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 Working Groups and the Steering Committee.
== Merged and awaiting release ==


== GEOS-Chem versions in development ==
See the links below for items merged and awaiting release.


=== 13.0.0 ===
{| border=1 cellspacing=0 cellpadding=5
|-bgcolor="#CCCCCC"
!width="300px"|Mergeable at any time
!width="200px"|Version in development


<span style="color:darkorange">'''See the [[GEOS-Chem 13.0.0]] page for more details.'''''</span>
|-valign="top"
|align="center"|'''[[GEOS-Chem no-diff-to-benchmark]]'''
|align="center"|'''[[GEOS-Chem 14.5.0]]'''


== Priorities assigned to upcoming GEOS-Chem versions ==
|}


=== 13.1.0 ===
== Feature integration in progress ==


This version will require a 1-month full-chemistry benchmark.
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  
|-bgcolor="#CCCCCC"
|-bgcolor="#CCCCCC"
!width="500px"|Feature
!width="200px"|Feature
!width="200px"|Submitted by
!width="200px"|Contributor(s)
!width="100px"|Type
!width="100px"|Model scope
!width="300px"|Notes
!width="100px"|Ease of implementation
!width="300px"|Notes and References
 
|-valign="top"
|ALK4 & R4N2 chemistry
|Jared Brewer (UMN)
|Chemistry
|Simple
|
*[https://github.com/geoschem/geos-chem/pull/2352 geos-chem PR #1625]
*[https://acmg.seas.harvard.edu/files/acmg/files/brewer2022.pdf Brewer, J.F. et al., J. Geophys. Res., 2023.]
 
|-valign="top"
|Fix pressure handling in HEMCO standalone
|Melissa Sulprizio (Harvard)
|HEMCO
|Simple
|
*[https://github.com/geoschem/HEMCO/issues/277 HEMCO issue #277]
 
|-valign="top"
|Uncomment zeroed out Ca, Mg, and K cations passed to aerosol thermo (HETP)
|Becky Alexander (UW)
|Aerosols
|Simple
|
*[https://github.com/geoschem/geos-chem/pull/2398 geos-chem PR #2398]
 
|-valign="top"
|Add 1/2-degree GC-Classic global transport tracer run directory option for GEOS-IT
|Lizzie Lundgren (Harvard)
|Run directories
|Simple
|
*[https://github.com/geoschem/geos-chem/pull/2397 geos-chem PR #2397]
 
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/1288 New soil NOx parameterization]
|Yi Wang (Iowa)<br>Jun Wang (Iowa)
|Emissions
|Medium
|
*[https://github.com/geoschem/geos-chem/issues/1288 geos-chem issue #1288]
*Incorporates new met field TSOIL1


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/HEMCO/issues/46 Distribute emissions vertically in the boundary layer]
|Fix obspack - not working in 14.4.0
|Barron Henderson (EPA)<br>GCST
|Bob Yantosca (Harvard)
|Structural &<br>Science
|Diagnostics
|Medium
|
|
*Vertical profiles have been delivered to GCST
*[https://github.com/geoschem/geos-chem/issues/2328 geos-chem issue #2328]


|-valign="top"
|-valign="top"
|[https://pubs.acs.org/doi/10.1021/acs.est.8b07241 Diurnal scale factors of power plants emissions in China]
|Cloud-J v8.0 including UV H2O absorption
|Hongjian Weng (PKU)<br>Jintai Lin (PKU)
|Lizzie Lundgren (Harvard)<br>Michael Prather (UCI)
|Science
|Photolysis
|Medium
|
|
*See [https://github.com/geoschem/geos-chem/issues/548 geoschem/geos-chem #548]
*[https://github.com/geoschem/Cloud-J/issues/12 Cloud-J issue #12]
*[https://datadryad.org/stash/dataset/doi:10.7280/D1Q398 Dataset]
*[https://www.science.org/doi/10.1126/science.adn0415 Prather and Zhu (2024)]


