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 ==
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|-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"
|[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 (U. Iowa)<br>Jun Wang (U. Iowa)
|Yuanjian Zhang (WashU)
|Emissions
|Emissions
|Simple
|
*Slated for [[GEOS-Chem 14.6.0|14.6.0]]
*[https://github.com/geoschem/HEMCO/pull/279 HEMCO PR #279]
*NOTE: GCHP scale factors need recomputing
|-valign="top"
|Retire CH4, CO2, tagCO simulations in favor of the carbon simulation
|Melissa Sulprizio (Harvard)
|Carbon gases
|Simple
|
*[https://github.com/geoschem/geos-chem/pull/2685 geos-chem PR #2685]
*Need approval from Carbon Cycle WG before merging
|-valign="top"
|Make GC-Classic bit-for-bit reproducible upon restart<br>(part 1 of 2)
|Lizzie Lundgren (Harvard)
|GC-Classic
|Medium
|
*Slated for [[GEOS-Chem 14.6.0|14.6.0]]
*[https://github.com/geoschem/geos-chem/pull/2521 geos-chem PR #2521]
|-valign="top"
|Capture all trop and PBL height changes in budget diagnostics
|Chris Holmes (FSU)<br>Lizzie Lundgren (Harvard)
|Diagnostics
|Medium
|Medium
|
|
*[https://github.com/geoschem/geos-chem/issues/1288 geos-chem issue #1288]
*Slated for [[GEOS-Chem 14.6.0|14.6.0]]
*Incorporates new met field TSOIL1
*[https://github.com/geoschem/geos-chem/pull/2103 geos-chem PR 2103]
 
|-valign="top"
|Fixed PDOWN definition and re-evaporation requirement for washout
|Yuanjian Zhang (WashU)
|Convection
|Simple
|
*Slated for [[GEOS-Chem 14.6.0|14.6.0]]
*[https://github.com/geoschem/geos-chem/pull/2573 geos-chem PR 2573]


|}
|}
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|-valign="top"
|-valign="top"
|ALK4 & R4N2 chemistry
|Correct the issue that injection height has been artificially decreased by HEMCO
|Jared Brewer (UMN)
|Lixu Jun (Montana)
|Chemistry
|Emissions
|TBD
|Simple
|Delivered
|Delivered<br>June 2024
|
|
*[https://github.com/geoschem/geos-chem/issues/1625 geos-chem issue #1625]
*[https://github.com/geoschem/geos-chem/issues/2330 geos-chem issue #2330]
*[https://acmg.seas.harvard.edu/files/acmg/files/brewer2022.pdf Brewer, J.F. et al., J. Geophys. Res., 2023.]
*[https://github.com/geoschem/geos-chem/pull/2358 geos-chem PR #2358]


|-valign="top"
|-valign="top"
|Mass flux regridding fix in MAPL
|Capability to run GCClassic at 0.125x0.15625 resolution
|Tom Clune (GMAO)<br>Seb Eastham (MIT)
|Melissa Sulprizio (Harvard)<br>Xiaolin Wang (Harvard)
|GCHP input regridding
|Nested grid
|Medium
|Simple
|Delivered
|
|
|
*[https://github.com/geoschem/geos-chem/pull/1980 geos-chem PR #1980]
*[https://github.com/geoschem/GCHP/issues/377 GCHP Issue #377]
*[https://github.com/geoschem/HEMCO/pull/290 HEMCO PR #290]
*'''Currently on hold, as the submitted update results in zero diff'''


|-valign="top"
|-valign="top"
|New version of CEDS at 0.1 deg
|Strat-adjusted RF in GCC and GCHP
|Dandan Zhang (WashU)
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|Emissions
|Radiation
|Simple
|Simple
|Delivered June 2024
|Delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/1745 geos-chem issue #1745]
*[https://github.com/geoschem/geos-chem/pull/2525 geos-chem PR #2525]


|-valign="top"
|-valign="top"
|Remove differences in GC-Classic due to HEMCO reading REAL8 restart as REAL4
|Archived TCR-2 OH fields for carbon simulations
|Lizzie Lundgren (Harvard)
|Kazu Miyazaki (JPL)<br>Melissa Sulprizio (Harvard)
|GC-Classic
|Input data
|Medium
|Simple
|Data delivered<br>Oct 2024
|
|
|
*This will be the default OH, but users will have the option of selecting other OH fields
*[https://github.com/geoschem/HEMCO/issues/18 hemco issue #18]
*[https://github.com/geoschem/geos-chem/issues/2537 geos-chem issue #2537]


|-valign="top"
|-valign="top"
|Capture all trop and PBL height changes in budget diagnostics
|Dust non-sphericity impacts on optical properties
|Chris Holmes (FSU)<br>Lizzie Lundgren (Harvard)
|Inderjeet Singh (WashU)
|Diagnostics
|Aerosols
|Medium
|Medium
|Delivered
|Not yet delivered
|
|
*[https://github.com/geoschem/geos-chem/pull/2103 geos-chem PR 2103]


