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"|Major 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 14.0.0]]'''
|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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|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2475/2020/gmd-13-2475-2020.pdf Adaptive chemical solver] (as option) / KPP 3.0.0
|Use USTAR read from GEOS instead of calculating from U10M and V10M
|Mike Long (Harvard) <br> Haipeng Lin (Harvard) <br> Bob Yantosca (GCST) <br> Lu Shen (PKU)
|Yuanjian Zhang (WashU)
|Chemistry
|Complicated
|
*KPP 3.0.0-rc.0 (release candidate for 3.0.0) is being prepared for concurrent release with Haipeng Lin's paper
*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]
 
|-valign="top"
|[https://acp.copernicus.org/articles/19/7055/2019/ Joint CO2-CO-CH4-OCS simulation via KPP]
|Beata Bukosa (NIWA)<br>Kevin Bowman (JPL)<br>Mike Long (Harvard)
|Specialty simulation
|Medium
|
*[https://github.com/geoschem/geos-chem/issues/654 geoschem/geos-chem #654]
 
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/331 Provide climatologies for open fire emissions]
|Melissa Sulprizio (Harvard)
|Emissions
|Emissions
|Simple
|Simple
|
|
*Slated for [[GEOS-Chem 14.6.0|14.6.0]]
*[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"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/655 Climatologies for lightning NOx]
|Retire CH4, CO2, tagCO simulations in favor of the carbon simulation
|Lee Murray (Rochester)<br>Melissa Sulprizio (Harvard)
|Melissa Sulprizio (Harvard)
|Emissions
|Carbon gases
|Simple
|
 
|-valign="top"
|[https://github.com/geoschem/geos-chem/discussions/1022 Add new species concentration diagnostic in units of molec/cm3]
|Haipeng Lin (Harvard)
|Diagnostics
|Simple
|Simple
|
|
*See [https://github.com/geoschem/geos-chem/pull/1264 geoschem/geos-chem PR #1264]
*[https://github.com/geoschem/geos-chem/pull/2685 geos-chem PR #2685]
*Need approval from Carbon Cycle WG before merging


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/770 Output satellite diagnostics as NetCDF]
|Make GC-Classic bit-for-bit reproducible upon restart<br>(part 1 of 2)
|Eloise Marais (UCL)  
|Diagnostics
|Simple
|
*See [https://github.com/geoschem/geos-chem/pull/1134 geoschem/geos-chem #1134]
 
|-valign="top"
|Upgrade Fast-JX to Cloud-J
|Lizzie Lundgren (Harvard)
|Lizzie Lundgren (Harvard)
|Structural
|GC-Classic
|Complicated
|Medium
|
|
*See [https://github.com/geoschem/cloud-j geoschem/cloud-j]
*Slated for [[GEOS-Chem 14.6.0|14.6.0]]
*[https://github.com/geoschem/geos-chem/pull/2521 geos-chem PR #2521]


|-valign="top"
|-valign="top"
|Column diagnostics
|Capture all trop and PBL height changes in budget diagnostics
|Bob Yantosca (Harvard)
|Chris Holmes (FSU)<br>Lizzie Lundgren (Harvard)
|Diagnostics
|Diagnostics
|Simple
|Medium
|
|
*Slated for [[GEOS-Chem 14.6.0|14.6.0]]
*[https://github.com/geoschem/geos-chem/pull/2103 geos-chem PR 2103]


|-valign="top"
|-valign="top"
|RO2 diagnostic
|Add run directory creation support for processed cubed-sphere GEOS-IT meteorology
|Melissa Sulprizio (Harvard)
|Yuanjian Zhang (WashU)
|Diagnostics
|GCHP
|Simple
|Simple
|
|
*Slated for [[GEOS-Chem 14.6.0|14.6.0]]
*[https://github.com/geoschem/geos-chem/pull/2616 geos-chem PR 2616]


|-valign="top"
|-valign="top"
|Update transport tracer simulation for consistency with the tracer gridded component in GEOS
|Fixed PDOWN definition and re-evaporation requirement for washout
|Melissa Sulprizio (Harvard)
|Yuanjian Zhang (WashU)
|TransportTracer simulation
|Convection
|Simple
|Simple
|
|
*Slated for [[GEOS-Chem 14.6.0|14.6.0]]
*[https://github.com/geoschem/geos-chem/pull/2573 geos-chem PR 2573]


|}
|}


== Delivered and 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"
|-valign="top"
|TOMAS in GCHP
|Correct the issue that injection height has been artificially decreased by HEMCO
|Betty Croft (WashU)
|Lixu Jun (Montana)
|Aerosols
|Emissions
|Simple
|See:
*[https://github.com/geoschem/GCHP/pull/221 geoschem/GCHP PR #221]
*[https://github.com/geoschem/geos-chem/pull/1261 geoschem/geos-chem PR #1261]
*[https://github.com/geoschem/HEMCO/pull/145 geoschem/HEMCO PR #145]
 