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/pull/364 Initial modifications for HEMCO internal grid]
|Make GC-Classic bit-for-bit reproducible upon restart
|Haipeng Lin (Harvard)
|Lizzie Lundgren (Harvard)
|Structural
|GC-Classic
|Medium
|
*[https://github.com/geoschem/HEMCO/issues/18 HEMCO issue #18]
 
|-valign="top"
|Capture all trop and PBL height changes in budget diagnostics
|Chris Holmes (FSU)<br>Lizzie Lundgren (Harvard)
|Diagnostics
|Medium
|
|
*[https://github.com/geoschem/geos-chem/pull/2103 geos-chem PR 2103]


|}
|}


=== 13.2.0 ===
== Prioritized and in the queue ==


This version will require a 1-month and 1-year full-chemistry benchmarks, with and without Luo wet deposition.
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  
|-bgcolor="#CCCCCC"
|-bgcolor="#CCCCCC"
!width="500px"|Feature
!width="200px"|Feature
!width="200px"|Submitted by
!width="200px"|Contributor(s)
!width="100px"|Type
!width="100px"|Model scope
!width="300px"|Notes
!width="100px"|Ease of implementation
!width="100px"|Delivery status
!width="300px"|Notes and References


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/547 Update US emissions to NEI2016]
|Retire CH4, CO2, tagCO simulations in favor of carbon simulation
|Barron Henderson (EPA)<br>Lyssa Freese (MIT)
|Melissa Sulprizio (Harvard)
|Science
|Carbon gases
|Simple
|
|
*Files available at [ftp://newftp.epa.gov/Air/aqmg/global/NEI2016fh/ this ftp site]. Barron writes, "They have not yet been used in a publication, so I caution users to look for anything and report back."
|
*[https://github.com/geoschem/geos-chem/issues/2387 geos-chem issue #2387]


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2569/2020/ Canopy Physics Model]
|New version of CEDS at 0.1 deg
|Sam Silva (MIT)
|Dandan Zhang (WashU)
|Structural
|Emissions
|Simple
|Delivered June 2024
|
|
*[https://github.com/geoschem/geos-chem/issues/1745 geos-chem issue #1745]


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2879/2020/ Improved wet scavenging from Luo et al. (2020)] (as option)
|Chemistry for RCOOH, updated monoterpenes, new PNs and ANs
|Gan Luo (Albany)<br>Fangqun Yu (Albany)
|Katie Travis (NASA)<br>Kelvin Bates (CU Boulder)
|Science
|GC-Classic
|Simple
|Delivered June 2024
|
|
*Delivered to GCST (Nov 2020)
*[https://github.com/geoschem/geos-chem/pull/2318 geos-chem PR #2318]
*See [https://github.com/geoschem/geos-chem/pull/522 geoschem/geos-chem PR #522]
*These updates will replace the Luo et al. (2019) option


|-valign="top"
|Use USTAR read from GEOS instead of calculating from U10M and V10M
|Yuanjian Zhang (WashU)
|Emissions
|Simple
|Delivered June 2024
|
*[https://github.com/geoschem/HEMCO/pull/279 HEMCO PR #279]
*NOTE: Mass tuning factors must be recomputed for each met field & resolution (GCClassic)


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/331 Provide climatologies for lightning NOx, volcano, and open fire emissions]
|Correct the issue that injection height has been artifically decreased by HEMCO
|GCST
|Yuanjian Zhang (WashU)
|Science
|Emissions
|Simple
|Delivered June 2024
|
|
*[https://github.com/geoschem/geos-chem/pull/279 geos-chem PR #2358]


|-valign="top"
|-valign="top"
|[https://www.sciencedirect.com/science/article/abs/pii/S1352231019305138?via%3Dihub Trace metal simulation]
|PPN photolysis
|Junwei Xu (Dalhousie)
|Bex Horner (UCL)
|Science
|Chemistry
|Medium
|Delivered June 2024
|
|
*Delivered to GCST (Nov 2020)
*[https://github.com/geoschem/geos-chem/pull/2371 geos-chem PR #2371]
*See [https://github.com/geoschem/geos-chem/pull/511 geoschem/geos-chem PR #511]
*[https://doi.org/10.5194/egusphere-2024-1541 Horner et al. (2024)]
*Need to update Cloud-J input files accordingly


|}
|}


=== 13.3.0 ===
== Ready to go in ==


This version will require a 1-month and 1-year full-chemistry benchmarks, with and without the adaptive chemical solver.
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  
|-bgcolor="#CCCCCC"
|-bgcolor="#CCCCCC"
!width="500px"|Feature
!width="200px"|Feature
!width="200px"|Submitted by
!width="200px"|Contributor(s)
!width="100px"|Type
!width="100px"|Model scope
!width="300px"|Notes
!width="100px"|Delivery status
!width="300px"|Notes and Refereneces
 


