (Harvard)
|Gan Luo (Albany)<br>Fangqun Yu (Albany)
|Aerosols
|Wet Deposition
|
|


Line 345: Line 569:


|-valign="top"
|-valign="top"
|Methylethylketone chemistry
|ML algorithms for bulk aerosol
|Jared Brewer (CSU)
|Arshad Nair (Albany)<br>Fangqun Yu (Albany)
|Aerosols
|
 
|-valign="top"
|Heterogeneous sulfate chemistry
|Katie Travis (NASA)
|Chemistry
|
 
|-valign="top"
|H2 as an active species
|Seb Eastham (ICL)
|Chemistry
|
 
|-valign="top"
|HCN, acetonitrile as fire tracers
|Kevin Bates (CU Boulder)
|Chemistry
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Add sulfate dependence to SOA yield from isoprene in simple SOA
|Implement ethane in carbon simulation
|Eloise Marais (UCL)
|Yuzhong Zhang (Westlake)
|Chemistry
|Chemistry
|
|


|-valign="top"
|-valign="top"
|GTMM updates
|Mesospheric source of CO
|Ben Geyman (Harvard)
|Dylan Jones (UofT)<br>Pam Wales (NASA GSFC)
|Emissions
|
 
|-valign="top"
|Drought-stress algorithm
|Wei Li (Houston)
|Emissions
|
 
|-valign="top"
|Physically-based resolution correction for BVOC emissions using MEGAN
|May Fu (SUSTech)
|Emissions
|
 
|-valign="top"
|Canadian forest fire prediction system (Canada government forecast model)
|Robin Stevens (Montreal)
|Emissions
|
 
|-valign="top"
|Cooking emissions (not biofuel)
|Kelvin Bates (CU Boulder)
|Emissions
|
 
|-valign="top"
|State-specific annual emissions scaling factors (US) (1990-2021)
|Ishir Dutta (MIT)
|Emissions
|
 
|-valign="top"
|GISS-GC online
|Lee Murray (Rochester)
|External model
|
 
|-valign="top"
|Hybrid MPI-OpenMP in GCHP
|Seb Eastham (MIT)<br>Killian Murphy (York)<br>Lizzie Lundgren (Harvard)
|GCHP
|
 
|-valign="top"
|MAPL3: Update to MAPL3 in GCHP, including replacement of ExtData.rc and HISTORY.rc with YAML files
|Lizzie Lundgren (Harvard)
|GCHP
|
 
|-valign="top"
|MAPL3: Comply with MAPL "positive" standard in GCHP diagnostic files
|Lizzie Lundgren (Harvard)
|GCHP
|
 
|-valign="top"
|MAPL3: Wildcards in GCHP History
|Lizzie Lundgren (Harvard)
|GCHP
|
 
|-valign="top"
|MAPL3: Output emissions with positive up convention in GCHP
|Lizzie Lundgren (Harvard)
|GCHP
|
 
|-valign="top"
|Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone
|Bob Yantosca (Harvard)
|Performance
|
 
|-valign="top"
|Photophysical oxidation of aldehydes
|Paulo Sebastianelli (Wollongong)<br>Jenny Fisher (Wollongong)
|Chemistry
|
 
|-valign="top"
|DMS updates
|Will Porter (UCR)
|Chemistry
|
 
|-valign="top"
|Furans emission and chemistry
|Lixu Jin (Montana)<br>Lu Hu (Montana)
|Chemistry + <br>Emissions
|
 
|-valign="top"
|Cl2 prodcution from Fe aerosol
|Qianjie Chen (HK Poly)<br>Becky Alexander (UW)
|Chemistry
|
 
|-valign="top"
|VCP emissions
|Kevin Bates (CU Boulder)
|Emissions
|
 
|-valign="top"
|Bidirectional land-atmosphere exchange for Hg
|Yuying Cui (MIT/Tsinghua)
|Hg simulation
|Hg simulation
|
|


|-valign="top"
|OH covariances for inversions
|Elise Penn (Harvard)
|Inversions
|