|-valign-"top"
|[https://github.com/arifein/pythonHgBenchmark Updated Hg benchmarking scripts in python]
|Ari Feinberg (MIT)
|Benchmarking
|Simple
|Simple
|Delivered<br>June 2024
|
|
* Ideally to be incorporated in GCPy
*[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://doi.org/10.34894/SZ2KOI AMAP 2015 emissions from GMA2018]
|Capability to run GCClassic at 0.125x0.15625 resolution
|Helene Angot(MIT)<br>Ari Feinberg (MIT)<br>Noelle Selin (MIT)
|Melissa Sulprizio (Harvard)<br>Xiaolin Wang (Harvard)
|Hg simulation
|Nested grid
|Simple
|Simple
|Delivered
|
|
* Delivered to GCST (Jul 2022)
*[https://github.com/geoschem/geos-chem/pull/1980 geos-chem PR #1980]
*[https://github.com/geoschem/HEMCO/pull/290 HEMCO PR #290]


|-valign="top"
|-valign="top"
|Tagged O3 simulation in GCHP
|Strat-adjusted RF in GCC and GCHP
|Xingpei Yu (PKU)
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|TagO3 simulation
|Radiation
|Simple
|Simple
|Delivered
|
|
*[https://github.com/geoschem/geos-chem/pull/1167 geoschem/geos-chem PR #1167]
*[https://github.com/geoschem/geos-chem/pull/2525 geos-chem PR #2525]
* Needs to be updated to a more recent version of GCHP


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/1288 New soil NOx parameterization]
|Archived TCR-2 OH fields for carbon simulations
|Yi Wang (U. Iowa)<br>Jun Wang (U. Iowa)
|Kazu Miyazaki (JPL)<br>Melissa Sulprizio (Harvard)
|Emissions
|Input data
|Simple
|Simple
|Data delivered<br>Oct 2024
|
|
*Delivered to GCST (Jun 2022)
*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"
|[https://doi.org/10.7910/DVN/23BRII Global continental chlorine (pCl and HCl) emissions]
|Dust non-sphericity impacts on optical properties
|Bingqing Zhang (Georgia Tech)<br>Pengfei Liu (Georgia Tech)
|Inderjeet Singh (WashU)
|Emissions
|Aerosols
|Simple
|
*Delivered to GCST (Jul 2022)
 
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/1301 HTAPv3 at 0.1 deg]
|Dandan Zhang (WashU)
|Emissions
|Simple
|
*Delivered to GCST (Jul 2022)
 
|-valign="top"
|[https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2006GL026015 Stratospheric HCN chemistry]
|Armin Kleinbohl (JPL)<br>Debra Weisenstein (Harvard, retired)
|Chemistry
|Medium
|Medium
|Not yet delivered
|
|
*Delivered to GCST (Jun 2020)
|-valign="top"
|[https://github.com/geoschem/geos-chem/pull/629 Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange]
|Joey Lam(CUHK)<br>Amos Tai (CUHK)
|Science
|Simple
|
*Delivered to GCST (Feb 2021)
* [https://github.com/geoschem/geos-chem/pull/629 geoschem/geos-chem #629]
|-valign="top"
|LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100
|Yang Li (Baylor University)<br>Loretta Mickley (Harvard)
|Emissions
|Simple
|
*Data files delivered to GCST (July 2021)
*Data are quite large - need to think about storage, compression


|}
|}


== Ready but not delivered ==
== Ready to go in ==


Features listed in this table are ready but have not been delivered to the GEOS-Chem Support Team.
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="300px"|Notes and References
!width="100px"|Delivery status
!width="300px"|Notes and Refereneces
 


|-valign="top"
|-valign="top"
|Furans / Biomass burning
|Binary Activity Thermodynamic (BAT) model for non-ideal mixing of water and organics in organic aerosol
|Colette Heald (MIT)<br>Jessica Haskins (MIT)
|Camilo Serrano (McGill)<br>Andreas Zuend (McGill)
|Chemistry
|Aerosols
|Not delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/2392 geos-chem issue #2392]


|-valign="top"
|-valign="top"
|Online H2 chemistry
|Update UCX to include gravitational settling of aerosol species beyond just BCPI
|Maria Paula Pérez-Peña (UNSW)<br>Jenny Fisher (UOW)<br>Dylan Millet (UMN)
|Conor Barker (UCL)<br>Eloise Marais (UCL)
|Chemistry
|Aerosols
|Not delivered
|
|


|-valign="top"
|-valign="top"
|Alk4 & R4N2 chemistry
|Seasalt aerosol from sea ice leads (2002-2011)
|Jared Brewer (Harvard)
|Hannah Horrowitz (UIUC)
|Chemistry
|Aerosols
|Not delivered
|
|
*Offline and online, ready to go in HEMCO (optional in addition to existing seasalt emissions)