|}
|}
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!width="100px"|Model scope
!width="100px"|Model scope
!width="100px"|Delivery status
!width="100px"|Delivery status
!width="300px"|Notes and References
!width="300px"|Notes and Refereneces




|-valign="top"
|-valign="top"
|Binary Activity Thermodynamic (BAT) model for non-ideal mixing of water and organics in organic aerosol
|Binary Activity Thermodynamic (BAT) model for non-ideal mixing of water and organics in organic aerosol
|Camilo Serrano and Andreas Zuend (McGill)
|Camilo Serrano (McGill)<br>Andreas Zuend (McGill)
|
|Aerosols
|Not delivered
|
 
|-valign="top"
|Extend aerosol settling
|Eloise Marais (UCL)
|
|Not delivered
|
 
|-valign="top"
|Comment back in Ca, Mg, and K cations in aerosol thermo (HETP)
|Becky Alexander (UW)
|
|Not delivered
|
 
|-valign="top"
|FRP-based fire emsisions for eastern US at 0.2 Chris Holmes
|(FSU)
|
|Not delivered
|
 
|-valign="top"
|China agriculture NH3 emissions
|Amos Tai (CUHK)
|
|Not delivered
|Not delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/2392 geos-chem issue #2392]


|-valign="top"
|-valign="top"
|T-dependent anthropogenic VOCs
|Update UCX to include gravitational settling of aerosol species beyond just BCPI
|May Fu (SUSTech)
|Conor Barker (UCL)<br>Eloise Marais (UCL)
|
|Aerosols
|Not delivered
|Not delivered
|
|
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|-valign="top"
|-valign="top"
|Seasalt aerosol from sea ice leads (2002-2011)
|Seasalt aerosol from sea ice leads (2002-2011)
|Hannah (UIUC)
|Hannah Horrowitz (UIUC)
|
|Aerosols
|Not delivered
|Not delivered
|
|
*Offline and online, ready to go in HEMCO (optional in addition to existing seasalt emissions)


|-valign="top"
|-valign="top"
|GEOS online
|Organic nitrogen aerosols and its atmospheric deposition
|Harvard / GMAO
|
|Not delivered
|
 
|-valign="top"
|CESM2-GC online
|Lizzie Lundgren (Harvard); Seb Eastham (ICL)
|
|Not delivered
|
 
|-valign="top"
|WRF-GC online
|May Fu (SUSTech)
|May Fu (SUSTech)
|
|Chemistry +<br>Deposition
|Not delivered
|Not delivered
|
|
*[https://doi.org/10.1093/nsr/nwad244 Y. Li et al. (2023)]
*[https://www.scidb.cn/en/detail?dataSetId=d50f78956506432992dc7a8619a59df1 Code repository]
*Code based on v12 and is being brought up to date


|-valign="top"
|-valign="top"
|BCC-GC online
|Dry deposition to F90 to improve readability
|Lin Zhang (PKU)
|Chris Holmes (FSU)
|
|Dry Deposition
|Not delivered
|Not delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/2389 geos-chem issue #2389]


|-valign="top"
|-valign="top"
|GISS-GC offline (GCAP)
|Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange
|Lee Murray (Rochester)
|Joey Lam  (CUHK)<br>Amos Tai (CUHK)
|
|Dry deposition
|Not delivered
|Delivered<br>Feb 2021
|
|
*[https://github.com/geoschem/geos-chem/pull/629 geos-chem PR #629]


|-valign="top"
|-valign="top"
|GC-YIBS with online fire emissions
|Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3)
|Xu Yue; Hong Liao (NUIST)
|Tia Scarpelli (Carbon Mapper)<br>Melissa Sulprizio (Harvard)
|Emissions
|
|
|Not delivered
|
|


|-valign="top"
|-valign="top"
|P/L species should not contribute to the error norm
|FRP-based fire emissions for eastern US at 0.2 (2019-2020)
|Obin Sturm (PSC)
|Chris Holmes (FSU)
|
|Emissions
|Not delivered
|Not delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/2388 geos-chem issue #2388]


|-valign="top"
|-valign="top"
|Additional 6 peroxynitrates (many PANs like species); improve ALK4 & add ALK6
|China agriculture NH3 emissions
|Katherine Travis (NASA LARC)
|Amos Tai (CUHK)
|
|Emissions
|Not delivered
|Not delivered
|
|


|-valign="top"
|-valign="top"
|Monoterpene oxdation more species&oxdiation products
|T-dependent anthropogenic VOCs
|Kevin Bates (CU Boulder)
|May Fu (SUSTech)
|
|Emissions
|Not delivered
|Not delivered
|
|
*[https://pubs.acs.org/doi/10.1021/acs.est.3c09122 W. Wu et al. (2024]
*Developed parameterizations for the temperature dependence of anthropogenic VOC emissions in China from 3 sectors (transportation, solvent use, and non-solvent industrial activities). Code is being made more general and formulated as a function within HEMCO that will also allow user-input T-dependence parameters.