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/560 C2H4 and C2H2 chemistry]
|Binary Activity Thermodynamic (BAT) model for non-ideal mixing of water and organics in organic aerosol
|Kelvin Bates (Harvard)<br>Ke Li (Harvard)
|Camilo Serrano (McGill)<br>Andreas Zuend (McGill)
|Science
|Aerosols
|Not delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/2392 geos-chem issue #2392]


|-valign="top"
|-valign="top"
|[http://acmg.seas.harvard.edu/publications/2020/moch_2020_hms_global.pdf HMS chemistry]
|Update UCX to include gravitational settling of aerosol species beyond just BCPI
|Jonathan Moch (Harvard)
|Conor Barker (UCL)<br>Eloise Marais (UCL)
|Science
|Aerosols
|Not delivered
|
|
*Delivered to GCST (Sep 2020)
*See [https://github.com/geoschem/geos-chem/pull/456 geoschem/geos-chem PR #456]


|-
|-valign="top"
|[https://acp.copernicus.org/articles/17/3699/2017/ Blowing snow emissions of sea salt and sea salt bromide]
|Seasalt aerosol from sea ice leads (2002-2011)
|Lyatt Jaegle (UW)
|Hannah Horrowitz (UIUC)
|Science
|Aerosols
|Not delivered
|
|
*Delivered to GCST (Jun 2020)
*Offline and online, ready to go in HEMCO (optional in addition to existing seasalt emissions)
*See [https://github.com/geoschem/geos-chem/pull/356 geoschem/geos-chem PR #356]


|-valign="top"
|-valign="top"
|[https://www.pnas.org/content/117/42/26076 Updated aerosol dry deposition]
|Fire and anthropogenic emissions not currently turned on (monoterpenes, 1-butadiene etc.)
|Jeff Pierce (CSU)
|Katie Travis (NASA)<br>Kelvin Bates (CU Boulder)
|Science
|Emissions
|Not delivered
|
|
*See [https://github.com/geoschem/geos-chem/issues/604 geoschem/geos-chem #604]
*[https://github.com/geoschem/geos-chem/issues/2390 geos-chem issue #2390]
 
|-valign="top"
|-valign="top"
|[http://globalchange.bnu.edu.cn/research/laiv6 Updated Yuan/BNU MODIS LAI product (2000-2019)]
|Global organic N dep from various emissions; nitrate aromatics updates
|Jenny Fisher (U. Wollongong)
|May Fu (SUSTech)
|Science
|Chemistry +<br>Deposition
|Not delivered
|
|
*Processing scripts delivered to GCST (Aug 2020)


|-valign="top"
|-valign="top"
|[https://acp.copernicus.org/articles/21/1861/2021/ Updated Rn-222 emissions]
|Dry deposition to F90 to improve readability
|Bo Zhang
|Chris Holmes (FSU)
|Science
|Dry Deposition
|Not delivered
|
|
*The existing Rn emissions will remain as an option
*[https://github.com/geoschem/geos-chem/issues/2389 geos-chem issue #2389]
*Data are available at https://doi.org/10.5281/zenodo.3942287


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2475/2020/gmd-13-2475-2020.pdf Adaptive chemical solver] (as option)
|Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange
|Lu Shen (Harvard)
|Joey Lam  (CUHK)<br>Amos Tai (CUHK)
|Science
|Dry deposition
|Delivered<br>Feb 2021
|
|
*[https://github.com/geoschem/geos-chem/pull/629 geos-chem PR #629]


|}
|-valign="top"
|FRP-based fire emissions for eastern US at 0.2 (2019-2020)
|Chris Holmes (FSU)
|Emissions
|Not delivered
|
*[https://github.com/geoschem/geos-chem/issues/2388 geos-chem issue #2388]


== Priorities not yet assigned to a particular version ==
|-valign="top"
|China agriculture NH3 emissions
|Amos Tai (CUHK)
|Emissions
|Not delivered
|


The following items have been identified as priorities for GEOS-Chem, but have not yet been assigned to a particular GEOS-Chem version.
|-valign="top"
|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.  