|-valign="top"
|-valign="top"
|Organic acids (RCOOH)
|Global organic N dep from various emissions; nitrate aromatics updates
|Katie Travis (NASA)
|May Fu (SUSTech)
|Chemistry
|Chemistry +<br>Deposition
|Not delivered
|
|


|-valign="top"
|-valign="top"
|Fix C2H4 chemistry bug
|Dry deposition to F90 to improve readability
|Lixu Jin (UMT)
|Chris Holmes (FSU)
|Chemistry
|Dry Deposition
|Not delivered
|
|
* Bug issue raised by Kelvin, slated for 14.1
*[https://github.com/geoschem/geos-chem/issues/2389 geos-chem issue #2389]


|-valign="top"
|-valign="top"
|Update reactions with new JPL & IUPAC recommendations
|Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange
|Kelvin Bates (Harvard)
|Joey Lam  (CUHK)<br>Amos Tai (CUHK)
|Chemistry
|Dry deposition
|Delivered<br>Feb 2021
|
|
* Currently running simulations to check magnitude of changes
*[https://github.com/geoschem/geos-chem/pull/629 geos-chem PR #629]


|-valign="top"
|-valign="top"
|Improve carbon & nitrogen conservation in reactions
|Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3)
|Kelvin Bates (Harvard)
|Tia Scarpelli (Carbon Mapper)<br>Melissa Sulprizio (Harvard)
|Chemistry
|Emissions
|
|
|


|-valign="top"
|-valign="top"
|Blowing snow sea salt in TOMAS
|FRP-based fire emissions for eastern US at 0.2 (2019-2020)
|Betty Croft (Dalhousie)
|Chris Holmes (FSU)
|Aerosols
|Emissions
|Not delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/2388 geos-chem issue #2388]


|-valign="top"
|-valign="top"
|Geologic short-chain alkanes
|China agriculture NH3 emissions
|Matthew R. (York)
|Amos Tai (CUHK)
|Emissions
|Emissions
|Not delivered
|
|


|-valign="top"
|-valign="top"
|New version of CEDS at 0.1 deg
|T-dependent anthropogenic VOCs
|Emma Knowland (NASA)
|May Fu (SUSTech)
|Emissions
|Emissions
|Not delivered
|
|
*Option. Requires processing existing anthropogenic VOC emissions to generate offline emissions to read in. Parameterised for China.


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/550 MEIC (China regional) for 2000-2017 at 0.5x0.625 deg]
|New source functions for transport tracers beryllium-7 and beryllium-10
|Shixian Zhai (Harvard)
|Minjie Zheng (ETH)
|Emissions
|Emissions
|Delivered<br>June 2024
|
|
* Need permission from Qiang Zhang (Tsinghua U.) to distribute data
*Available at https://zenodo.org/records/8372652


|-valign="top"
|-valign="top"
|KORUS-AQ emissions for East Asia
|LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100
|Katie Travis (NASA)
|Yang Li (Baylor U)<br>Loretta Mickley (Harvard)
|Emissions
|Emissions
|Delivered
|
|
* Need permission to distribute data
*Data involves many files- need to think about temporal frequency


|-valign="top"
|-valign="top"
|[https://pubs.rsc.org/en/content/articlehtml/2022/em/d2em00032f Improvements in modelled Hg0 dry deposition to land]
|Hg geogenic emissions (volcanic, rock weathering)
|Ari Feinberg (MIT)<br>Noelle Selin (MIT)<br>Thandolwethu Dlamini (MIT)<br>Martin Jiskra (UBasel)<br>Viral Shah (Harvard)
|Eric Roy (MIT)
|Hg simulation
|Emissions
|Not delivered
|
|
* The study is already published and could be incorporated into the standard model as a default. Some tweaking to the reduction rate may be required as the model halogen oxidation has also been updated in v13.4.
*[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"
|[https://pubs.rsc.org/en/content/articlelanding/2022/EM/D2EM00019A Australian anthropogenic Hg emissions]
|Hg biomass burning - FINN2.5 & GFED4
|Stephen MacFarlane (UOW)<br>Jenny Fisher (UOW)<br> Hannah Horowitz (U. Illinois)<br>Viral Shah (Harvard)
|Eric Roy (MIT)
|Hg simulation
|Emissions
|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"
|WRF-GC Hg simulation
|BCC-GC online
|Xiaotian Xu (Nanjing U.)<br>Yanxu Zhang (Nanjing U.)
|Lin Zhang (PKU)
|Hg simulation<br>WRF-GC
|External Model
|Not delivered
|
|


|-valign="top"
|-valign="top"
|Updated HgII gas-partical partitioning
|GC-YIBS with online fire emissions
|Kaiyun Liu (Tsinghua U.)<br>Qingru Wu (Tsinghua U.)<br>Shuxiao Wang (Tsinghua U.)
|Xu Yue (NUIST)<br>Hong Liao (NUIST)
|Hg simulation
|External Model
|Not delivered
|
|
* Should be option, not default


|-valign="top"
|-valign="top"
|Dry deposition to F90 (readability)
|GISS-GC offline (GCAP)
|Chris Holmes (FSU)
|Lee Murray (Rochester)
|Dry deposition
|GCAP
|Not delivered
|
|