|-valign="top"
|-valign="top"
|PPN photolysis
|New source functions for transport tracers beryllium-7 and beryllium-10
|Eloise Marais (University College London)
|Minjie Zheng (ETH)
|
|Emissions
|Not delivered
|Delivered<br>June 2024
|
|
*Available at https://zenodo.org/records/8372652


|-valign="top"
|-valign="top"
|global orgainc N dep from various emissions; nitrate aromatics updates
|LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100
|Tzung-May Fu (SUSTech)
|Yang Li (Baylor U)<br>Loretta Mickley (Harvard)
|
|Emissions
|Not delivered
|Delivered
|
|
*Data involves many files- need to think about temporal frequency


|-valign="top"
|-valign="top"
|adaptive chemistry (domain-specific) in WRF-GC
|Hg geogenic emissions (volcanic, rock weathering)
|Tzung-May Fu (SUSTech)
|Eric Roy (MIT)
|
|Emissions
|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"
|Alk4 from biogenic vs anthro
|Hg biomass burning - FINN2.5 & GFED4
|Jared Brewer (UMN)
|Eric Roy (MIT)
|
|Emissions
|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"
|Archived TCR-2 OH fields for carbon simulations
|BCC-GC online
|Kazu Miyazaki (JPL)
|Lin Zhang (PKU)
|
|External Model
|Not delivered
|Not delivered
|
|


|-valign="top"
|-valign="top"
|GOOPy (General Observation Operator in Python): for processing satellite and model output to produce column fields using averaging kernels
|GC-YIBS with online fire emissions
|Hannah Nesser (JPL) , Elise Penn (Harvard)
|Xu Yue (NUIST)<br>Hong Liao (NUIST)
|
|External Model
|Not delivered
|Not delivered
|
|


|-valign="top"
|-valign="top"
|Rastorized shapefiles high-resolution for oil and gas infrastructure in North America
|GISS-GC offline (GCAP)
|Lee Murray (Rochester)
|Lee Murray (Rochester)
|
|GCAP
|Not delivered
|
 
|-valign="top"
|New soil NOx parameterization
|Yi Wang (U. Iowa), Jun Wang (U. Iowa)
|
|Not delivered
|
 
|-valign="top"
|Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange
|Joey Lam, Amos Tai (CUHK)
|
|Not delivered
|
 
|-valign="top"
|LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100
|Yang Li (Baylor University), Loretta Mickley (Harvard)
|
|Not delivered
|
 
|-valign="top"
|Dry deposition to F90 (readability)
|Chris Holmes (FSU)
|
|Not delivered
|
 
|-valign="top"
|Coupling with YIBs
|Xu Yue (NUIST)
|
|Not delivered
|
 
|-valign="top"
|Australian emissions
|Stephen MacFarlane/Jenny Fisher (UWollongong)
|
|Not delivered
|
 
|-valign="top"
|Geogenic emissions (volcanic, rock weathering)
|Eric Roy (MIT)
|
|Not delivered
|
 
|-valign="top"
|Biomass burning - FINN2.5 & GFED4
|Eric Roy (MIT)
|
|Not delivered
|
 
|-valign="top"
|New source functions for transport tracers beryllium-7 and beryllium-10
|Minjie Zheng (ETH)
|
|Not delivered
|Not delivered
|
|
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!width="420px"|Notes and References
!width="420px"|Notes and References


|-valign="top"
|Fixes to stratospheric aerosol settling
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|Aerosols
|


|-valign="top"
|-valign="top"
|DMS chemistry in v14
|DMS chemistry in v14
|Linia Tashmim and Will Porter (UC Riverside)
|Linia Tashmim (UCR)<br>Will Porter (UCR)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|updates to Luo deposition scheme
|NO2+OH+H2O kinetics
|Gan Luo
|Mat Evans (York)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Dust non-sphericity impacts on optical properties
|Use LSODE or Backward Euler integrator in KPP for faster kinetics
|Inderjeet Singh (WashU)
|Bob Yantosca (Harvard)
|
|Chemistry
|
|
*LSODE appears to be non-thread-safe for OpenMP parallelization due to legacy code, and thus fails when used in GEOS-Chem Classic.  Bob Y. is investigating if this can be fixed, or if we should proceed to using Backwards Euler.


|-valign="top"
|-valign="top"
|Biomass burning for TOMAS
|Load balancing in chemistry solver (GCHP)
|Nicole June (CSU)
|Zhouran Sun (WashU)
|
|Chemistry +<br>Performance
|
|


|-valign="top"
|-valign="top"
|Historic biomass burning ()
|Active chemistry in mesosphere for both GCHP and GCClassic
|Pengfei (Gtech)
|Helena McDonald (MIT)<br>Sebastian Eastham (ICL)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Rice methane
|Updated aromatic oxidation
|Zichong Cheng (Harvard)
|Stephen MacFarlane (Wollongong)<br>Jenny Fisher (Wollongong)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Fire and anthropogenic emissions not currently turned on (monoterpenes, 1-butadiene etc.)
|MCO3 uptake by cloud forming MP; leading to lower PAN
|Katie Travis / Kelvin Bates
|Laura Yang (Harvard)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|RRTMG Documentation
|Implement isotope simulation for CH4 in the carbon simulation
|GCST
|Lee Murray (Rochester)
|
|Chemistry
|
|
*Will have to change negative emissions from soil to a first-order loss process


|-valign="top"
|-valign="top"
|KPP standalone + 3D Interface
|Documentation for adding additional aerosol species
|Obin Sturm (PSC)
|Connor Barker (UCL)
|
|Documentation
|
|


|-valign="top"
|-valign="top"
|Load balancing in chemistry solver (GCHP)
|Column diagnostics
|Zhouran Sun (WashU)
|Lizzie Lundgren (Harvard)<br>Viral Shah (GMAO)
|
|Diagnostics
|
|


