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 14.5.0]]'''


|}
|}
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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.  


{| border=1 cellspacing=0 cellpadding=5  
{| border=1 cellspacing=0 cellpadding=5  
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|-valign="top"
|-valign="top"
|[https://github.com/geoschem/GCHP/pull/214 Upgrade GMAO libraries in GCHP]
|[https://github.com/geoschem/geos-chem/issues/1288 New soil NOx parameterization]
|Liam Bindle (GCST) <br> Lizzie Lundgren (GCST)
|Yi Wang (U. Iowa)<br>Jun Wang (U. Iowa)
|Structural
|Emissions
|Easy
|Medium
|
|
*Done, slated for 14.0.0
*[https://github.com/geoschem/geos-chem/issues/1288 geos-chem issue #1288]
*Incorporates new met field TSOIL1
 
|}
 
== Prioritized and in the queue ==
 
Features listed in this table are prioritized for integration into GEOS-Chem in the near future.
 
{| border=1 cellspacing=0 cellpadding=5
|-bgcolor="#CCCCCC"
!width="200px"|Feature
!width="200px"|Contributor(s)
!width="100px"|Model scope
!width="100px"|Ease of implementation
!width="100px"|Delivery status
!width="300px"|Notes and References


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/pull/1198 Fixes to remove differences when restarting the model]
|ALK4 & R4N2 chemistry
|Lizzie Lundgren (GCST)
|Jared Brewer (UMN)
|Bug fixes
|Chemistry
|Medium
|TBD
|Not delivered
|
|
*Done for GCHP, slated for 14.0.0
*[https://github.com/geoschem/geos-chem/issues/1625 geos-chem issue #1625]
*Problem of REAL4 restart file for GC-Classic will remain
*[https://acmg.seas.harvard.edu/files/acmg/files/brewer2022.pdf Brewer, J.F. et al., J. Geophys. Res., 2023.]


|-valign="top"
|-valign="top"
|[https://acp.copernicus.org/articles/19/7055/2019/ Joint CO2-CO-CH4-OCS simulation]
|Mass flux regridding fix in MAPL
|Beata Bukosa (NIWA)<br>Kevin Bowman (JPL)<br>Mike Long (Harvard)
|Tom Clune (GMAO)<br>Seb Eastham (MIT)
|Specialty simulation
|GCHP input regridding
|Medium
|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 (GCST)
|Emissions
|Easy
|
|
*[https://github.com/geoschem/GCHP/issues/377 GCHP Issue #377]
*'''Currently on hold, as the submitted update results in zero diff'''


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/655 Climatologies for lightning NOx]
|New version of CEDS at 0.1 deg
|Lee Murray (Rochester)<br>Melissa Sulprizio (GCST)
|Dandan Zhang (WashU)
|Emissions
|Emissions
|Easy
|Simple
|Delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/1745 geos-chem issue #1745]
*'''Currently on hold while an issue with seasonality in the new CEDS data is being investigated by the authors.'''


|-valign="top"
|-valign="top"
|[[Grid-independent_emissions|Updated offline biogenic emissions]]
|Remove differences in GC-Classic due to HEMCO reading REAL8 restart as REAL4
|Hongjian Weng (PKU)
|Lizzie Lundgren (Harvard)
|Emissions
|GC-Classic
|Easy
|Medium
|
|
*Delivered to GCST (Dec 2021)
|-valign="top"
|[[Grid-independent_emissions|Updated offline soil NOx emissions]]
|Hongjian Weng (PKU)
|Emissions
|Easy
|
|
*Delivered to GCST (Dec 2021)
*[https://github.com/geoschem/HEMCO/issues/18 hemco issue #18]


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/discussions/1022 Add new species concentration diagnostic in units of molec/cm3]
|Capture all trop and PBL height changes in budget diagnostics
|GCST
|Chris Holmes (FSU)<br>Lizzie Lundgren (Harvard)
|Diagnostics
|Diagnostics
|Easy
|Medium
|
|Delivered
*See [https://github.com/geoschem/geos-chem/issues/1022 geoschem/geos-chem #1022]
 