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!width="100px"|Model scope
!width="100px"|Model scope
!width="420px"|Notes and References
!width="420px"|Notes and References


|-valign="top"
|-valign="top"
|DMS Chemistry
|Fixes to stratospheric aerosol settling
|Linia Tashmim (UC Riverside)<br>William Porter (UC Riverside)
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|Chemistry
|Aerosols
|
|


|-valign="top"
|-valign="top"
|PPN+hv, PPN+OH
|DMS chemistry in v14
|Robert Ryan (UCL)
|Linia Tashmim (UCR)<br>Will Porter (UCR)
|Chemistry
|Chemistry
|
|


|-valign="top"
|-valign="top"
|MBO
|NO2+OH+H2O kinetics
|Michael Vermeuel (UMN)
|Mat Evans (York)
|Chemistry
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Nitrate photolysis
|Use LSODE or Backward Euler integrator in KPP for faster kinetics
|Viral Shah (NASA GMAO)
|Bob Yantosca (Harvard)
|Chemistry
|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"
|[https://github.com/geoschem/geos-chem/issues/1094 Stratospheric adjustment with RRTMG in GEOS-Chem]
|Load balancing in chemistry solver (GCHP)
|Seb Eastham (MIT)
|Zhouran Sun (WashU)
|Science
|Chemistry +<br>Performance
|
|


|-valign="top"
|-valign="top"
|Re-binning of off-line sea salt and dust for use in TOMAS
|Active chemistry in mesosphere for both GCHP and GCClassic
|Betty Croft (Dalhousie)
|Helena McDonald (MIT)<br>Sebastian Eastham (ICL)
|Aerosols
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Adaption of TOMAS' in-cloud aqueous sulfate production for KPP versus sulfate_mod.F90
|Updated aromatic oxidation
|Betty Croft (Dalhousie)
|Stephen MacFarlane (Wollongong)<br>Jenny Fisher (Wollongong)
|Aerosols
|Chemistry
|
|


|-valign="top"
|-valign="top"
|ML algorithms for bulk aerosols
|MCO3 uptake by cloud forming MP; leading to lower PAN
|Arshad Nair (SUNY Albany)<br>Fangqun Yu (SUNY Albany)
|Laura Yang (Harvard)
|Aerosols
|Chemistry
|
|


|-valign="top"
|-valign="top"
|PM2.5 and PM10 calculations: aerodynamic vs geometric diameters
|Implement isotope simulation for CH4 in the carbon simulation
|Shixian Zhai (Harvard)
|Lee Murray (Rochester)
|Aerosols
|Chemistry
|
|
*Will have to change negative emissions from soil to a first-order loss process


|-valign="top"
|-valign="top"
|Updates to Hodzic SOA scheme
|Documentation for adding additional aerosol species
|Jared Brewer (Harvard)
|Connor Barker (UCL)
|Aerosols
|Documentation
|
|


|-valign="top"
|-valign="top"
|Automated reduction in isoprene scheme
|Column diagnostics
|Dan Westervelt (Lamont-Doherty)
|Lizzie Lundgren (Harvard)<br>Viral Shah (GMAO)
|Aerosols
|Diagnostics
|
|


|-valign="top"
|-valign="top"
|Brown carbon chemsitry
|TOMAS rate diagnostics -- improve performance
|Jingqiu Mao (U. Alaska)<br>Xuan Wang (CUHK)
|Betty Croft (WashU/Dal)
|Aerosols
|Diagnostics +<br>Performance
|
|


|-valign="top"
|-valign="top"
|GEOS resolution and subgrid convection - Part 2 RAS parameter tuning
|Archive gamma values from heterogeneous chemistry
|Tailong He (Toronto)<br>Dylan Jones (Toronto)<br>Andrea Molod (NASA GMAO)
|Bob Yantosca (Harvard)
|Convection
|Diagnostics
|
|


|-valign="top"
|-valign="top"
|Update surface methane boundary condition using NOAA flask data
|RRTMG Documentation
|Lee Murray (Rochester)
|GCST
|Input data
|Documentation
|
|


|-valign="top"
|-valign="top"
|Provide recommended rather than hard-coded scaling factors for online emissions
|Canopy Physics Model
|Melissa Sulprizio (Harvard)
|Sam Silva (MIT)
|Emissions
|Dry Deposition
|
|
*Available at https://zenodo.org/records/3614062#.XzvrH5NKjOR (GEOS-Chem 12.3.0)