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|TOMAS rate diagnostics -- improve performance
|TOMAS rate diagnostics -- improve performance
|Betty Croft (WashU/Dal)
|Betty Croft (WashU/Dal)
|
|Diagnostics +<br>Performance
|
 
|-valign="top"
|UCX chemistry in mesosphere (GCHP/GCClassic)
|Helena McDonald (MIT)
|
|
 
|-valign="top"
|Column diagnostics
|Lizzie Lundgren (Harvard), Viral Shah (GMAO)
|
|
|


|-valign="top"
|-valign="top"
|Fix obspack - not working in 14.4.0
|Archive gamma values from heterogeneous chemistry
|Bob Yantosca (Harvard)
|Bob Yantosca (Harvard)
|
|Diagnostics
|
|


|-valign="top"
|-valign="top"
|Reaction rates not working for het chem
|RRTMG Documentation
|Bob Yantosca (Harvard)
|
|
 
|-valign="top"
|Improvements to Cloud-J for ESMs
|Lizzie Lundgren (Harvard)
|
|
 
|-valign="top"
|Add error trap for duplicate scale factors in HEMCO
|Bob Yantosca (Harvard)
|
|
 
|-valign="top"
|Continue cleanup of C-preprocessor switches
|Lizzie Lundgren (Harvard)
|
|
 
|-valign="top"
|Fix pressure handling in HEMCO standalone
|Melissa Sulprizio (Harvard)
|
|
 
|-valign="top"
|Integration testing: Add stretched grid
|Lizzie Lundgren (Harvard)
|
|
 
|-valign="top"
|Integration testing: Add GCAP2
|GCST
|GCST
|
|Documentation
|
|


|-valign="top"
|-valign="top"
|Integration testing: Add GCHP mass flux run
|Canopy Physics Model
|Lizzie Lundgren (Harvard)
|Sam Silva (MIT)
|
|Dry Deposition
|
|
*Available at https://zenodo.org/records/3614062#.XzvrH5NKjOR (GEOS-Chem 12.3.0)


|-valign="top"
|-valign="top"
|Integration testing: Add run with all diagnostics turned on
|Dry deposition diagnostics by land cover
|GCST
|Holly Nowell (FSU)<br>Chris Holmes (FSU)
|
|Dry Deposition
|
|


|-valign="top"
|-valign="top"
|Integration testing: Reinstate TOMAS40
|Dry deposition process diagnostics
|Betty Croft (Dalhousie/WashU)
|Holly Nowell (FSU)<br>Chris Holmes (FSU)
|
|Dry Deposition
|
|


|-valign="top"
|-valign="top"
|Updated aromatic oxidation
|Biomass burning for TOMAS
|Stephen MacFarlane/Jenny Fisher (University of Wollongong)
|Nicole June (CSU)
|
|Emissions +<br>Microphysics
|
|


|-valign="top"
|-valign="top"
|MCO3 uptake by cloud forming MP; leading to lower PAN
|Historic biomass burning (1750-2010)
|Laura Yang (Harvard)
|Pengfei Liu (Georgia Tech)
|
|Emissions
|
|


|-valign="top"
|-valign="top"
|Implement isotope simulation for CH4 in the carbon simulation
|New prior CO2 biospheric fluxes from CMS-FLUX and GMAO
|Lee Murray (Rochester)
|Kevin Bowman (JPL)<br>Lesley Ott (GMAO)
|
|Emissions
|
|
*GMAO can provide high-resolution  fluxes (as high as 12 km)


|-valign="top"
|-valign="top"
|Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3)
|Snowpack Br2 emission
|Melissa Sulprizio (Harvard), Tia Scarpelli (Carbon MAPPER)
|Chris Holmes (FSU)
|
|Emissions
|
|


|-valign="top"
|-valign="top"
|New prior biospheric fluxes from CMS-FLUX and GMAO
|EDGAR v8.1_toxHg emissions for 1970-2022
|Kevin Bowman (JPL), Lesley Ott (GMAO)
|Eric Roy (MIT)
|
|Emissions
|
|


|-valign="top"
|-valign="top"
|Strat-adjusted RF in GCC and GCHP
|Improve pressure handling in GCHP advection
|Connor Barker, Eloise Marais (UCL)
|Yuanjian Zhang (WashU)<br>Seb Eastham (ICL)
|
|GCHP
|
|