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/770 Output satellite diagnostics as NetCDF]
|Eloise Marais (UCL)
|Diagnostics
|Easy
|
|
*See [https://github.com/geoschem/geos-chem/pull/1134 geoschem/geos-chem #1134]
*[https://github.com/geoschem/geos-chem/pull/2103 geos-chem PR 2103]
 
|-valign="top"
|Upgrade Fast-JX to Cloud-J
|Lizzie Lundgren (GCST)
|Structural
|Difficult
|
* [https://github.com/geoschem/cloud-j geoschem/cloud-j]
*Ongoing


|}
|}


== Feature integration in the queue ==
== Ready to go in ==


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


{| border=1 cellspacing=0 cellpadding=5  
{| border=1 cellspacing=0 cellpadding=5  
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!width="200px"|Contributor(s)
!width="200px"|Contributor(s)
!width="100px"|Model scope
!width="100px"|Model scope
!width="100px"|Ease of implementation
!width="100px"|Delivery status
!width="300px"|Notes and References
!width="300px"|Notes and References


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2475/2020/gmd-13-2475-2020.pdf Adaptive chemical solver] (as option)
|KORUS-AQ emissions for East Asia (as an option)
|Mike Long (Harvard) <br> Haipeng Lin (Harvard) <br> Bob Yantosca (GCST) <br> Lu Shen (PKU)
|Katie Travis (NASA)
|Chemistry
|Emissions
|Difficult
|Simple
|
|
*In testing, publication expected in mid-to-late 2022
*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"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2569/2020/ MEGAN3]
|Geologic emission of ethane and propane
|Sam Silva (MIT)
|Matthew Rowlinson and Mat Evans(York)
|Emissions
|Emissions
|Medium
|Delivered<br>Jan 2023
|
|
*DOI: [https://zenodo.org/record/3614062#.XzvrH5NKjOR 10.5281/zenodo.3614062]
*Global source from https://doi.org/10.1038/s41561-018-0073-0 with spatial distribution from https://doi.org/10.5194/essd-11-1-2019
*Sam Silva and GCST will work on updating this to a more recent GEOS-Chem version in the near future


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2569/2020/ Canopy Physics Model]
|[https://github.com/geoschem/geos-chem/pull/629 Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange]
|Sam Silva (MIT)
|Joey Lam(CUHK)<br>Amos Tai (CUHK)
|Emissions &<br>Science
|Science
|Medium
|Delivered<br>Feb 2021
|
|
*DOI: [https://zenodo.org/record/3614062#.XzvrH5NKjOR 10.5281/zenodo.3614062]
*[https://github.com/geoschem/geos-chem/pull/629 geos-chem PR #629]
*Sam Silva and GCST will work on updating this to a more recent GEOS-Chem version in the near future


|}
|-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
|Delivered<br>Jul 2021
|
*Data involves many files- need to think about temporal frequency


== Feature integration not yet prioritized ==
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/1867 Online H2 chemistry]
|Maria Paula Pérez-Peña (UNSW)<br>Jenny Fisher (UOW)<br>Dylan Millet (UMN)
|Chemistry
|Delivered<br>June 2023
|
*[https://acp.copernicus.org/articles/22/12367/2022/acp-22-12367-2022.html Pérez-Peña, M.P. et al., ACP, 2022.]
*Implemented in v12.5, needs to be brought up to current version


Features listed in this table have been delivered to the GEOS-Chem Support Team but are not yet prioritized for integrating into the model.
|-valign="top"
|DMS Chemistry
|Linia Tashmim (UC Riverside)<br>William Porter (UC Riverside)
|Chemistry
|Not delivered
|


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|-bgcolor="#CCCCCC"
|Organic acids (RCOOH)
!width="200px"|Feature
|Katie Travis (NASA)
!width="200px"|Contributor(s)
|Chemistry
!width="100px"|Model scope
|Not delivered
!width="100px"|Ease of implementation
|
!width="300px"|Notes and References


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/1094 Stratospheric adjustment with RRTMG in GEOS-Chem]
|Improve carbon & nitrogen conservation in reactions
|Seb Eastham (MIT)
|Kelvin Bates (Harvard)
|Science
|Chemistry
|Medium
|Not delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/1094 geoschem/geos-chem #1094]


|-valign="top"
|-valign="top"
|[https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2006GL026015 Stratospheric HCN chemistry]
|Blowing snow sea salt in TOMAS
|Armin Kleinbohl (JPL)<br>Debra Weisenstein (Harvard, retired)
|Betty Croft (Dalhousie)
|Chemistry
|Aerosols
|Medium
|Not delivered
|
|
*Delivered to GCST (Jun 2020)


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/1137/2020/ GC-YIBs biosphere-atmospheric chemistry coupled model]
|[https://pubs.rsc.org/en/content/articlelanding/2022/EM/D2EM00019A Australian anthropogenic Hg emissions]
|Xu Yue (NUIST)
|Stephen MacFarlane (UOW)<br>Jenny Fisher (UOW)<br> Hannah Horowitz (U. Illinois)<br>Viral Shah (Harvard)
|Science
|Hg simulation
|Easy
|Not delivered
|
|
* [https://github.com/geoschem/geos-chem/issues/425 geoschem/geos-chem #425]