|-valign="top"
|-valign="top"
|High-res top-down TROPOMI-derived seasonal mean NOx emissions for China
|Dry deposition diagnostics by land cover
|Jintai Lin (PKU)
|Holly Nowell (FSU)<br>Chris Holmes (FSU)
|Emissions
|Dry Deposition
|
|


|-valign="top"
|-valign="top"
|Updated biomass burning emission factors and species
|Dry deposition process diagnostics
|Tess Carter (MIT)
|Holly Nowell (FSU)<br>Chris Holmes (FSU)
|Emissions
|Dry Deposition
|
|


|-valign="top"
|-valign="top"
|Updated offline sea salt emissions
|Biomass burning for TOMAS
|Hongjian Weng (PKU)
|Nicole June (CSU)
|Emissions
|Emissions +<br>Microphysics
|
|


|-valign="top"
|-valign="top"
|HgII deposition too high in 13.4; Hg0 conc too low; should not use as is
|Historic biomass burning (1750-2010)
|Viral Shah (NASA GMAO)<br>Yanxu Zhang (Nanjing U.)<br>Ari Feinberg (MIT)
|Pengfei Liu (Georgia Tech)
|Hg simulation
|Emissions
|
|


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2569/2020/ Canopy Physics Model]
|New prior CO2 biospheric fluxes from CMS-FLUX and GMAO
|Sam Silva (MIT)
|Kevin Bowman (JPL)<br>Lesley Ott (GMAO)
|Emissions &<br>Science
|Emissions
|
|
*DOI: [https://zenodo.org/record/3614062#.XzvrH5NKjOR 10.5281/zenodo.3614062]
*GMAO can provide high-resolution  fluxes (as high as 12 km)
*Needs to be updated to a more recent GEOS-Chem version


|-valign="top"
|-valign="top"
|Python code for processing satellite output to produce column fields using averaging kernels
|Snowpack Br2 emission
|Hannah Nesser (Harvard)<br>Elise Penn (Harvard)
|Chris Holmes (FSU)
|Post-processing
|Emissions
|
|


|-valign="top"
|-valign="top"
|Derived products from a shapefile database for oil and gas infrastructure in North America
|EDGAR v8.1_toxHg emissions for 1970-2022
|Lee Murray (Rochester)
|Eric Roy (MIT)
|Post-processing
|Emissions
|
|


|-valign="top"
|-valign="top"
|Gridded EPA (GEPA) version 2 emissions for 2012-2018
|Improve pressure handling in GCHP advection
|Bram Maasakkers (SRON)<br>Erin McDuffie (WashU),<br>Melissa Sulprizio (Harvard)
|Yuanjian Zhang (WashU)<br>Seb Eastham (ICL)
|Emissions<br>CH4 simulation
|GCHP
|
|


|-valign="top"
|-valign="top"
|Reduce dimension of analytical inversion
|Add error trap for duplicate scale factors in HEMCO
|Hannah Nesser (Harvard)
|Adjoint capability
|
 
|-valign="top"
|Retire all BPCH diagnostics
|Bob Yantosca (Harvard)
|Bob Yantosca (Harvard)
|Diagnostics
|HEMCO
|
|


|-valign="top"
|-valign="top"
|GEOS-Chem in CESM 2.3
|Integration testing: Add stretched grid
|Lizzie Lundgren (Harvard)
|Lizzie Lundgren (Harvard)
|Interfacing with ESMs
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Assess memory leak in GCHP
|Integration testing: Add GCHP mass flux run
|Liam Bindle (WashU)<br>Killian Murphy (York)
|Lizzie Lundgren (Harvard)
|Model performance
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Point to internal state for species mixing ratios in GCHP and GEOS
|Integration testing: Reinstate TOMAS40
|Lizzie Lundgren (Harvard)<br>Christoph Keller (NASA)
|Betty Croft (Dalhousie/WashU)
|Structural
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Assess precision in GCHP internal state - use R4 for some?
|Continue cleanup of C-preprocessor switches
|Lizzie Lundgren (Harvard)
|Lizzie Lundgren (Harvard)
|Structural
|Structural
Line 522: Line 477:


|-valign="top"
|-valign="top"
|Hybrid MPI-OpenMP in GCHP
|Updates to Luo deposition scheme
|Seb Eastham (MIT)<br>Killian Murphy (York)
|Gan Luo (Albany)
|Model performance
|Wet Deposition
|
|
*New version, keep as switch (not default)


|-valign="top"
|-valign="top"
|Convert HEMCO input files to YAML
|Testing the use of a new scavenging parameterization developed by Luo and Yu for cold cloud with Pb-210 aerosol tracer
|Melissa Sulprizio (Harvard)
|Gan Luo (Albany)<br>Fangqun Yu (Albany)
|Structural
|Wet Deposition
|
 