|-valign="top"
|-valign="top"
|Fixes to stratospheric aerosol settling
|Add error trap for duplicate scale factors in HEMCO
|Connor Barker, Eloise Marais (UCL)
|Bob Yantosca (Harvard)
|
|HEMCO
|
|


|-valign="top"
|-valign="top"
|Active mesospheric chemistry
|Integration testing: Add stretched grid
|Helena McDonald (MIT), Seb Eastham (IC)
|Lizzie Lundgren (Harvard)
|
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Documentation for adding additional aerosol species
|Integration testing: Add GCHP mass flux run
|Connor Barker (UCL)
|Lizzie Lundgren (Harvard)
|
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Canopy Physics Model
|Integration testing: Reinstate TOMAS40
|Sam Silva (MIT)
|Betty Croft (Dalhousie/WashU)
|
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Dry deposition diagnostics by land cover
|Continue cleanup of C-preprocessor switches
|Holly Nowell, Chris Holmes (FSU)
|Lizzie Lundgren (Harvard)
|
|Structural
|
 
|-valign="top"
|Dry deposition process diagnostics
|Holly Nowell, Chris Holmes (FSU)
|
|
 
|-valign="top"
|Snowpack Br2 emission
|Chris Holmes (FSU)
|
|
 
|-valign="top"
|EDGAR v8.1_toxHg emissions for 1970-2022
|Eric Roy (MIT)
|
|
|


|-valign="top"
|-valign="top"
|Hg inputs needed for CloudJ (edit text file with optical properties); may need concentrations instead of AOD
|Updates to Luo deposition scheme
|Viral Shah (NASA GMAO)
|Gan Luo (Albany)
|
|Wet Deposition
|
 
|-valign="top"
|Improve pressure handling in GCHP advection
|Yuanjian Zhang (WashU), Seb Eastham (ICL)
|
|
|
*New version, keep as switch (not default)


|-valign="top"
|-valign="top"
|Testing the use of a new scavenging parameterization developed by Luo and Yu for cold cloud with Pb-210 aerosol tracer
|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)
|Gan Luo (Albany)<br>Fangqun Yu (Albany)
|
|Wet Deposition
|
|


Line 610: Line 496:
!width="100px"|Model scope
!width="100px"|Model scope
!width="420px"|Notes and References
!width="420px"|Notes and References
|-valign="top"
|ML algorithms for bulk aerosol
|Arshad Nair (Albany)<br>Fangqun Yu (Albany)
|Aerosols
|


|-valign="top"
|-valign="top"
|Heterogeneous sulfate chemistry
|Heterogeneous sulfate chemistry
|Katie Travis
|Katie Travis (NASA)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Re-binning of off-line sea salt and dust for TOMAS
|H2 as an active species
|Betty Croft (Dalhousie)
|Seb Eastham (ICL)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|TOMAS nucleation updates
|HCN, acetonitrile as fire tracers
|Sam O'Donnell (CSU)
|Kevin Bates (CU Boulder)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|ML algorithms for bulk aerosol
|Implement ethane in carbon simulation
|Arshad Nair and Fangqun Yu (SUNY Albany)
|Yuzhong Zhang (Westlake)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Stratospheric aerosol APM
|Mesospheric source of CO
|Fangqun Yu (SUNY Albany)
|Dylan Jones (UofT)<br>Pam Wales (NASA GSFC)
|
|Emissions
|
|


|-valign="top"
|-valign="top"
|VCPs emissions
|Drought-stress algorithm
|Kelvin (CU Boulder)
|Wei Li (Houston)
|
|Emissions
|
|


|-valign="top"
|-valign="top"
|Canadian forest fire prediction system (Canada government forecast model)
|Physically-based resolution correction for BVOC emissions using MEGAN
|Robin (Montreal)
|May Fu (SUSTech)
|
|Emissions
|
|


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


|-valign="top"
|-valign="top"
|Cooking emissions (not biofuel)
|Cooking emissions (not biofuel)
|Kelvin (CU Boulder)
|Kelvin Bates (CU Boulder)
|
|Emissions
|
|


|-valign="top"
|-valign="top"
|State-specific annual emissions scaling factors (US) (1990-2021)
|State-specific annual emissions scaling factors (US) (1990-2021)
|Ishir (MIT)
|Ishir Dutta (MIT)
|
|Emissions
|
|


Line 674: Line 566:
|GISS-GC online
|GISS-GC online
|Lee Murray (Rochester)
|Lee Murray (Rochester)
|
|External model
|
 
|-valign="top"
|CESM2-GC offline
|Seb Eastham (ICL); Lee Murray (Rochester)
|
|
 
|-valign="top"
|Transition from MERRA-2 to GEOS-IT for benchmarking
|Yuanjian Zhang (WashU)
|
|
|


|-valign="top"
|-valign="top"
|Hybrid MPI-OpenMP in GCHP
|Hybrid MPI-OpenMP in GCHP
|Seb Eastham (MIT); Killian Murphy (York); Lizzie Lundgren (Harvard)
|Seb Eastham (MIT)<br>Killian Murphy (York)<br>Lizzie Lundgren (Harvard)
|
|GCHP
|
 
|-valign="top"
|Separate mixing, emissions, and drydep
|Yuanjian Zhang (WashU)
|
|
|