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/pull/629 Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange]
|WRF-GC Hg simulation
|Joey Lam(CUHK)<br>Amos Tai (CUHK)
|Xiaotian Xu (Nanjing U.)<br>Yanxu Zhang (Nanjing U.)
|Science
|Hg simulation<br>WRF-GC
|Easy
|Not delivered
|
|
*Delivered to GCST (Feb 2021)
* [https://github.com/geoschem/geos-chem/pull/629 geoschem/geos-chem #629]


|-valign="top"
|-valign="top"
|[[Stratospheric_chemistry#Treatment_of_the_mesosphere_in_UCX_simulations|Extend UCX into the mesosphere]]
|Updated HgII gas-partical partitioning
|Sebastian Eastham (MIT)<br>Eric Fleming (NASA GMAO)
|Kaiyun Liu (Tsinghua U.)<br>Qingru Wu (Tsinghua U.)<br>Shuxiao Wang (Tsinghua U.)
|Chemistry
|Hg simulation
|Easy
|Not delivered
|
|
*Should be option, not default


|-valign="top"
|-valign="top"
|Landcover/Fire Emissions Offline LPJlmfire
|Dry deposition to F90 (readability)
|Loretta Mickley (Harvard)<br>Yang Li (Harvard)
|Chris Holmes (FSU)
|Emissions
|Dry deposition
|Easy
|Not delivered
|
|
*Data files delivered to GCST (July 2021)


|}
|}
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|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/559 Implement H2 chemistry in UCX]
|PPN+hv, PPN+OH
|Chris Holmes (FSU)
|Robert Ryan (UCL)
|Chemistry
|
 
|-valign="top"
|MBO
|Michael Vermeuel (UMN)
|Chemistry
|Chemistry
|
|
*Identified as a priority for GC 13, but not yet delivered


|-valign="top"
|-valign="top"
|[https://iopscience.iop.org/article/10.1088/1748-9326/ac16a3 New soil NOx parameterization]
|Initial conditions for CH4 correcting background and stratospheric biases
|Yi Wang (U. Iowa)<br>Jun Wang (U. Iowa)
|Todd Mooring (Harvard)
|Emissions
|Methane simulation
|
 
|-valign="top"
|Migrating simple SOA formation from carbon_mod.F90 into the KPP "full-chemistry" mechanism
|Bob Yantosca (Harvard)
|Aerosols<br>Structural
|
*Ongoing
 
|-valign="top"
|Re-binning of off-line sea salt and dust for use in TOMAS
|Betty Croft (Dalhousie)
|Aerosols
|
 
|-valign="top"
|Adaption of TOMAS' in-cloud aqueous sulfate production for KPP versus sulfate_mod.F90
|Betty Croft (Dalhousie)
|Aerosols
|
|


|-valign="top"
|-valign="top"
|[[Grid-independent_emissions|Updated offline sea salt emissions]]
|ML algorithms for bulk aerosols
|Hongjian Weng (PKU)
|Arshad Nair (SUNY Albany)<br>Fangqun Yu (SUNY Albany)
|Emissions
|Aerosols
|
|
*Identified as a priority for GC 13, but not yet delivered


|-valign="top"
|-valign="top"
|Provide recommended rather than hard-coded scaling factors for online emissions
|PM2.5 and PM10 calculations: aerodynamic vs geometric diameters
|GCST
|Shixian Zhai (Harvard)
|Emissions
|Aerosols
|
|
*Identified as a priority for GC 13, but not yet developed


|-valign="top"
|-valign="top"
|Add stratospheric ozone species to full-chemistry simulations
|Updates to Hodzic SOA scheme
|Lee Murray (Rochester)
|Jared Brewer (Harvard)
|Chemistry
|Aerosols
|
|


|-valign="top"
|-valign="top"
|Diagnostic to archive XCO2, XCO, and XCH4
|Automated reduction in isoprene scheme
|Dylan Jones (Toronto)
|Dan Westervelt (Lamont-Doherty)
|Diagnostic
|Aerosols
|
|


|-valign="top"
|-valign="top"
|Provide archived TCR-2 GEOS-Chem OH fields for carbon simulations
|Brown carbon chemsitry
|Kazu Miyazaki (JPL)
|Jingqiu Mao (U. Alaska)<br>Xuan Wang (CUHK)
|Input data
|Aerosols
|
|