|-valign="top"
|Allow easy disabling of HEMCO emissions for testing
|Melissa Sulprizio (Harvard)
|Structural
|
 
|-valign="top"
|Improve run directory templating and creation with init_rd.sh and shared directories
|Liam Bindle (WashU)
|Run directories
|
 
|-valign="top"
|Expand SpeciesConc diagnostic unit options and rename
|Melissa Sulprizio (Harvard)
|Diagnostics
|
 
|-valign="top"
|Incorporate tools for generating input files for Fast-J/Cloud-J and planeflight
|Jared Brewer (Harvard)
|Post-processing
|
 
|-valign="top"
|Table of CTM and online GCM properties: GCHP, GCC, GEOS-CTM, GC-Nested, online GEOS, GEOS-replay, etc
|GCST?
|Documentation
|
|


Line 577: Line 503:


|-valign="top"
|-valign="top"
|Snow / Icy Bromine
|ML algorithms for bulk aerosol
|Becky Alexander (UW)<br>William Swanson (U. Alaska)<br>Shuting Zhai (UW)
|Arshad Nair (Albany)<br>Fangqun Yu (Albany)
|Chemistry
|Aerosols
|
|


|-valign="top"
|-valign="top"
|Monoterpene oxidation scheme
|Heterogeneous sulfate chemistry
|Jessica Haskins (MIT)
|Katie Travis (NASA)
|Chemistry
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Fire related VOCs including furans
|H2 as an active species
|Lu Hu (UMT)<br>Lixu Jin (UMT)
|Seb Eastham (ICL)
|Chemistry
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Extension of UCX into the mesosphere
|HCN, acetonitrile as fire tracers
|Seb Eastham (MIT)<br>Eric Fleming (NASA)
|Kevin Bates (CU Boulder)
|Chemistry
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Methane flux ingestion
|Implement ethane in carbon simulation
|Eloise Marais (UCL)
|Yuzhong Zhang (Westlake)
|Chemistry
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Parameterized effective radius
|Mesospheric source of CO
|Haihui Zhu (WashU)
|Dylan Jones (UofT)<br>Pam Wales (NASA GSFC)
|Aerosols
|Emissions
|
|


|-valign="top"
|-valign="top"
|Dust non-sphericity impacts on surface chem and optical properties
|Drought-stress algorithm
|Inderjeet Singh (WashU)
|Wei Li (Houston)
|Aerosols
|Emissions
|
|


|-valign="top"
|-valign="top"
|Size-resolved stratospheric aerosol
|Physically-based resolution correction for BVOC emissions using MEGAN
|Seb Eastham (MIT)
|May Fu (SUSTech)
|Aerosols
|Emissions
|
|


|-valign="top"
|-valign="top"
|Extend aerosol settling
|Canadian forest fire prediction system (Canada government forecast model)
|Eloise Marais (UCL)
|Robin Stevens (Montreal)
|Aerosols
|Emissions
|
|


|-valign="top"
|-valign="top"
|Stratospheric aerosol APM
|Cooking emissions (not biofuel)
|Fangqun Yu (SUNY)
|Kelvin Bates (CU Boulder)
|Aerosols
|Emissions
|
|


|-valign="top"
|-valign="top"
|Plume-in-grid model
|State-specific annual emissions scaling factors (US) (1990-2021)
|Hongwei Sun (Harvard)
|Ishir Dutta (MIT)
|Chemistry
|Emissions
|
|


|-valign="top"
|-valign="top"
|Updated lightning NOx: Prescribe from ground and geostationary lightning flashes
|GISS-GC online
|Lee Murray (Rochester)
|Lee Murray (Rochester)
|Emissions
|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"
|-valign="top"
|Seb aircraft emissions beyond recent 2019 update
|Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone
|Seb Eastham (MIT)
|Bob Yantosca (Harvard)
|Emissions
|Performance
|
|


|-valign="top"
|-valign="top"
|FRP-based fire emsisions for eastern US at 0.2 deg
|Photophysical oxidation of aldehydes
|Charlie Fite (FSU)
|Paulo Sebastianelli (Wollongong)<br>Jenny Fisher (Wollongong)
|Emissions
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Hg iodine chemistry
|DMS updates
|Yiming Fu<br>Yanxu Zhang (Nanjing U.)
|Will Porter (UCR)
|Hg simulation
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Hg simulation in GCHP
|Furans emission and chemistry
|Ari Feinberg (MIT)<br>Lyssa Freese (MIT)
|Lixu Jin (Montana)<br>Lu Hu (Montana)
|Hg simulation
|Chemistry + <br>Emissions
|
|