Line 704: Line 578:
|MAPL3: Update to MAPL3 in GCHP, including replacement of ExtData.rc and HISTORY.rc with YAML files
|MAPL3: Update to MAPL3 in GCHP, including replacement of ExtData.rc and HISTORY.rc with YAML files
|Lizzie Lundgren (Harvard)
|Lizzie Lundgren (Harvard)
|
|GCHP
|
|


Line 710: Line 584:
|MAPL3: Comply with MAPL "positive" standard in GCHP diagnostic files
|MAPL3: Comply with MAPL "positive" standard in GCHP diagnostic files
|Lizzie Lundgren (Harvard)
|Lizzie Lundgren (Harvard)
|
|GCHP
|
|


Line 716: Line 590:
|MAPL3: Wildcards in GCHP History
|MAPL3: Wildcards in GCHP History
|Lizzie Lundgren (Harvard)
|Lizzie Lundgren (Harvard)
|
|GCHP
|
|


Line 722: Line 596:
|MAPL3: Output emissions with positive up convention in GCHP
|MAPL3: Output emissions with positive up convention in GCHP
|Lizzie Lundgren (Harvard)
|Lizzie Lundgren (Harvard)
|
|GCHP
|
|


Line 728: Line 602:
|Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone
|Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone
|Bob Yantosca (Harvard)
|Bob Yantosca (Harvard)
|
|Performance
|
|


|-valign="top"
|-valign="top"
|Automate integration testing on AWS
|Photophysical oxidation of aldehydes
|Yidan Tang (WashU)
|Paulo Sebastianelli (Wollongong)<br>Jenny Fisher (Wollongong)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|KPP standalone in GEOS-Chem
|DMS updates
|Obin Sturm (USC); Bob Yantosca (Harvard)
|Will Porter (UCR)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Limit allocation of State_Met to what is needed per simulation
|Furans emission and chemistry
|Melissa Sulprizio (Harvard)
|Lixu Jin (Montana)<br>Lu Hu (Montana)
|
|Chemistry + <br>Emissions
|
|


|-valign="top"
|-valign="top"
|Intel IFX compiler
|Cl2 prodcution from Fe aerosol
|Bob Yantosca (Harvard)
|Qianjie Chen (HK Poly)<br>Becky Alexander (UW)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|CMake option to only build libraries but not executable, also passing C-preprocessor statements to turn off code
|VCP emissions
|Bob Yantosca (Harvard); Lee Murray (Rochester)
|Kevin Bates (CU Boulder)
|
|Emissions
|
|


|-valign="top"
|-valign="top"
|Remove differences introduced when breaking up GC-Classic runs in time; and flexible precision in HEMCO
|Bidirectional land-atmosphere exchange for Hg
|Lizzie Lundgren (Harvard)
|Yuying Cui (MIT/Tsinghua)
|
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Integration testing: Add across end of year run
|OH covariances for inversions
|GCST
|Elise Penn (Harvard)
|
|Inversions
|
|


|-valign="top"
|-valign="top"
|Integration testing: Add GEOS-IT
|CESM2-GC offline
|Yuanjian Zhang (WashU)
|Seb Eastham (ICL)<br>Lee Murray (Rochester)
|
|Met fields
|
|


|-valign="top"
|-valign="top"
|Photophysical oxidation of aldehydes
|Re-binning of off-line sea salt and dust for TOMAS
|Paulo Sebastianelli/Jenny Fisher (University of Wollongong)
|Betty Croft (Dalhousie)
|
|Microphysics
|
|


|-valign="top"
|-valign="top"
|DMS updates
|TOMAS nucleation updates
|Will Porter (UCR)
|Sam O'Donnell (CSU)
|
|Microphysics
|
|


|-valign="top"
|-valign="top"
|Furans emission and chemistry
|Stratospheric aerosol APM
|Lixu Jin/Lu Hu(U Montana)
|Fangqun Yu (SUNY Albany)
|
|Microphysics
|
|


|-valign="top"
|-valign="top"
|Cl2 prodcution from Fe aerosol Qianjie Chen
|Transition from MERRA-2 to GEOS-IT for benchmarking
|(Hong Kong Poly)/Becky Alexander (UW)
|Yuanjian Zhang (WashU)
|
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|VCP, cooking: tracers species added i.e., D5, ethanol affecting PAN
|Automate integration testing on AWS
|Kevin Bates (CU Boulder)
|Yidan Tang (WashU)
|
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|HCN, acetonitrile as fire tracers
|Integration testing: Add across end of year run
|Kevin Bates (CU Boulder)
|GCST
|
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Implement ethane in carbon simulation
|Integration testing: Add GEOS-IT
|Yuzhong Zhang (Westlake)
|Yuanjian Zhang (WashU)
|
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|OH covariances for inversions
|Separate mixing, emissions, and drydep
|Elise Penn (Harvard)
|Yuanjian Zhang (WashU)
|
|Structural
|
|