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/GCHP/issues/19 Integrating GMAO's tracer gridded component in GCHP]
|CESM2-GC offline
|Christoph Keller (NASA GMAO)
|Seb Eastham (ICL)<br>Lee Murray (Rochester)
|Transport Tracer simulation
|Met fields
|
|


|-valign="top"
|-valign="top"
|Streamlining of specialty simulations through HEMCO and KPP
|Re-binning of off-line sea salt and dust for TOMAS
|Betty Croft (Dalhousie)
|Microphysics
|
 
|-valign="top"
|TOMAS nucleation updates
|Sam O'Donnell (CSU)
|Microphysics
|
 
|-valign="top"
|Stratospheric aerosol APM
|Fangqun Yu (SUNY Albany)
|Microphysics
|
 
|-valign="top"
|Transition from MERRA-2 to GEOS-IT for benchmarking
|Yuanjian Zhang (WashU)
|Quality Assurance
|
 
|-valign="top"
|Automate integration testing on AWS
|Yidan Tang (WashU)
|Quality Assurance
|
 
|-valign="top"
|Integration testing: Add across end of year run
|GCST
|GCST
|Chemistry, Specialty simulations
|Quality Assurance
|
 
|-valign="top"
|Integration testing: Add GEOS-IT
|Yuanjian Zhang (WashU)
|Quality Assurance
|
 
|-valign="top"
|Separate mixing, emissions, and drydep
|Yuanjian Zhang (WashU)
|Structural
|
 
|-valign="top"
|Intel IFX compiler
|Bob Yantosca (Harvard)
|Structural
|
 
|-valign="top"
|CMake option to only build libraries but not executable, also passing C-preprocessor statements to turn off code
|Bob Yantosca (Harvard)<br>Lee Murray (Rochester)
|Structural
|
 
|-valign="top"
|Remove differences introduced when breaking up GC-Classic runs in time; and flexible precision in HEMCO
|Lizzie Lundgren (Harvard)
|Structural
|
 
|-valign="top"
|Limit allocation of State_Met to what is needed per simulation
|Melissa Sulprizio (Harvard)
|Structural
|
 
|-valign="top"
|Using 3-D precipitation fluxes to calculate precipitation formation and re-evaporation in scavenging (to be consistent with GEOS/GOCART & ground precipitation)
|Gan Luo (Albany)<br>Hongyu Liu (NIA/LaRC)<br>Bo Zhang (NIA/LaRC)
|Wet deposition
|
|


Line 380: Line 807:


Features listed in this table are in development and will likely be delivered to the GEOS-Chem Support Team in the 12-24 months timeframe.
Features listed in this table are in development and will likely be delivered to the GEOS-Chem Support Team in the 12-24 months timeframe.
{| border=1 cellspacing=0 cellpadding=5
{| border=1 cellspacing=0 cellpadding=5
|- bgcolor="#cccccc"
|- bgcolor="#cccccc"
Line 388: Line 816:


|-valign="top"
|-valign="top"
|Implement isotope simulation for CO and CH4 in GCHP
|Modal aerosol model (MAM7) in GCHP
|Lee Murray (Rochester)
|Shreya Sharma (MIT)
|Specialty simulation
|Aerosols
|
|


|-valign="top"
|-valign="top"
|Migrate LETFK DA scheme to GCHP
|Online OCIM ocean biogeochemistry
|Kazu Miyazaki (JPL)
|Lee Murray (Rochester)<br>Hannah Horowitz (UIUC)<br>Chris Holmes (FSU)
|Structural
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Super fast chemistry scheme
|Perchlorate chemistry
|Benjamin Brown-Steiner (AER)<br>Makoto Kelp (Harvard)
|Yuk Chun Chan (UW)
|Chemistry
|Chemistry
|
|
*SF mechanism has been implemented and benchmarked in GEOS-Chem 12.0.0. This mechanism is of interest for those groups wanting fast global simulation of oxidation fields in GEOS-Chem simulations focused on aerosol microphysics.
*The machine-learned chemical solver is still probably 12 months away from online implementation into GEOS-Chem.


|-valign="top"
|-valign="top"
|Add non-volatile cations to ISORROPIA
|Non-stomatal dry deposition (2-layer canopy model)
|Becky Alexander (UW)
|Michael Vermeuel (Purdue)
|Aerosols
|Dry Deposition
|
 
|-valign="top"
|Continental chloride particle emissions (salty dust, road salt)
|Jessica Haskins (Utah)
|Emissions
|
 
|-valign="top"
|Multivolatility emission inventory to address gaps in EDGAR/HTAP etc.
|Ruochong (Tshingua)
|Emissions
|
 