|-valign="top"
|-valign="top"
|Update Hg ocean and soil boundary conditions for consistency with new chemistry
|Cl2 prodcution from Fe aerosol
|Yanxu Zhang (Nanjing U.)
|Qianjie Chen (HK Poly)<br>Becky Alexander (UW)
|Hg simulation
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Dry deposition diagnostics by land cover
|VCP emissions
|Holly Nowell (FSU)
|Kevin Bates (CU Boulder)
|Diagnostics
|Emissions
|
|


|-valign="top"
|-valign="top"
|Dry deposition process diagnostics
|Bidirectional land-atmosphere exchange for Hg
|Holly Nowell (FSU)
|Yuying Cui (MIT/Tsinghua)
|Diagnostics
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Isotope simulation for CO and CH4 in GCHP
|OH covariances for inversions
|Lee Murray (Rochester)
|Elise Penn (Harvard)
|Carbon simulation
|Inversions
|
|


|-valign="top"
|-valign="top"
|Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3)
|CESM2-GC offline
|Melissa Sulprizio (Harvard)<br>Tia Scarpelli (U. Edinburgh)<br>Zichong Chen (Harvard)
|Seb Eastham (ICL)<br>Lee Murray (Rochester)
|Emissions<br>CH4 simulation
|Met fields
|
|


|-valign="top"
|-valign="top"
|CHEEREIO EnKF
|Re-binning of off-line sea salt and dust for TOMAS
|Drew Pendergrass (Harvard)
|Betty Croft (Dalhousie)
|Adjoint capabilities
|Microphysics
|
|


|-valign="top"
|-valign="top"
|Separate mixing and emissions
|TOMAS nucleation updates
|Bob Yantosca (Harvard)
|Sam O'Donnell (CSU)
|Structural
|Microphysics
|
|


|-valign="top"
|-valign="top"
|Modularization of aerosols code for interface with GOCART in GEOS
|Stratospheric aerosol APM
|Christoph Keller (GMAO)
|Fangqun Yu (SUNY Albany)
|Structural
|Microphysics
|
|


|-valign="top"
|-valign="top"
|Migrating simple SOA formation from carbon_mod.F90 into the KPP "full-chemistry" mechanism
|Transition from MERRA-2 to GEOS-IT for benchmarking
|Bob Yantosca (Harvard)
|Yuanjian Zhang (WashU)
|Structural
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Improve load balancing in GCHP
|Automate integration testing on AWS
|Seb Eastham (MIT)
|Yidan Tang (WashU)
|Model performance
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Update to MAPL 3 in GCHP, including replacement of ExtData.rc with YAML file
|Integration testing: Add across end of year run
|Lizzie Lundgren (Harvard)
|GCST
|Structural
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone
|Integration testing: Add GEOS-IT
|Bob Yantosca (Harvard)
|Yuanjian Zhang (WashU)
|Model performance
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Limit allocation of State_Met to what is needed per simulation
|Separate mixing, emissions, and drydep
|Melissa Sulprizio (Harvard)
|Yuanjian Zhang (WashU)
|Structural
|Structural
|
|


|-valign="top"
|-valign="top"
|Make frequency of HEMCO restart file configurable
|Intel IFX compiler
|Melissa Sulprizio (Harvard)
|Bob Yantosca (Harvard)
|Diagnostics
|Structural
|
|


|-valign="top"
|-valign="top"
|Apply masks/scaling in HEMCO based on input category or flag
|CMake option to only build libraries but not executable, also passing C-preprocessor statements to turn off code
|Melissa Sulprizio (Harvard)
|Bob Yantosca (Harvard)<br>Lee Murray (Rochester)
|Structural
|Structural
|
|


|-valign="top"
|-valign="top"
|Testing the use of monthly mean MERRA-2 CWC with Pb-210 aerosol tracer
|Remove differences introduced when breaking up GC-Classic runs in time; and flexible precision in HEMCO
|Bo Zhang (NIA)<br>Hongyu Liu (NIA / NASA Langley)
|Lizzie Lundgren (Harvard)
|Transport
|Structural
|
|


|-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
|Limit allocation of State_Met to what is needed per simulation
|Gan Luo (SUNY Albany)<br>Fangqun Yu (SUNY-Albany)
|Melissa Sulprizio (Harvard)
|Transport
|Structural
|
|


|-valign="top"
|-valign="top"
|Evaluate vertical mixing in GEOS-Chem with model-model and model-observation comparisons
|Using 3-D precipitation fluxes to calculate precipitation formation and re-evaporation in scavenging (to be consistent with GEOS/GOCART & ground precipitation)
|Seb Eastham (MIT)<br>Clara Orbe (NASA GISS)<br>Andrew Schuh (CSU)
|Gan Luo (Albany)<br>Hongyu Liu (NIA/LaRC)<br>Bo Zhang (NIA/LaRC)
|Transport
|Wet deposition
|
|