=== Ready to go in ===
|-valign="top"
|New source functions for transport tracers beryllium-7 and beryllium-10
|Minjie Zheng (ETH)
|Emissions
|Delivered<br>June 2024
|
*Available at https://zenodo.org/records/8372652


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|-bgcolor="#CCCCCC"
|LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100
!width="500px"|Feature
|Yang Li (Baylor U)<br>Loretta Mickley (Harvard)
!width="200px"|Submitted by
|Emissions
!width="100px"|Type
|Delivered
!width="300px"|Notes
|
*Data involves many files- need to think about temporal frequency
 
|-valign="top"
|Australian Hg emissions (2000-2019)
|Stephen MacFarlane (Wollongong)<br>Jenny Fisher (Wollongong)
|Emissions
|Not delivered
|
*[https://pubs.rsc.org/en/content/articlelanding/2022/em/d2em00019a MacFarlane et al. (2024)]
*Includes emissions from black and brown coal power plants, various metal production/processing sources (Aluminium, gold, copper, lead, etc), waste products, cement production, oil refining and petroleum, chlor alkali plants, and cremation


|-valign="top"
|Hg geogenic emissions (volcanic, rock weathering)
|Eric Roy (MIT)
|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"
|[https://github.com/geoschem/geos-chem/issues/559 Implement H2 chemistry in UCX]
|Hg biomass burning - FINN2.5 & GFED4
|Chris Holmes (FSU)
|Eric Roy (MIT)
|Science
|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"
|[https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2006GL026015 Stratospheric HCN chemistry]
|BCC-GC online
|Armin Kleinbohl (JPL)<br>Debra Weisenstein (Harvard, retired)
|Lin Zhang (PKU)
|Science
|External Model
|Not delivered
|
|
*Delivered to GCST (Jun 2020)


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2569/2020/ MEGAN3]
|GC-YIBS with online fire emissions
|Sam Silva (MIT)
|Xu Yue (NUIST)<br>Hong Liao (NUIST)
|Science
|External Model
|Not delivered
|
|
*Implementation details may be found at https://zenodo.org/record/3614062#.XzvrH5NKjOR


|-valign="top"
|-valign="top"
|[https://acp.copernicus.org/articles/17/3699/2017/ GC-YIBs biosphere-atmospheric chemistry coupled model]
|GISS-GC offline (GCAP)
|Xu Yue (NUIST)
|Lee Murray (Rochester)
|Science
|GCAP
|Not delivered
|
|
*See [https://github.com/geoschem/geos-chem/issues/425 geoschem/geos-chem #425]


|-valign="top"
|-valign="top"
|[[Stratospheric_chemistry#Treatment_of_the_mesosphere_in_UCX_simulations|Extend UCX into the mesosphere]]
|Archived TCR-2 OH fields for carbon simulations
|Sebastian Eastham (MIT)<br>Eric Fleming (NASA GMAO)
|Kazu Miyazaki (JPL)
|Science
|Input data
|Not delivered
|
|
*This will be the default OH, but users will have the option of selecting other OH fields


|}
|}


=== Almost there (< 6 months) ===
== Almost there (< 6 months) ==


{| border=1 cellspacing=0 cellpadding=5
Features listed in this table are in development and will likely be delivered to the GEOS-Chem Support Team within the next 6 months.
 