|-valign="top"
|Lightning NOx production rates
|Bex Horner (UCL)
|Emissions
|
 
|-valign="top"
|HFO and CF3CHO
|Beth Killen (Wollongong)<br>Jenny Fisher (Wollongong)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|DMS oxidation scheme updating
|Glyoxal updates from isoprene
|Becky Alexander (UW)<br>Qianjie Chen (UW)
|Tzung-May Fu (SUSTech)
|Chemistry
|Chemistry
|
|
*Delayed - implemented pre-KPP
*Currently bring implemented in KPP by UC Riverside group


|-valign="top"
|-valign="top"
|Heterogeneous sulfate production
|Iodine chemistry
|Lin Zhang (PKU)<br>Becky Alexander (UW)<br>Yuxuan Wang (U. Houston)
|Becky Alexander (UW)<br>Xuan Wang (CUHK)
|Chemistry
|Chemistry
|
|
*Delayed - implemented pre-KPP


|-valign="top"
|-valign="top"
|Hg in WRF-GC
|GFED5 biomass burning
|Yanxu Zhang (Nanjing)
|Eric Roy (MIT)
|Emissions
|
 
|-valign="top"
|Ocean Hg surface concentrations for 2010-2020 from multi-model ensemble
|Eric Roy (MIT)<br>Ari Feinberg (IQF-CSIC)
|Hg simulation
|
 
|-valign="top"
|Soil Hg emissions 2010-2020
|Eric Roy (MIT)<br>Ari Feinberg (IQF-CSIC)
|Hg simulation
|
 
|-valign="top"
|Air-sea exchange parameterization
|Eric Roy (MIT)
|Hg simulation
|
 
|-valign="top"
|Soil Hg emissions parameterization
|Ari Feinberg (IQF-CSIC)
|Hg simulation
|
 
|-valign="top"
|Sea salt uptake of GOM
|Eric Roy (MIT)
|Hg simulation
|
 
|-valign="top"
|Photoreduction rate constant
|Eric Roy (MIT)
|Hg simulation
|
 
|-valign="top"
|New observations (2010-2020) in standardized Hg benchmark for intercomparison
|Eric Roy (MIT)/Ari Feinberg (IQF-CSIC)
|Hg simulation
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Hg with blowing snow
|Hg simulation in GCHP
|Yanxu Xhang (Nanjing)
|Eric Roy (MIT)
|Emissions, Hg simulation
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Hg isotopes
|OCIM - biogeochemical model - (C/P/N/Fe - no Hg yet) (MATLAB)
|Xiaotian Xu, Yanxu Xhang (Nanjing)
|Hannah Horowitz (UIUC)
|Hg simulation
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Hg in CESM CAM-CHEM
|Possibly updating Hg oxidation chemistry based on Utah field campaigns
|Peng Zhang, Yanxu Xhang (Nanjing)
|Jessica Haskins (Utah)
|Hg simulation
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Complex / multicomplex variables
|New halogen/aerosol fields (surface area / AOD) from 10-year 14.4 benchmark simulation available online
|Shannon Capps (Drexel)
|Viral Shah (NASA GMAO); Eric Roy (MIT); Ari Feinberg (IQF-CSIC)
|Input data
|
 
|-valign="top"
|Extend IMI to CO2 (ICI)
|Hannah Nesser (JPL)
|Inversions
|
 
|-valign="top"
|Global emission inventory of metals
|Tzung-May Fu (SUSTech); He Zhong Tian (Peking Normal U)
|Metals simulation
|
 
|-valign="top"
|Investigate and improve performance of aerosol chemistry
|Bob Yantosca (Harvard)
|Performance
|
 
|-valign="top"
|PAH - update from version 11
|Lexia Cicone (MIT)
|POPs simulation
|
 
|-valign="top"
|Species database more accessible; doc updates; TOL discussion
|Jessica Haskins (Utah)
|Structural
|Structural
|
|


|}
|-valign="top"
|Stretched-grid plotting in GCPy
|Killian Murphy (York)
|Tools
|
 
|-valign="top"
|Model inter-comparison of transport (GEOS, GCHP, GCClassic)
|Lizzie Lundgren (Harvard), Emma Knowland (NASA)
|Transport
|


----------------
|-valign="top"
|Comparing mass fluxes in GCHP vs. traditional lat/lon wind
|Yuanjian Zhang (WashU), Seb Eastham (ICL)
|Transport
|


'''''[[Main_Page|GEOS-Chem Main Page]] | [[GCHP_Main_Page|GCHP Main Page]]'''''
|}

Latest revision as of 15:23, 20 November 2024

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. For history of past releases see the GEOS-Chem Versions wiki page.