|-valign="top"
|-valign="top"
|BrC aging
|GEOS resolution and subgrid convection - Part 2 RAS parameter tuning
|Xuan Wang (Harvard)<br>Melanie Hammer(Dalhousie)
|Tailong He (Toronto)<br>Dylan Jones (Toronto)<br>Andrea Molod (NASA GMAO)
|Chemistry
|Convection
|
|


|-valign="top"
|-valign="top"
|Shared Socioeconomic Pathways Emission Inventories
|High-res top-down TROPOMI-derived seasonal mean NOx emissions for China
|Hong Liao (NUIST)
|Jintai Lin (PKU)
|Emissions
|Emissions
|
|
*Horizontal resolution: 5km, temporal resolution: JJA mean
*monthly data will be available at a later stage; please contact us


|-valign="top"
|-valign="top"
|Rediagnosis of RAS convection in GEOS-Chem
|Updated biomass burning emission factors and species
|Tailong He (Toronto)<br>Dylan Jones (Toronto)<br>Andrea Molod (NASA/GMAO)
|Tess Carter (MIT)
|Convection
|Emissions
|
|
*Work is finished and a manuscript is in preparation.


|-valign="top"
|-valign="top"
|HTAPv3 emissions (0.1 deg, 2002-2018)
|Updated offline sea salt emissions
|Emissions & Deposition WG
|Hongjian Weng (PKU) <br> Jintai Lin (PKU)
|Emissions
|Emissions
|
|


|-valign="top"
|-valign="top"
|Migrating simple SOA formation from carbon_mod.F90 into the KPP "full-chemistry" mechanism
|[https://gmd.copernicus.org/articles/13/2569/2020/ Canopy Physics Model]
|GCST
|Sam Silva (MIT)
|Chemistry
|Emissions &<br>Science
|
*DOI: [https://zenodo.org/record/3614062#.XzvrH5NKjOR 10.5281/zenodo.3614062]
*Needs to be updated to a more recent GEOS-Chem version
 
|-valign="top"
|Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone
|Bob Yantosca (Harvard)
|Model performance
|
*Ongoing (will be done as time allows)
 
|-valign="top"
|Assess memory leak in GCHP
|Killian Murphy (York)
|Model performance
|
*NOTE: Most memory leaks in GCHP have been fixed by [https://github.com/geoschem/geos-chem/pull/1353 geoschem/geos-chem PR #1353]. Will wait until MAPL3 to further assess.
 
|-valign="top"
|Hybrid MPI-OpenMP in GCHP
|Seb Eastham (MIT)<br>Killian Murphy (York)
|Model performance
|
|


|-valign="top"
|-valign="top"
|Updated parameterization of aerosol size distribution for bulk aerosol simulations
|Improve pressure handling in GCHP advection
|Haihui Zhu (WashU)<br>Shixian Zhai (Harvard)
|Seb Eastham (MIT)<br>Yuanjian Zhang (WashU)
|Aerosols
|GCHP
|
|
|-valign="top"
|Use ExtData2G as default GCHP input module
|Lizzie Lundgren (Harvard)
|GCHP
|Will replace ExtData.rc with yaml file


|}
|}
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|-valign="top"
|-valign="top"
|Methylethylketone chemistry
|Snow / Icy Bromine
|Jared Brewer (CSU)
|Becky Alexander (UW)<br>William Swanson (U. Alaska)<br>Shuting Zhai (UW)
|Chemistry
|
 
|-valign="top"
|Monoterpene oxidation scheme
|Jessica Haskins (MIT)
|Chemistry
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Add sulfate dependence to SOA yield from isoprene in simple SOA
|Fire related VOCs including furans
|Lu Hu (UMT)<br>Lixu Jin (UMT)
|Chemistry
|
 
|-valign="top"
|Extension of UCX into the mesosphere
|Seb Eastham (MIT)<br>Eric Fleming (NASA)
|Chemistry
|
 
|-valign="top"
|Methane flux ingestion
|Eloise Marais (UCL)
|Eloise Marais (UCL)
|Chemistry
|Chemistry
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|-valign="top"
|-valign="top"
|GTMM updates
|Dust non-sphericity impacts on surface chem and optical properties
|Ben Geyman (Harvard)
|Inderjeet Singh (WashU)
|Aerosols
|
 
|-valign="top"
|Size-resolved stratospheric aerosol
|Seb Eastham (MIT)
|Aerosols
|
 