|-valign="top"
|-valign="top"
|H2 as an active species
|Intel IFX compiler
|Seb Eastham (IC)
|Bob Yantosca (Harvard)
|
|Structural
|
|


|-valign="top"
|-valign="top"
|Mesospheric source of CO
|CMake option to only build libraries but not executable, also passing C-preprocessor statements to turn off code
|Dylan Jones (UofT), Pam Wales (GSFC)
|Bob Yantosca (Harvard)<br>Lee Murray (Rochester)
|
|Structural
|
|


|-valign="top"
|-valign="top"
|Drought-stress algorithm
|Remove differences introduced when breaking up GC-Classic runs in time; and flexible precision in HEMCO
|Wei Li (U. Houston)
|Lizzie Lundgren (Harvard)
|
|Structural
|
|


|-valign="top"
|-valign="top"
|Physically-based resolution correction for BVOC emissions using MEGAN
|Limit allocation of State_Met to what is needed per simulation
|May Fu (SUSTech)
|Melissa Sulprizio (Harvard)
|
|Structural
|
|


|-valign="top"
|-valign="top"
|bidirectional land-atmosphere exchange for Hg
|Using 3-D precipitation fluxes to calculate precipitation formation and re-evaporation in scavenging (to be consistent with GEOS/GOCART & ground precipitation)
|Yuying Cui (MIT/Tsinghua)
|Gan Luo (Albany)<br>Hongyu Liu (NIA/LaRC)<br>Bo Zhang (NIA/LaRC)
|
|Wet deposition
|
|


Line 873: Line 747:
|Modal aerosol model (MAM7) in GCHP
|Modal aerosol model (MAM7) in GCHP
|Shreya Sharma (MIT)
|Shreya Sharma (MIT)
|
|Aerosols
|
|


|-valign="top"
|-valign="top"
|Continental chloride particle emissions (salty dust, road salt)
|Online OCIM ocean biogeochemistry
|Jessica Haskins (Utah)
|Lee Murray (Rochester)<br>Hannah Horowitz (UIUC)<br>Chris Holmes (FSU)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Multivolatility emission inventory to address gaps in EDGAR/HTAP etc.
|Perchlorate chemistry
|Ruochong (Tshingua)
|Yuk Chun Chan (UW)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Lightning NOx production rates
|Non-stomatal dry deposition (2-layer canopy model)
|Bex Horner (UCL)
|Michael Vermeuel (Purdue)
|
|Dry Deposition
|
|


|-valign="top"
|-valign="top"
|Online OCIM ocean biogeochemistry
|Continental chloride particle emissions (salty dust, road salt)
|Lee Murray (Rochester); Hannah Horowitz (UIUC); Chris Holmes (FSU)
|Jessica Haskins (Utah)
|
|Emissions
|
|


|-valign="top"
|-valign="top"
|Investigate and improve performance of aerosol chemistry
|Multivolatility emission inventory to address gaps in EDGAR/HTAP etc.
|Bob Yantosca (Harvard)
|Ruochong (Tshingua)
|
|Emissions
|
|


|-valign="top"
|-valign="top"
|Stretched-grid plotting in GCPy
|Lightning NOx production rates
|Killian Murphy (York)
|Bex Horner (UCL)
|
|Emissions
|
|


|-valign="top"
|-valign="top"
|HFO and CF3CHO
|HFO and CF3CHO
|Beth Killen/Jenny Fisher (University of Wollongong)
|Beth Killen (Wollongong)<br>Jenny Fisher (Wollongong)
|
|Chemistry
|
|


Line 921: Line 795:
|Glyoxal updates from isoprene
|Glyoxal updates from isoprene
|Tzung-May Fu (SUSTech)
|Tzung-May Fu (SUSTech)
|
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Iodine chemistry
|Iodine chemistry
|Becky Alexander (UW)/Xuan Wang (cityU HK)
|Becky Alexander (UW)<br>Xuan Wang (CUHK)
|
|Chemistry
|
 
|-valign="top"
|Chlorine/Perchlorate
|Yukchun Chan (UW)
|
|
 
|-valign="top"
|Playa dust chemistry to improve Cl over land
|Jessica Haskins (Utah)
|
|
 
|-valign="top"
|Species database more accessible; doc updates; TOL discussion
|Jessica Haskins (Utah)
|
|
 
|-valign="top"
|Extend IMI to CO2 (ICI)
|Hannah Nesser (JPL)
|
|
 
|-valign="top"
|Perchlorate chemistry
|Yuk Chun Chan (UW)
|
|
 
|-valign="top"
|Non-stomatal dry deposition (2-layer canopy model)
|Michael Vermeuel (Purdue)
|
|
|


|-valign="top"
|-valign="top"
|GFED5
|GFED5 biomass burning
|Eric Roy (MIT)
|Eric Roy (MIT)
|
|Emissions
|
|


|-valign="top"
|-valign="top"
|Ocean Hg surface concentrations for 2010-2020 from multi-model ensemble
|Ocean Hg surface concentrations for 2010-2020 from multi-model ensemble
|Eric Roy (MIT)/Ari Feinberg (IQF-CSIC)
|Eric Roy (MIT)<br>Ari Feinberg (IQF-CSIC)
|
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Soil Hg emissions 2010-2020
|Soil Hg emissions 2010-2020
|Eric Roy (MIT)/Ari Feinberg (IQF-CSIC)
|Eric Roy (MIT)<br>Ari Feinberg (IQF-CSIC)
|
|Hg simulation
|
|


