GEOS-Chem model development priorities: Difference between revisions

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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 [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 [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''']].


== Merged and awaiting release ==
== Merged and awaiting release ==
Line 12: Line 12:
|-valign="top"
|-valign="top"
|align="center"|'''[[GEOS-Chem no-diff-to-benchmark]]'''
|align="center"|'''[[GEOS-Chem no-diff-to-benchmark]]'''
|align="center"|'''[[GEOS-Chem 14.5.0]]'''
|align="center"|'''[[GEOS-Chem 14.6.0]]'''


|}
|}
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|-valign="top"
|-valign="top"
|ALK4 & R4N2 chemistry
|New version of CEDS at 0.1 deg
|Jared Brewer (UMN)
|Dandan Zhang (WashU)
|Chemistry
|Emissions
|Simple
|Simple
|
|
*[https://github.com/geoschem/geos-chem/pull/2352 geos-chem PR #1625]
*[https://github.com/geoschem/geos-chem/pull/2171 geos-chem PR #2171]
*[https://acmg.seas.harvard.edu/files/acmg/files/brewer2022.pdf Brewer, J.F. et al., J. Geophys. Res., 2023.]


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/1288 New soil NOx parameterization]
|Use USTAR read from GEOS instead of calculating from U10M and V10M
|Yi Wang (Iowa)<br>Jun Wang (Iowa)
|Yuanjian Zhang (WashU)
|Emissions
|Emissions
|Simple
|
*[https://github.com/geoschem/HEMCO/pull/279 HEMCO PR #279]
*NOTE: WashU will recompute mass tuning factors for each met field & resolution (GCClassic)
|-valign="top"
|Carbon simulation fixes in GCClassic and GCHP
|Melissa Sulprizio (Harvard)<br>Lizzie Lundgren (Harvard)
|Carbon simulation
|Medium
|Medium
|
|
*[https://github.com/geoschem/geos-chem/issues/1288 geos-chem issue #1288]
*[https://github.com/geoschem/GCHP/issues/440 GCHP issue #440]
*Incorporates new met field TSOIL1
*[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"
|Fix pressure handling in HEMCO standalone
|Investigate potential performance gains of replacing the KPP Rosenbrock solver with the LSODE solver
|Melissa Sulprizio (Harvard)
|Bob Yantosca (Harvard)
|HEMCO
|Chemistry
|Medium
|
|
*[https://github.com/geoschem/geos-chem/pull/2482 geos-chem PR #2482]
*[https://github.com/geoschem/geos-chem/pull/2483 geos-chem PR #2483]


|-valign="top"
|-valign="top"
|Horizontal flux regridding fix in MAPL
|Fix obspack - not working in 14.4.0
|Tom Clune (GMAO)
|Bob Yantosca (Harvard)
|GCHP
|Diagnostics
|Medium
|Medium
|
|
*[https://github.com/geoschem/MAPL/pull/36 MAPL PR #36]
*[https://github.com/geoschem/geos-chem/issues/2328 geos-chem issue #2328]


|-valign="top"
|-valign="top"
|Cloud-J 7.7.2 for greater flexibility in external models
|Make GC-Classic bit-for-bit reproducible upon restart<br>(part 1 of 2)
|Lizzie Lundgren (Harvard)
|Lizzie Lundgren (Harvard)
|Photolysis
|GC-Classic
|Medium
|Medium
|
|
*[https://github.com/geoschem/Cloud-J/pull/17 Cloud-J PR #17]
*[https://github.com/geoschem/geos-chem/pull/2521 geos-chem PR #2521]
*[https://github.com/geoschem/geos-chem/pull/2342 geos-chem PR #2342]
* More Cloud-J PRs in progress


|-valign="top"
|-valign="top"
|GCHP run directory improvements for mass flux, stretched grid, and GEOS-IT runs
|Capture all trop and PBL height changes in budget diagnostics
|Chris Holmes (FSU)<br>Lizzie Lundgren (Harvard)
|Diagnostics
|Medium
|
*[https://github.com/geoschem/geos-chem/pull/2103 geos-chem PR 2103]
 
|-valign="top"
|Derive convective precipitation flux if using FP/IT generated with Grell-Freitas
|Yuanjian Zhang (WashU)<br>Viral Shah (GMAO)<br>Lizzie Lundgren (Harvard)
|Convection
|Medium
|
*[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"
|GCHP mass flux fixes
|Yuanjian Zhang (WashU)
|GCHP
|Simple
|
*[https://github.com/geoschem/GCHP/pull/456 GCHP PR 456]
 