|-valign="top"
|Extend aerosol settling
|Eloise Marais (UCL)
|Aerosols
|
 
|-valign="top"
|Stratospheric aerosol APM
|Fangqun Yu (SUNY)
|Aerosols
|
 
|-valign="top"
|Plume-in-grid model
|Hongwei Sun (Harvard)
|Chemistry
|
 
|-valign="top"
|Updated lightning NOx: Prescribe from ground and geostationary lightning flashes
|Lee Murray (Rochester)
|Emissions
|
 
|-valign="top"
|Seb aircraft emissions beyond recent 2019 update
|Seb Eastham (MIT)
|Emissions
|
 
|-valign="top"
|FRP-based fire emsisions for eastern US at 0.2 deg
|Charlie Fite (FSU)
|Emissions
|
 
|-valign="top"
|Hg iodine chemistry
|Yiming Fu<br>Yanxu Zhang (Nanjing U.)
|Hg simulation
|Hg simulation
|
|


|-valign="top"
|Hg simulation in GCHP
|Ari Feinberg (MIT)<br>Lyssa Freese (MIT)
|Hg simulation
|


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/GCHP/issues/19 Integrating GMAO's tracer gridded component in GCHP]
|Update Hg ocean and soil boundary conditions for consistency with new chemistry
|Christoph Keller (NASA GMAO)
|Yanxu Zhang (Nanjing U.)
|Transport Tracer simulation
|Hg simulation
|
 
|-valign="top"
|Dry deposition diagnostics by land cover
|Holly Nowell (FSU)
|Diagnostics
|
 
|-valign="top"
|Dry deposition process diagnostics
|Holly Nowell (FSU)
|Diagnostics
|
 
|-valign="top"
|Isotope simulation for CO and CH4 in GCHP
|Lee Murray (Rochester)
|Carbon simulation
|
 
|-valign="top"
|Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3)
|Melissa Sulprizio (Harvard)<br>Tia Scarpelli (U. Edinburgh)<br>Zichong Chen (Harvard)
|Emissions<br>CH4 simulation
|
 
|-valign="top"
|Modularization of aerosols code for interface with GOCART in GEOS
|Christoph Keller (GMAO)
|Structural
|
 
|-valign="top"
|Improve load balancing in GCHP
|Seb Eastham (MIT)
|Model performance
|
 
|-valign="top"
|Testing the use of monthly mean MERRA-2 CWC with Pb-210 aerosol tracer
|Bo Zhang (NIA)<br>Hongyu Liu (NIA / NASA Langley)
|Transport
|
 
|-valign="top"
|Testing the use of a new scavenging parameterization developed by Luo and Yu for cold cloud with Pb-210 aerosol tracer
|Gan Luo (SUNY Albany)<br>Fangqun Yu (SUNY-Albany)
|Transport
|
 
|-valign="top"
|Evaluate vertical mixing in GEOS-Chem with model-model and model-observation comparisons
|Seb Eastham (MIT)<br>Clara Orbe (NASA GISS)<br>Andrew Schuh (CSU)
|Transport
|
 
|-valign="top"
|MAPL version 3
|Lizzie Lundgren (Harvard)
|GCHP
|Will include History wildcard handling in GCHP
 
 
|-valign="top"
|Migrate benchmark meteorology from MERRA2 to GEOS-IT
|GCST
|Benchmarking
|
|


Line 356: Line 538:


Features listed in this table are in development and will likely be delivered to the GEOS-Chem Support Team in the 12-24 months timeframe.
Features listed in this table are in development and will likely be delivered to the GEOS-Chem Support Team in the 12-24 months timeframe.
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|-valign="top"
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|Implement isotope simulation for CO and CH4 in GCHP
|Updates to Aromatic chemistry
|Lee Murray (Rochester)
|Stephen MacFarlane (UOW)<br>Jenny Fisher (UOW)
|Specialty simulation
|Chemistry
|
 
|-valign="top"
|Nitrate photolysis
|Mat Evans (York)<br>Thomas Sherwen (York)<br>Matthew Rowlinson (York)
|Chemistry
|
 
|-valign="top"
|In aerosol chemistry Halogens
|Mat Evans (York)<br>Hansen Cao (CU Boulder)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Migrate LETFK DA scheme to GCHP
|Benchmark box model of GC Chemistry
|Kazu Miyazaki (JPL)
|Katie Travis (NASA)
|Structural
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Super fast chemistry scheme
|Alkyl nitrates Alk7, PHAN
|Benjamin Brown-Steiner (AER)<br>Makoto Kelp (Harvard)
|Katie Travis (NASA)
|Chemistry
|Chemistry
|
|
*SF mechanism has been implemented and benchmarked in GEOS-Chem 12.0.0. This mechanism is of interest for those groups wanting fast global simulation of oxidation fields in GEOS-Chem simulations focused on aerosol microphysics.
*The machine-learned chemical solver is still probably 12 months away from online implementation into GEOS-Chem.