Merged and awaiting release

See the links below for items merged and awaiting release.

Mergeable at any time Version in development
GEOS-Chem no-diff-to-benchmark GEOS-Chem 14.6.0

Feature integration in progress

Features listed in this table are actively being integrated into GEOS-Chem by the GEOS-Chem Support Team. In addition, we continuously implement structural updates in the model to maintain and develop coupling with other models including GEOS, CESM, and the model adjoint.

Feature Contributor(s) Model scope Ease of implementation Notes and References
New version of CEDS at 0.1 deg Dandan Zhang (WashU) Emissions Simple
Use USTAR read from GEOS instead of calculating from U10M and V10M Yuanjian Zhang (WashU) Emissions Simple
  • HEMCO PR #279
  • NOTE: WashU will recompute mass tuning factors for each met field & resolution (GCClassic)
Carbon simulation fixes in GCClassic and GCHP Melissa Sulprizio (Harvard)
Lizzie Lundgren (Harvard) 		Carbon simulation Medium
Investigate potential performance gains of replacing the KPP Rosenbrock solver with the LSODE solver Bob Yantosca (Harvard) Chemistry Medium
Fix obspack - not working in 14.4.0 Bob Yantosca (Harvard) Diagnostics Medium
Make GC-Classic bit-for-bit reproducible upon restart
(part 1 of 2) 		Lizzie Lundgren (Harvard) GC-Classic Medium
Capture all trop and PBL height changes in budget diagnostics Chris Holmes (FSU)
Lizzie Lundgren (Harvard) 		Diagnostics Medium
Derive convective precipitation flux if using FP/IT generated with Grell-Freitas Yuanjian Zhang (WashU)
Viral Shah (GMAO)
Lizzie Lundgren (Harvard) 		Convection Medium
GCHP mass flux fixes Yuanjian Zhang (WashU) GCHP Simple
HEMCO log print updates Lizzie Lundgren (Harvard) ESMs Medium
Fix yaml reader bug with certain compilers Lizzie Lundgren (Harvard) Build Simple

Prioritized and in the queue

Features listed in this table are prioritized for integration into GEOS-Chem in the near future.

Feature Contributor(s) Model scope Ease of implementation Delivery status Notes and References
Retire CH4, CO2, tagCO simulations in favor of carbon simulation Melissa Sulprizio (Harvard) Carbon gases Simple
Correct the issue that injection height has been artificially decreased by HEMCO Lixu Jun (Montana) Emissions Simple Delivered
June 2024
Capability to run GCClassic at 0.125x0.15625 resolution Melissa Sulprizio (Harvard)
Xiaolin Wang (Harvard) 		Nested grid Simple Delivered
Strat-adjusted RF in GCC and GCHP Connor Barker (UCL)
Eloise Marais (UCL) 		Radiation Simple Delivered
Archived TCR-2 OH fields for carbon simulations Kazu Miyazaki (JPL)
Melissa Sulprizio (Harvard) 		Input data Simple Data delivered
Oct 2024
  • This will be the default OH, but users will have the option of selecting other OH fields
  • geos-chem issue #2537
Dust non-sphericity impacts on optical properties Inderjeet Singh (WashU) Aerosols Medium Not yet delivered

Ready to go in

Features listed in this table are ready to go in but have either not been delivered or are not yet prioritized for integration into GEOS-Chem.