|-valign="top"
|HEMCO log print updates
|Lizzie Lundgren (Harvard)
|Lizzie Lundgren (Harvard)
|GCHP
|ESMs
|Medium
|Medium
|
|
*[https://github.com/geoschem/geos-chem/pull/2326 geos-chem PR #2326]
*[https://github.com/geoschem/HEMCO/pull/296 HEMCO PR 296]


|-valign="top"
|-valign="top"
|Fixes for GEOS-Chem 14.4 in CESM
|Fix yaml reader bug with certain compilers
|Haipeng Lin (Harvard)<br>Lizzie Lundgren (Harvard)
|Lizzie Lundgren (Harvard)
|CESM
|Build
|Medium
|Simple
|
|
*[https://github.com/geoschem/geos-chem/pull/2348 geos-chem PR #2348]
*[https://github.com/geoschem/geos-chem/pull/2486 geos-chem PR 2486]
*[https://github.com/geoschem/geos-chem/pull/2349 geos-chem PR #2349]
* More PRs in progress


|}
|}
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|-valign="top"
|-valign="top"
|New version of CEDS at 0.1 deg
|Retire CH4, CO2, tagCO simulations in favor of carbon simulation
|Dandan Zhang (WashU)
|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
|Emissions
|Simple
|Simple
|Delivered June 2024
|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"
|Capability to run GCClassic at 0.125x0.15625 resolution
|Melissa Sulprizio (Harvard)<br>Xiaolin Wang (Harvard)
|Nested grid
|Simple
|Delivered
|
*[https://github.com/geoschem/geos-chem/pull/1980 geos-chem PR #1980]
*[https://github.com/geoschem/HEMCO/pull/290 HEMCO PR #290]
 
|-valign="top"
|Strat-adjusted RF in GCC and GCHP
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|Radiation
|Simple
|Delivered
|
*[https://github.com/geoschem/geos-chem/pull/2525 geos-chem PR #2525]
 
|-valign="top"
|Archived TCR-2 OH fields for carbon simulations
|Kazu Miyazaki (JPL)<br>Melissa Sulprizio (Harvard)
|Input data
|Simple
|Data delivered<br>Oct 2024
|
|
*[https://github.com/geoschem/geos-chem/issues/1745 geos-chem issue #1745]
*This will be the default OH, but users will have the option of selecting other OH fields
*[https://github.com/geoschem/geos-chem/issues/2537 geos-chem issue #2537]


|-valign="top"
|-valign="top"
|Remove differences in GC-Classic due to HEMCO reading REAL8 restart as REAL4
|Dust non-sphericity impacts on optical properties
|Lizzie Lundgren (Harvard)
|Inderjeet Singh (WashU)
|GC-Classic
|Aerosols
|Medium
|Medium
|Not yet delivered
|
|
|
*[https://github.com/geoschem/HEMCO/issues/18 HEMCO issue #18]


|}
|}
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|Not delivered
|Not delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/2392 geos-chem issue #2392]


|-valign="top"
|-valign="top"
|Extend aerosol settling
|Update UCX to include gravitational settling of aerosol species beyond just BCPI
|Eloise Marais (UCL)
|Conor Barker (UCL)<br>Eloise Marais (UCL)
|Aerosols
|Not delivered
|
 
|-valign="top"
|Comment back in Ca, Mg, and K cations in aerosol thermo (HETP)
|Becky Alexander (UW)
|Aerosols
|Aerosols
|Not delivered
|Not delivered
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|-valign="top"
|-valign="top"
|P/L species should not contribute to the error norm
|Global organic N dep from various emissions; nitrate aromatics updates
|Obin Sturm (USC)
|Chemistry
|Not delivered
|
 
|-valign="top"
|Additional 6 peroxynitrates (many PANs like species); improve ALK4 & add ALK6
|Katie Travis (NASA LARC)
|Chemistry
|Not delivered
|
 
|-valign="top"
|Monoterpene oxidation more species & oxidation products
|Kevin Bates (CU Boulder)
|Chemistry
|Not delivered
|
 