|-valign="top"
|-valign="top"
|Add non-volatile cations to ISORROPIA
|Add stratospheric ozone species to full-chemistry simulations
|Becky Alexander (UW)
|Lee Murray (Rochester)
|Aerosols
|Chemistry
|
|


|-valign="top"
|-valign="top"
|DMS oxidation scheme updating
|Perchlorate chemistry
|Becky Alexander (UW)<br>Qianjie Chen (UW)
|Yuk Chun Chan (UWAB)
|Chemistry
|Chemistry
|
|
*Delayed - implemented pre-KPP
*Currently bring implemented in KPP by UC Riverside group


|-valign="top"
|-valign="top"
|Heterogeneous sulfate production
|Explicit heterogeneous sulfate chemistry
|Lin Zhang (PKU)<br>Becky Alexander (UW)<br>Yuxuan Wang (U. Houston)
|Katie Travis (NASA)<br>Becky Alexander (UT)
|Chemistry
|Chemistry
|
|
*Delayed - implemented pre-KPP


|-valign="top"
|-valign="top"
|Hg in WRF-GC
|HOx and ozone "emissions" from lightning as option in model to play with
|Yanxu Zhang (Nanjing)
|Jingqiu (Alaska)<br>Lee Murray (Rochester)
|Hg simulation
|Emissions
|
 
|-valign="top"
|Sea salt aerosol from sea ice leads
|Hannah Horowitz (U. Illinois)
|Emissions
|
|


|-valign="top"
|-valign="top"
|Hg with blowing snow
|Drought-stress algorithm
|Yanxu Xhang (Nanjing)
|Wei Li (U. Houston)
|Emissions, Hg simulation
|
|
|


|-valign="top"
|-valign="top"
|Hg isotopes
|Biomass burning injection height profiles
|Xiaotian Xu, Yanxu Xhang (Nanjing)
|Inderjeet Singh (WashU)
|Hg simulation
|Emissions
|
|


|-valign="top"
|-valign="top"
|Hg in CESM CAM-CHEM
|OCIM integration
|Peng Zhang, Yanxu Xhang (Nanjing)
|Chris Holmes (FSU)<br>Lee Murray (Rochester)
|Hg simulation
|
|
|


|-valign="top"
|-valign="top"
|Complex / multicomplex variables
|Updating landcover products in GEOS-Chem
|Shannon Capps (Drexel)
|Chris Holmes (FSU)<br>Jeff Geddes (BU)
|Structural
|Input data
|
|


|}
|-valign="top"
|Dry deposition physical improvement
|Chris Holmes (FSU)
|Dry deposition
|


----------------
|-valign="top"
|TOMAS WRF-GC in regional Thailand simulation
|Win Trivitayanurak (Chulalongkorn U)
|Aerosols
|


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

Revision as of 17:46, 31 May 2024

On this page we list the current priorities for GEOS-Chem development. This list is continuously updated based on code readiness and input from the Working Groups and the Steering Committee. For history of past releases see the GEOS-Chem Versions wiki page.

Merged and awaiting release

See the links below for items merged and awaiting release.

Mergeable at any time Version in development
GEOS-Chem no-diff-to-benchmark GEOS-Chem 14.5.0

Feature integration in progress

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

Feature Contributor(s) Model scope Ease of implementation Notes and References
New soil NOx parameterization Yi Wang (U. Iowa)
Jun Wang (U. Iowa) 		Emissions Medium