Feature Contributor(s) Model scope Delivery status Notes and Refereneces


Binary Activity Thermodynamic (BAT) model for non-ideal mixing of water and organics in organic aerosol Camilo Serrano (McGill)
Andreas Zuend (McGill) 		Aerosols Not delivered
Update UCX to include gravitational settling of aerosol species beyond just BCPI Conor Barker (UCL)
Eloise Marais (UCL) 		Aerosols Not delivered
Seasalt aerosol from sea ice leads (2002-2011) Hannah Horrowitz (UIUC) Aerosols Not delivered
  • Offline and online, ready to go in HEMCO (optional in addition to existing seasalt emissions)
Global organic N dep from various emissions; nitrate aromatics updates May Fu (SUSTech) Chemistry +
Deposition 		Not delivered
Dry deposition to F90 to improve readability Chris Holmes (FSU) Dry Deposition Not delivered
Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange Joey Lam (CUHK)
Amos Tai (CUHK) 		Dry deposition Delivered
Feb 2021
FRP-based fire emissions for eastern US at 0.2 (2019-2020) Chris Holmes (FSU) Emissions Not delivered
China agriculture NH3 emissions Amos Tai (CUHK) Emissions Not delivered
T-dependent anthropogenic VOCs May Fu (SUSTech) Emissions Not delivered
  • Option. Requires processing existing anthropogenic VOC emissions to generate offline emissions to read in. Parameterised for China.
New source functions for transport tracers beryllium-7 and beryllium-10 Minjie Zheng (ETH) Emissions Delivered
June 2024
LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100 Yang Li (Baylor U)
Loretta Mickley (Harvard) 		Emissions Delivered
  • Data involves many files- need to think about temporal frequency
Australian Hg emissions (2000-2019) Stephen MacFarlane (Wollongong)
Jenny Fisher (Wollongong) 		Emissions Not delivered
  • MacFarlane et al. (2024)
  • Includes emissions from black and brown coal power plants, various metal production/processing sources (Aluminium, gold, copper, lead, etc), waste products, cement production, oil refining and petroleum, chlor alkali plants, and cremation
Hg geogenic emissions (volcanic, rock weathering) Eric Roy (MIT) Emissions Not delivered
Hg biomass burning - FINN2.5 & GFED4 Eric Roy (MIT) Emissions Not delivered
BCC-GC online Lin Zhang (PKU) External Model Not delivered
GC-YIBS with online fire emissions Xu Yue (NUIST)
Hong Liao (NUIST) 		External Model Not delivered
GISS-GC offline (GCAP) Lee Murray (Rochester) GCAP Not delivered

Almost there (< 6 months)

Features listed in this table are in development and will likely be delivered to the GEOS-Chem Support Team within the next 6 months.

Feature Contributor(s) Model scope Notes and References
Fixes to stratospheric aerosol settling Connor Barker (UCL)
Eloise Marais (UCL) 		Aerosols
DMS chemistry in v14 Linia Tashmim (UCR)
Will Porter (UCR) 		Chemistry
KPP standalone + 3D Interface Obin Sturm (USC) Chemistry
NO2+OH+H2O kinetics Mat Evans (York) Chemistry
LSODES solver in KPP for faster kinetics Haipeng Lin (Harvard) Chemistry
Load balancing in chemistry solver (GCHP) Zhouran Sun (WashU) Chemistry +
Performance
Active chemistry in mesosphere for both GCHP and GCClassic Helena McDonald (MIT)
Sebastian Eastham (ICL) 		Chemistry
Updated aromatic oxidation Stephen MacFarlane (Wollongong)
Jenny Fisher (Wollongong) 		Chemistry
MCO3 uptake by cloud forming MP; leading to lower PAN Laura Yang (Harvard) Chemistry
Implement isotope simulation for CH4 in the carbon simulation Lee Murray (Rochester) Chemistry
  • Will have to change negative emissions from soil to a first-order loss process
Documentation for adding additional aerosol species Connor Barker (UCL) Documentation
Column diagnostics Lizzie Lundgren (Harvard)
Viral Shah (GMAO) 		Diagnostics
TOMAS rate diagnostics -- improve performance Betty Croft (WashU/Dal) Diagnostics +
Performance
Archive gamma values from heterogeneous chemistry Bob Yantosca (Harvard) Diagnostics
RRTMG Documentation GCST Documentation
Canopy Physics Model Sam Silva (MIT) Dry Deposition
Dry deposition diagnostics by land cover Holly Nowell (FSU)
Chris Holmes (FSU) 		Dry Deposition
Dry deposition process diagnostics Holly Nowell (FSU)
Chris Holmes (FSU) 		Dry Deposition
Biomass burning for TOMAS Nicole June (CSU) Emissions +
Microphysics
Historic biomass burning (1750-2010) Pengfei Liu (Georgia Tech) Emissions
Rice methane emissions Zichong Cheng (Harvard) Emissions+
Carbon simulation
Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3) Tia Scarpelli (Carbon Mapper)
Melissa Sulprizio (Harvard) 		Emissions
New prior CO2 biospheric fluxes from CMS-FLUX and GMAO Kevin Bowman (JPL)
Lesley Ott (GMAO) 		Emissions
  • GMAO can provide high-resolution fluxes (as high as 12 km)
Snowpack Br2 emission Chris Holmes (FSU) Emissions
EDGAR v8.1_toxHg emissions for 1970-2022 Eric Roy (MIT) Emissions
Improve pressure handling in GCHP advection Yuanjian Zhang (WashU)
Seb Eastham (ICL) 		GCHP
Add error trap for duplicate scale factors in HEMCO Bob Yantosca (Harvard) HEMCO
Integration testing: Add stretched grid Lizzie Lundgren (Harvard) Quality Assurance
Integration testing: Add GCHP mass flux run Lizzie Lundgren (Harvard) Quality Assurance
Integration testing: Reinstate TOMAS40 Betty Croft (Dalhousie/WashU) Quality Assurance
Continue cleanup of C-preprocessor switches Lizzie Lundgren (Harvard) Structural
Updates to Luo deposition scheme Gan Luo (Albany) Wet Deposition
  • New version, keep as switch (not default)
Testing the use of a new scavenging parameterization developed by Luo and Yu for cold cloud with Pb-210 aerosol tracer Gan Luo (Albany)
Fangqun Yu (Albany) 		Wet Deposition