|-valign="top"
|PPN photolysis
|Eloise Marais (UCL)
|Chemistry
|Not delivered
|
 
|-valign="top"
|Hlobal organic N dep from various emissions; nitrate aromatics updates
|May Fu (SUSTech)
|May Fu (SUSTech)
|Chemistry +<br>Deposition
|Chemistry +<br>Deposition
|Not delivered
|
|-valign="top"
|ALK4 from biogenic vs anthro
|Jared Brewer (UMN)
|Chemistry
|Not delivered
|Not delivered
|
|
Line 213: Line 243:
|Not delivered
|Not delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/2389 geos-chem issue #2389]


|-valign="top"
|-valign="top"
Line 228: Line 259:
|Not delivered
|Not delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/2388 geos-chem issue #2388]


|-valign="top"
|-valign="top"
Line 248: Line 280:
|Minjie Zheng (ETH)
|Minjie Zheng (ETH)
|Emissions
|Emissions
|Not delivered
|Delivered<br>June 2024
|
|
*https://zenodo.org/records/8372652  
*Available at https://zenodo.org/records/8372652  


|-valign="top"
|-valign="top"
Line 261: Line 293:


|-valign="top"
|-valign="top"
|Australian emissions
|Australian Hg emissions (2000-2019)
|Stephen MacFarlane (Wollongong)<br>Jenny Fisher (Wollongong)
|Stephen MacFarlane (Wollongong)<br>Jenny Fisher (Wollongong)
|Emissions
|Emissions
|Not delivered
|Not delivered
|
|
*[https://pubs.rsc.org/en/content/articlelanding/2022/em/d2em00019a 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


|-valign="top"
|-valign="top"
Line 273: Line 307:
|Not delivered
|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"
Line 280: Line 316:
|Not delivered
|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"
Line 301: Line 339:
|Not delivered
|Not delivered
|
|
|-valign="top"
|Archived TCR-2 OH fields for carbon simulations
|Kazu Miyazaki (JPL)
|Input data
|Not delivered
|
*This will be the default OH, but users will have the option of selecting other OH fields


|}
|}
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!width="100px"|Model scope
!width="100px"|Model scope
!width="420px"|Notes and References
!width="420px"|Notes and References
|-valign="top"
|Capture all trop and PBL height changes in budget diagnostics
|Chris Holmes (FSU)<br>Lizzie Lundgren (Harvard)
|Diagnostics
|
*[https://github.com/geoschem/geos-chem/pull/2103 geos-chem PR 2103]
|-valign="top"
|Dust non-sphericity impacts on optical properties
|Inderjeet Singh (WashU)
|Aerosols
|


|-valign="top"
|-valign="top"
Line 352: Line 368:
|KPP standalone + 3D Interface
|KPP standalone + 3D Interface
|Obin Sturm (USC)
|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
|
|
Line 357: Line 385:
|-valign="top"
|-valign="top"
|Load balancing in chemistry solver (GCHP)
|Load balancing in chemistry solver (GCHP)
|Zhouran (Jordan) Sun (WashU)
|Zhouran Sun (WashU)
|Chemistry +<br>Performance
|Chemistry +<br>Performance
|
|


|-valign="top"
|-valign="top"
|UCX chemistry in mesosphere (GCHP/GCClassic)
|Active chemistry in mesosphere for both GCHP and GCClassic
|Helena McDonald (MIT)
|Helena McDonald (MIT)<br>Sebastian Eastham (ICL)
|Chemistry
|Chemistry
|
|
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|
|
*Will have to change negative emissions from soil to a first-order loss process
*Will have to change negative emissions from soil to a first-order loss process
|-valign="top"
|Active mesospheric chemistry
|Helena McDonald (MIT)<br>Seb Eastham (ICL)
|Chemistry
|


|-valign="top"
|-valign="top"
Line 408: Line 430:
|Betty Croft (WashU/Dal)
|Betty Croft (WashU/Dal)
|Diagnostics +<br>Performance
|Diagnostics +<br>Performance
|
|-valign="top"
|Fix obspack - not working in 14.4.0
|Bob Yantosca (Harvard)
|Diagnostics
|
|