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
ALK4 & R4N2 chemistry Jared Brewer (UMN) Chemistry TBD Not delivered
Mass flux regridding fix in MAPL Tom Clune (GMAO)
Seb Eastham (MIT) 		GCHP input regridding Medium
  • GCHP Issue #377
  • Currently on hold, as the submitted update results in zero diff
New version of CEDS at 0.1 deg Dandan Zhang (WashU) Emissions Simple Delivered
  • geos-chem issue #1745
  • Currently on hold while an issue with seasonality in the new CEDS data is being investigated by the authors.
Remove differences in GC-Classic due to HEMCO reading REAL8 restart as REAL4 Lizzie Lundgren (Harvard) GC-Classic Medium
Capture all trop and PBL height changes in budget diagnostics Chris Holmes (FSU)
Lizzie Lundgren (Harvard) 		Diagnostics Medium 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 References
KORUS-AQ emissions for East Asia (as an option) Katie Travis (NASA) Emissions Simple
Geologic emission of ethane and propane Matthew Rowlinson and Mat Evans(York) Emissions Delivered
Jan 2023
Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange Joey Lam(CUHK)
Amos Tai (CUHK) 		Science Delivered
Feb 2021
LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100 Yang Li (Baylor University)
Loretta Mickley (Harvard) 		Emissions Delivered
Jul 2021
  • Data involves many files- need to think about temporal frequency
Online H2 chemistry Maria Paula Pérez-Peña (UNSW)
Jenny Fisher (UOW)
Dylan Millet (UMN) 		Chemistry Delivered
June 2023
DMS Chemistry Linia Tashmim (UC Riverside)
William Porter (UC Riverside) 		Chemistry Not delivered
Organic acids (RCOOH) Katie Travis (NASA) Chemistry Not delivered
Improve carbon & nitrogen conservation in reactions Kelvin Bates (Harvard) Chemistry Not delivered
Blowing snow sea salt in TOMAS Betty Croft (Dalhousie) Aerosols Not delivered
Australian anthropogenic Hg emissions Stephen MacFarlane (UOW)
Jenny Fisher (UOW)
Hannah Horowitz (U. Illinois)
Viral Shah (Harvard) 		Hg simulation Not delivered
WRF-GC Hg simulation Xiaotian Xu (Nanjing U.)
Yanxu Zhang (Nanjing U.) 		Hg simulation
WRF-GC 		Not delivered
Updated HgII gas-partical partitioning Kaiyun Liu (Tsinghua U.)
Qingru Wu (Tsinghua U.)
Shuxiao Wang (Tsinghua U.) 		Hg simulation Not delivered
  • Should be option, not default
Dry deposition to F90 (readability) Chris Holmes (FSU) Dry deposition 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
PPN+hv, PPN+OH Robert Ryan (UCL) Chemistry
MBO Michael Vermeuel (UMN) Chemistry
Initial conditions for CH4 correcting background and stratospheric biases Todd Mooring (Harvard) Methane simulation
Migrating simple SOA formation from carbon_mod.F90 into the KPP "full-chemistry" mechanism Bob Yantosca (Harvard) Aerosols
Structural
  • Ongoing
Re-binning of off-line sea salt and dust for use in TOMAS Betty Croft (Dalhousie) Aerosols
Adaption of TOMAS' in-cloud aqueous sulfate production for KPP versus sulfate_mod.F90 Betty Croft (Dalhousie) Aerosols
ML algorithms for bulk aerosols Arshad Nair (SUNY Albany)
Fangqun Yu (SUNY Albany) 		Aerosols
PM2.5 and PM10 calculations: aerodynamic vs geometric diameters Shixian Zhai (Harvard) Aerosols
Updates to Hodzic SOA scheme Jared Brewer (Harvard) Aerosols
Automated reduction in isoprene scheme Dan Westervelt (Lamont-Doherty) Aerosols
Brown carbon chemsitry Jingqiu Mao (U. Alaska)
Xuan Wang (CUHK) 		Aerosols
GEOS resolution and subgrid convection - Part 2 RAS parameter tuning Tailong He (Toronto)
Dylan Jones (Toronto)
Andrea Molod (NASA GMAO) 		Convection
High-res top-down TROPOMI-derived seasonal mean NOx emissions for China Jintai Lin (PKU) Emissions
  • Horizontal resolution: 5km, temporal resolution: JJA mean
  • monthly data will be available at a later stage; please contact us
Updated biomass burning emission factors and species Tess Carter (MIT) Emissions
Updated offline sea salt emissions Hongjian Weng (PKU)
Jintai Lin (PKU) 		Emissions
Canopy Physics Model Sam Silva (MIT) Emissions &
Science
Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone Bob Yantosca (Harvard) Model performance
  • Ongoing (will be done as time allows)
Assess memory leak in GCHP Killian Murphy (York) Model performance
Hybrid MPI-OpenMP in GCHP Seb Eastham (MIT)
Killian Murphy (York) 		Model performance
Improve pressure handling in GCHP advection Seb Eastham (MIT)
Yuanjian Zhang (WashU) 		GCHP
Use ExtData2G as default GCHP input module Lizzie Lundgren (Harvard) GCHP Will replace ExtData.rc with yaml file