Line 794: Line 750:


|-valign="top"
|-valign="top"
|Updates to Aromatic chemistry
|Modal aerosol model (MAM7) in GCHP
|Stephen MacFarlane (UOW)<br>Jenny Fisher (UOW)
|Shreya Sharma (MIT)
|Aerosols
|
 
|-valign="top"
|Online OCIM ocean biogeochemistry
|Lee Murray (Rochester)<br>Hannah Horowitz (UIUC)<br>Chris Holmes (FSU)
|Chemistry
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Nitrate photolysis
|Perchlorate chemistry
|Mat Evans (York)<br>Thomas Sherwen (York)<br>Matthew Rowlinson (York)
|Yuk Chun Chan (UW)
|Chemistry
|Chemistry
|
|


|-valign="top"
|-valign="top"
|In aerosol chemistry Halogens
|Non-stomatal dry deposition (2-layer canopy model)
|Mat Evans (York)<br>Hansen Cao (CU Boulder)
|Michael Vermeuel (Purdue)
|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
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Benchmark box model of GC Chemistry
|Glyoxal updates from isoprene
|Katie Travis (NASA)
|Tzung-May Fu (SUSTech)
|Chemistry
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Alkyl nitrates Alk7, PHAN
|Iodine chemistry
|Katie Travis (NASA)
|Becky Alexander (UW)<br>Xuan Wang (CUHK)
|Chemistry
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Add stratospheric ozone species to full-chemistry simulations
|GFED5 biomass burning
|Lee Murray (Rochester)
|Eric Roy (MIT)
|Chemistry
|Emissions
|
|


|-valign="top"
|-valign="top"
|Perchlorate chemistry
|Ocean Hg surface concentrations for 2010-2020 from multi-model ensemble
|Yuk Chun Chan (UWAB)
|Eric Roy (MIT)<br>Ari Feinberg (IQF-CSIC)
|Chemistry
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Explicit heterogeneous sulfate chemistry
|Soil Hg emissions 2010-2020
|Katie Travis (NASA)<br>Becky Alexander (UT)
|Eric Roy (MIT)<br>Ari Feinberg (IQF-CSIC)
|Chemistry
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|ISORROPIA-lite
|Air-sea exchange parameterization
|Becky Alexander (UW)
|Eric Roy (MIT)
|Aerosols
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|HOx and ozone "emissions" from lightning as option in model to play with
|Soil Hg emissions parameterization
|Jingqiu (Alaska)<br>Lee Murray (Rochester)
|Ari Feinberg (IQF-CSIC)
|Emissions
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Sea salt aerosol from sea ice leads
|Sea salt uptake of GOM
|Hannah Horowitz (U. Illinois)
|Eric Roy (MIT)
|Emissions
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Drought-stress algorithm
|Photoreduction rate constant
|Wei Li (U. Houston)
|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
|
|


|-valign="top"
|-valign="top"
|Biomass burning injection height profiles
|Hg simulation in GCHP
|Inderjeet Singh (WashU)
|Eric Roy (MIT)
|Emissions
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|OCIM integration
|OCIM - biogeochemical model - (C/P/N/Fe - no Hg yet) (MATLAB)
|Chris Holmes (FSU)<br>Lee Murray (Rochester)
|Hannah Horowitz (UIUC)
|Hg simulation
|
|
|-valign="top"
|Possibly updating Hg oxidation chemistry based on Utah field campaigns
|Jessica Haskins (Utah)
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Updating landcover products in GEOS-Chem
|New halogen/aerosol fields (surface area / AOD) from 10-year 14.4 benchmark simulation available online
|Chris Holmes (FSU)<br>Jeff Geddes (BU)
|Viral Shah (NASA GMAO); Eric Roy (MIT); Ari Feinberg (IQF-CSIC)
|Input data
|Input data
|
|


|-valign="top"
|-valign="top"
|Dry deposition physical improvement
|Extend IMI to CO2 (ICI)
|Chris Holmes (FSU)
|Hannah Nesser (JPL)
|Dry deposition
|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"
|-valign="top"
|Extend the IMI system to other trace gases
|PAH - update from version 11
|Lucas Estrada (Harvard)
|Lexia Cicone (MIT)
|Adjoint capabilities
|POPs simulation
|
|


|-valign="top"
|Species database more accessible; doc updates; TOL discussion
|Jessica Haskins (Utah)
|Structural
|


|-valign="top"
|-valign="top"
|TOMAS WRF-GC in regional Thailand simulation
|Stretched-grid plotting in GCPy
|Win Trivitayanurak (Chulalongkorn U)
|Killian Murphy (York)
|Aerosols
|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 17:26, 27 January 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
  • Slated for 14.6.0
  • HEMCO PR #279
  • NOTE: WashU will recompute mass tuning factors for each met field & resolution (GCClassic)
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
Add run directory creation support for processed cubed-sphere GEOS-IT meteorology Yuanjian Zhang (WashU) GCHP Simple
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)
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
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
  • 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
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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