Line 433: Line 449:
|Dry Deposition
|Dry Deposition
|
|
*Available at https://zenodo.org/records/3614062#.XzvrH5NKjOR (GEOS-Chem 12.3.0)


|-valign="top"
|-valign="top"
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|-valign="top"
|-valign="top"
|Historic biomass burning (1750-2010)
|Historic biomass burning (1750-2010)
|Pengfei (Gtech)
|Pengfei Liu (Georgia Tech)
|Emissions
|Emissions
|
|
Line 462: Line 479:
|Zichong Cheng (Harvard)
|Zichong Cheng (Harvard)
|Emissions+<br>Carbon simulation
|Emissions+<br>Carbon simulation
|
|-valign="top"
|Fire and anthropogenic emissions not currently turned on (monoterpenes, 1-butadiene etc.)
|Katie Travis (NASA)<br>Kelvin Bates (CU Boulder)
|Emissions
|
|


Line 510: Line 521:
|Integration testing: Add stretched grid
|Integration testing: Add stretched grid
|Lizzie Lundgren (Harvard)
|Lizzie Lundgren (Harvard)
|Quality Assurance
|
|-valign="top"
|Integration testing: Add GCAP2
|GCST
|Quality Assurance
|Quality Assurance
|
|
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|Integration testing: Add GCHP mass flux run
|Integration testing: Add GCHP mass flux run
|Lizzie Lundgren (Harvard)
|Lizzie Lundgren (Harvard)
|Quality Assurance
|
|-valign="top"
|Integration testing: Add run with all diagnostics turned on
|GCST
|Quality Assurance
|Quality Assurance
|
|
Line 535: Line 534:
|Betty Croft (Dalhousie/WashU)
|Betty Croft (Dalhousie/WashU)
|Quality Assurance
|Quality Assurance
|
|-valign="top"
|Strat-adjusted RF in GCC and GCHP
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|Radiation
|
|


Line 603: Line 596:
|Yuzhong Zhang (Westlake)
|Yuzhong Zhang (Westlake)
|Chemistry
|Chemistry
|
|-valign="top"
|VCPs emissions
|Kelvin Bates (CU Boulder)
|Emissions
|
|


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|Canadian forest fire prediction system (Canada government forecast model)
|Canadian forest fire prediction system (Canada government forecast model)
|Robin Stevens (Montreal)
|Robin Stevens (Montreal)
|Emissions
|
|-valign="top"
|Furan emission factors (updates existing emissions)
|Lu Hu (Montana)<br>Lixu Jin (Montana)
|Emissions
|Emissions
|
|
Line 720: Line 701:


|-valign="top"
|-valign="top"
|VCP, cooking: tracers species added i.e., D5, ethanol affecting PAN
|VCP emissions
|Kevin Bates (CU Boulder)
|Kevin Bates (CU Boulder)
|Emissions
|Emissions
Line 726: Line 707:


|-valign="top"
|-valign="top"
|bidirectional land-atmosphere exchange for Hg
|Bidirectional land-atmosphere exchange for Hg
|Yuying Cui (MIT/Tsinghua)
|Yuying Cui (MIT/Tsinghua)
|Hg simulation
|Hg simulation
Line 813: Line 794:
|Melissa Sulprizio (Harvard)
|Melissa Sulprizio (Harvard)
|Structural
|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 885: Line 872:
|Iodine chemistry
|Iodine chemistry
|Becky Alexander (UW)<br>Xuan Wang (CUHK)
|Becky Alexander (UW)<br>Xuan Wang (CUHK)
|Chemistry
|
|-valign="top"
|Chlorine/Perchlorate
|Yukchun Chan (UW)
|Chemistry
|
|-valign="top"
|Playa dust chemistry to improve Cl over land
|Jessica Haskins (Utah)
|Chemistry
|Chemistry
|
|
Line 943: Line 918:


|-valign="top"
|-valign="top"
|new observations (2010-2020) in standardized Hg benchmark for intercomparison
|New observations (2010-2020) in standardized Hg benchmark for intercomparison
|Eric Roy (MIT)/Ari Feinberg (IQF-CSIC)
|Eric Roy (MIT)/Ari Feinberg (IQF-CSIC)
|Hg simulation
|Hg simulation
Line 961: Line 936:


|-valign="top"
|-valign="top"
|possibly updating Hg oxidation chemistry based on Utah field campaigns
|Possibly updating Hg oxidation chemistry based on Utah field campaigns
|Jessica Haskins (Utah)
|Jessica Haskins (Utah)
|Hg simulation
|Hg simulation

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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