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
Snow / Icy Bromine Becky Alexander (UW)
William Swanson (U. Alaska)
Shuting Zhai (UW) 		Chemistry
Monoterpene oxidation scheme Jessica Haskins (MIT) Chemistry
Fire related VOCs including furans Lu Hu (UMT)
Lixu Jin (UMT) 		Chemistry
Extension of UCX into the mesosphere Seb Eastham (MIT)
Eric Fleming (NASA) 		Chemistry
Methane flux ingestion Eloise Marais (UCL) Chemistry
Dust non-sphericity impacts on surface chem and optical properties Inderjeet Singh (WashU) Aerosols
Size-resolved stratospheric aerosol Seb Eastham (MIT) Aerosols
Extend aerosol settling Eloise Marais (UCL) Aerosols
Stratospheric aerosol APM Fangqun Yu (SUNY) Aerosols
Plume-in-grid model Hongwei Sun (Harvard) Chemistry
Updated lightning NOx: Prescribe from ground and geostationary lightning flashes Lee Murray (Rochester) Emissions
Seb aircraft emissions beyond recent 2019 update Seb Eastham (MIT) Emissions
FRP-based fire emsisions for eastern US at 0.2 deg Charlie Fite (FSU) Emissions
Hg iodine chemistry Yiming Fu
Yanxu Zhang (Nanjing U.) 		Hg simulation
Hg simulation in GCHP Ari Feinberg (MIT)
Lyssa Freese (MIT) 		Hg simulation
Update Hg ocean and soil boundary conditions for consistency with new chemistry Yanxu Zhang (Nanjing U.) Hg simulation
Dry deposition diagnostics by land cover Holly Nowell (FSU) Diagnostics
Dry deposition process diagnostics Holly Nowell (FSU) Diagnostics
Isotope simulation for CO and CH4 in GCHP Lee Murray (Rochester) Carbon simulation
Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3) Melissa Sulprizio (Harvard)
Tia Scarpelli (U. Edinburgh)
Zichong Chen (Harvard) 		Emissions
CH4 simulation
Modularization of aerosols code for interface with GOCART in GEOS Christoph Keller (GMAO) Structural
Improve load balancing in GCHP Seb Eastham (MIT) Model performance
Testing the use of monthly mean MERRA-2 CWC with Pb-210 aerosol tracer Bo Zhang (NIA)
Hongyu Liu (NIA / NASA Langley) 		Transport
Testing the use of a new scavenging parameterization developed by Luo and Yu for cold cloud with Pb-210 aerosol tracer Gan Luo (SUNY Albany)
Fangqun Yu (SUNY-Albany) 		Transport
Evaluate vertical mixing in GEOS-Chem with model-model and model-observation comparisons Seb Eastham (MIT)
Clara Orbe (NASA GISS)
Andrew Schuh (CSU) 		Transport
MAPL version 3 Lizzie Lundgren (Harvard) GCHP Will include History wildcard handling in GCHP


Migrate benchmark meteorology from MERRA2 to GEOS-IT GCST Benchmarking

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
Updates to Aromatic chemistry Stephen MacFarlane (UOW)
Jenny Fisher (UOW) 		Chemistry
Nitrate photolysis Mat Evans (York)
Thomas Sherwen (York)
Matthew Rowlinson (York) 		Chemistry
In aerosol chemistry Halogens Mat Evans (York)
Hansen Cao (CU Boulder) 		Chemistry
Benchmark box model of GC Chemistry Katie Travis (NASA) Chemistry
Alkyl nitrates Alk7, PHAN Katie Travis (NASA) Chemistry
Add stratospheric ozone species to full-chemistry simulations Lee Murray (Rochester) Chemistry
Perchlorate chemistry Yuk Chun Chan (UWAB) Chemistry
Explicit heterogeneous sulfate chemistry Katie Travis (NASA)
Becky Alexander (UT) 		Chemistry
HOx and ozone "emissions" from lightning as option in model to play with Jingqiu (Alaska)
Lee Murray (Rochester) 		Emissions
Sea salt aerosol from sea ice leads Hannah Horowitz (U. Illinois) Emissions
Drought-stress algorithm Wei Li (U. Houston)
Biomass burning injection height profiles Inderjeet Singh (WashU) Emissions
OCIM integration Chris Holmes (FSU)
Lee Murray (Rochester)
Updating landcover products in GEOS-Chem Chris Holmes (FSU)
Jeff Geddes (BU) 		Input data
Dry deposition physical improvement Chris Holmes (FSU) Dry deposition
TOMAS WRF-GC in regional Thailand simulation Win Trivitayanurak (Chulalongkorn U) Aerosols
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