Over the horizon (6-12 months)

Features listed in this table are in development and will likely be delivered to the GEOS-Chem Support Team in the 6-12 months timeframe.

Feature Contributor(s) Model scope Notes and References
ML algorithms for bulk aerosol Arshad Nair (Albany)
Fangqun Yu (Albany) 		Aerosols
Heterogeneous sulfate chemistry Katie Travis (NASA) Chemistry
H2 as an active species Seb Eastham (ICL) Chemistry
HCN, acetonitrile as fire tracers Kevin Bates (CU Boulder) Chemistry
Implement ethane in carbon simulation Yuzhong Zhang (Westlake) Chemistry
Mesospheric source of CO Dylan Jones (UofT)
Pam Wales (NASA GSFC) 		Emissions
Drought-stress algorithm Wei Li (Houston) Emissions
Physically-based resolution correction for BVOC emissions using MEGAN May Fu (SUSTech) Emissions
Canadian forest fire prediction system (Canada government forecast model) Robin Stevens (Montreal) Emissions
Cooking emissions (not biofuel) Kelvin Bates (CU Boulder) Emissions
State-specific annual emissions scaling factors (US) (1990-2021) Ishir Dutta (MIT) Emissions
GISS-GC online Lee Murray (Rochester) External model
Hybrid MPI-OpenMP in GCHP Seb Eastham (MIT)
Killian Murphy (York)
Lizzie Lundgren (Harvard) 		GCHP
MAPL3: Update to MAPL3 in GCHP, including replacement of ExtData.rc and HISTORY.rc with YAML files Lizzie Lundgren (Harvard) GCHP
MAPL3: Comply with MAPL "positive" standard in GCHP diagnostic files Lizzie Lundgren (Harvard) GCHP
MAPL3: Wildcards in GCHP History Lizzie Lundgren (Harvard) GCHP
MAPL3: Output emissions with positive up convention in GCHP Lizzie Lundgren (Harvard) GCHP
Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone Bob Yantosca (Harvard) Performance
Photophysical oxidation of aldehydes Paulo Sebastianelli (Wollongong)
Jenny Fisher (Wollongong) 		Chemistry
DMS updates Will Porter (UCR) Chemistry
Furans emission and chemistry Lixu Jin (Montana)
Lu Hu (Montana) 		Chemistry +
Emissions
Cl2 prodcution from Fe aerosol Qianjie Chen (HK Poly)
Becky Alexander (UW) 		Chemistry
VCP emissions Kevin Bates (CU Boulder) Emissions
Bidirectional land-atmosphere exchange for Hg Yuying Cui (MIT/Tsinghua) Hg simulation
OH covariances for inversions Elise Penn (Harvard) Inversions
CESM2-GC offline Seb Eastham (ICL)
Lee Murray (Rochester) 		Met fields
Re-binning of off-line sea salt and dust for TOMAS Betty Croft (Dalhousie) Microphysics
TOMAS nucleation updates Sam O'Donnell (CSU) Microphysics
Stratospheric aerosol APM Fangqun Yu (SUNY Albany) Microphysics
Transition from MERRA-2 to GEOS-IT for benchmarking Yuanjian Zhang (WashU) Quality Assurance
Automate integration testing on AWS Yidan Tang (WashU) Quality Assurance
Integration testing: Add across end of year run GCST Quality Assurance
Integration testing: Add GEOS-IT Yuanjian Zhang (WashU) Quality Assurance
Separate mixing, emissions, and drydep Yuanjian Zhang (WashU) Structural
Intel IFX compiler Bob Yantosca (Harvard) Structural
CMake option to only build libraries but not executable, also passing C-preprocessor statements to turn off code Bob Yantosca (Harvard)
Lee Murray (Rochester) 		Structural
Remove differences introduced when breaking up GC-Classic runs in time; and flexible precision in HEMCO Lizzie Lundgren (Harvard) Structural
Limit allocation of State_Met to what is needed per simulation Melissa Sulprizio (Harvard) Structural
Using 3-D precipitation fluxes to calculate precipitation formation and re-evaporation in scavenging (to be consistent with GEOS/GOCART & ground precipitation) Gan Luo (Albany)
Hongyu Liu (NIA/LaRC)
Bo Zhang (NIA/LaRC) 		Wet deposition