Line 987: Line 825:
|Air-sea exchange parameterization
|Air-sea exchange parameterization
|Eric Roy (MIT)
|Eric Roy (MIT)
|
|Hg simulation
|
|


Line 993: Line 831:
|Soil Hg emissions parameterization
|Soil Hg emissions parameterization
|Ari Feinberg (IQF-CSIC)
|Ari Feinberg (IQF-CSIC)
|
|Hg simulation
|
|


Line 999: Line 837:
|Sea salt uptake of GOM
|Sea salt uptake of GOM
|Eric Roy (MIT)
|Eric Roy (MIT)
|
|Hg simulation
|
|


Line 1,005: Line 843:
|Photoreduction rate constant
|Photoreduction rate constant
|Eric Roy (MIT)
|Eric Roy (MIT)
|
|Hg simulation
|
|


|-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
|
|


Line 1,017: Line 855:
|Hg simulation in GCHP
|Hg simulation in GCHP
|Eric Roy (MIT)
|Eric Roy (MIT)
|
|Hg simulation
|
|


Line 1,023: Line 861:
|OCIM - biogeochemical model - (C/P/N/Fe - no Hg yet) (MATLAB)
|OCIM - biogeochemical model - (C/P/N/Fe - no Hg yet) (MATLAB)
|Hannah Horowitz (UIUC)
|Hannah Horowitz (UIUC)
|Hg simulation
|
|-valign="top"
|Possibly updating Hg oxidation chemistry based on Utah field campaigns
|Jessica Haskins (Utah)
|Hg simulation
|
|
|-valign="top"
|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
|
|


|-valign="top"
|-valign="top"
|possibly updating Hg oxidation chemistry based on Utah field campaigns
|Extend IMI to CO2 (ICI)
|Jess Haskins (Utah)
|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
|
|


Line 1,035: Line 897:
|PAH - update from version 11
|PAH - update from version 11
|Lexia Cicone (MIT)
|Lexia Cicone (MIT)
|POPs simulation
|
|
|-valign="top"
|Species database more accessible; doc updates; TOL discussion
|Jessica Haskins (Utah)
|Structural
|
|


|-valign="top"
|-valign="top"
|Global emission inventory of metals
|Stretched-grid plotting in GCPy
|Tzung-May Fu (SUSTech); He Zhong Tian (Peking Normal U)
|Killian Murphy (York)
|
|Tools
|
|


Line 1,047: Line 915:
|Model inter-comparison of transport (GEOS, GCHP, GCClassic)
|Model inter-comparison of transport (GEOS, GCHP, GCClassic)
|Lizzie Lundgren (Harvard), Emma Knowland (NASA)
|Lizzie Lundgren (Harvard), Emma Knowland (NASA)
|
|Transport
|
|


Line 1,053: Line 921:
|Comparing mass fluxes in GCHP vs. traditional lat/lon wind
|Comparing mass fluxes in GCHP vs. traditional lat/lon wind
|Yuanjian Zhang (WashU), Seb Eastham (ICL)
|Yuanjian Zhang (WashU), Seb Eastham (ICL)
|
|Transport
|
 
|-valign="top"
|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)
|
|
|


|}
|}

Latest revision as of 17:26, 4 February 2025

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
Use USTAR read from GEOS instead of calculating from U10M and V10M Yuanjian Zhang (WashU) Emissions Simple
Retire CH4, CO2, tagCO simulations in favor of the carbon simulation Melissa Sulprizio (Harvard) Carbon gases Simple
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
Fixed PDOWN definition and re-evaporation requirement for washout Yuanjian Zhang (WashU) Convection 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
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)
Organic nitrogen aerosols and its atmospheric deposition 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
Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3) Tia Scarpelli (Carbon Mapper)
Melissa Sulprizio (Harvard) 		Emissions
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
  • W. Wu et al. (2024
  • Developed parameterizations for the temperature dependence of anthropogenic VOC emissions in China from 3 sectors (transportation, solvent use, and non-solvent industrial activities). Code is being made more general and formulated as a function within HEMCO that will also allow user-input T-dependence parameters.
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
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
NO2+OH+H2O kinetics Mat Evans (York) Chemistry
Use LSODE or Backward Euler integrator in KPP for faster kinetics Bob Yantosca (Harvard) Chemistry
  • LSODE appears to be non-thread-safe for OpenMP parallelization due to legacy code, and thus fails when used in GEOS-Chem Classic. Bob Y. is investigating if this can be fixed, or if we should proceed to using Backwards Euler.
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
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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