Longer term (12-24 months)

Features listed in this table are in development and will likely be delivered to the GEOS-Chem Support Team in the 12-24 months timeframe.

Feature Contributor(s) Model scope Notes and References
Modal aerosol model (MAM7) in GCHP Shreya Sharma (MIT) Aerosols
Online OCIM ocean biogeochemistry Lee Murray (Rochester)
Hannah Horowitz (UIUC)
Chris Holmes (FSU) 		Chemistry
Perchlorate chemistry Yuk Chun Chan (UW) Chemistry
Non-stomatal dry deposition (2-layer canopy model) Michael Vermeuel (Purdue) Dry Deposition
Continental chloride particle emissions (salty dust, road salt) Jessica Haskins (Utah) Emissions
Multivolatility emission inventory to address gaps in EDGAR/HTAP etc. Ruochong (Tshingua) Emissions
Lightning NOx production rates Bex Horner (UCL) Emissions
HFO and CF3CHO Beth Killen (Wollongong)
Jenny Fisher (Wollongong) 		Chemistry
Glyoxal updates from isoprene Tzung-May Fu (SUSTech) Chemistry
Iodine chemistry Becky Alexander (UW)
Xuan Wang (CUHK) 		Chemistry
GFED5 biomass burning Eric Roy (MIT) Emissions
Ocean Hg surface concentrations for 2010-2020 from multi-model ensemble Eric Roy (MIT)
Ari Feinberg (IQF-CSIC) 		Hg simulation
Soil Hg emissions 2010-2020 Eric Roy (MIT)
Ari Feinberg (IQF-CSIC) 		Hg simulation
Air-sea exchange parameterization Eric Roy (MIT) Hg simulation
Soil Hg emissions parameterization Ari Feinberg (IQF-CSIC) Hg simulation
Sea salt uptake of GOM Eric Roy (MIT) Hg simulation
Photoreduction rate constant Eric Roy (MIT) Hg simulation
New observations (2010-2020) in standardized Hg benchmark for intercomparison Eric Roy (MIT)/Ari Feinberg (IQF-CSIC) Hg simulation
Hg simulation in GCHP Eric Roy (MIT) Hg simulation
OCIM - biogeochemical model - (C/P/N/Fe - no Hg yet) (MATLAB) Hannah Horowitz (UIUC) Hg simulation
Possibly updating Hg oxidation chemistry based on Utah field campaigns Jessica Haskins (Utah) Hg simulation
New halogen/aerosol fields (surface area / AOD) from 10-year 14.4 benchmark simulation available online Viral Shah (NASA GMAO); Eric Roy (MIT); Ari Feinberg (IQF-CSIC) Input data
Extend IMI to CO2 (ICI) Hannah Nesser (JPL) Inversions
Global emission inventory of metals Tzung-May Fu (SUSTech); He Zhong Tian (Peking Normal U) Metals simulation
Investigate and improve performance of aerosol chemistry Bob Yantosca (Harvard) Performance
PAH - update from version 11 Lexia Cicone (MIT) POPs simulation
Species database more accessible; doc updates; TOL discussion Jessica Haskins (Utah) Structural
Stretched-grid plotting in GCPy Killian Murphy (York) Tools
Model inter-comparison of transport (GEOS, GCHP, GCClassic) Lizzie Lundgren (Harvard), Emma Knowland (NASA) Transport
Comparing mass fluxes in GCHP vs. traditional lat/lon wind Yuanjian Zhang (WashU), Seb Eastham (ICL) Transport
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