{|border=1 cellspacing=0 cellpadding=5
|- bgcolor="#cccccc"
|- bgcolor="#cccccc"
!width="500px"|Item
!width="200px"|Feature
!width="200px"|Author(s)
!width="200px"|Contributor(s)
!width="100px"|Type
!width="100px"|Model scope
!width="300px"|Notes
!width="420px"|Notes and References
 
|-valign="top"
|Dust non-sphericity impacts on optical properties
|Inderjeet Singh (WashU)
|Aerosols
|


|-valign="top"
|-valign="top"
|Fix stratospheric flooding
|Fixes to stratospheric aerosol settling
|Sebastian Eastham (MIT)
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|Science/Bug fix
|Aerosols
|
|


|-valign="top"
|-valign="top"
|Diagnostic to archive XCO2, XCO, and XCH4
|DMS chemistry in v14
|Dylan Jones (Toronto)
|Linia Tashmim (UCR)<br>Will Porter (UCR)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Provide archived TCR-2 GEOS-Chem OH fields for carbon simulations
|KPP standalone + 3D Interface
|Kazu Miyazaki (JPL)
|Obin Sturm (USC)
|Science
|Chemistry
|
 
|-valign="top"
|NO2+OH+H2O kinetics
|Mat Evans (York)
|Chemistry
|
 
|-valign="top"
|LSODES solver in KPP for faster kinetics
|Haipeng Lin (Harvard)
|Chemistry
|
 
|-valign="top"
|Load balancing in chemistry solver (GCHP)
|Zhouran Sun (WashU)
|Chemistry +<br>Performance
|
 
|-valign="top"
|Active chemistry in mesosphere for both GCHP and GCClassic
|Helena McDonald (MIT)<br>Sebastian Eastham (ICL)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Aromatic VOC chemistry
|Updated aromatic oxidation
|Kelvin Bates (Harvard)<br>Ke Li (Harvard)
|Stephen MacFarlane (Wollongong)<br>Jenny Fisher (Wollongong)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|BrC aging
|MCO3 uptake by cloud forming MP; leading to lower PAN
|Xuan Wang (Harvard)<br>Melanie Hammer(Dalhousie)
|Laura Yang (Harvard)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|One-Way Coupling w/ GISS ModelE3
|Implement isotope simulation for CH4 in the carbon simulation
|Lee Murray (Rochester)
|Lee Murray (Rochester)
|Structural
|Chemistry
|
*Will have to change negative emissions from soil to a first-order loss process
 
|-valign="top"
|Documentation for adding additional aerosol species
|Connor Barker (UCL)
|Documentation
|
 
|-valign="top"
|Column diagnostics
|Lizzie Lundgren (Harvard)<br>Viral Shah (GMAO)
|Diagnostics
|
 
|-valign="top"
|TOMAS rate diagnostics -- improve performance
|Betty Croft (WashU/Dal)
|Diagnostics +<br>Performance
|
 
|-valign="top"
|Archive gamma values from heterogeneous chemistry
|Bob Yantosca (Harvard)
|Diagnostics
|
 
|-valign="top"
|RRTMG Documentation
|GCST
|Documentation
|
 
|-valign="top"
|Canopy Physics Model
|Sam Silva (MIT)
|Dry Deposition
|
*Available at https://zenodo.org/records/3614062#.XzvrH5NKjOR (GEOS-Chem 12.3.0)
 
|-valign="top"
|Dry deposition diagnostics by land cover
|Holly Nowell (FSU)<br>Chris Holmes (FSU)
|Dry Deposition
|
 
|-valign="top"
|Dry deposition process diagnostics
|Holly Nowell (FSU)<br>Chris Holmes (FSU)
|Dry Deposition
|
 
|-valign="top"
|Biomass burning for TOMAS
|Nicole June (CSU)
|Emissions +<br>Microphysics
|
 
|-valign="top"
|Historic biomass burning (1750-2010)
|Pengfei Liu (Georgia Tech)
|Emissions
|
 
|-valign="top"
|Rice methane emissions
|Zichong Cheng (Harvard)
|Emissions+<br>Carbon simulation
|
 
|-valign="top"
|Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3)
|Tia Scarpelli (Carbon Mapper)<br>Melissa Sulprizio (Harvard)
|Emissions
|
 
|-valign="top"
|New prior CO2 biospheric fluxes from CMS-FLUX and GMAO
|Kevin Bowman (JPL)<br>Lesley Ott (GMAO)
|Emissions
|
*GMAO can provide high-resolution  fluxes (as high as 12 km)
 
|-valign="top"
|Snowpack Br2 emission
|Chris Holmes (FSU)
|Emissions
|
 
|-valign="top"
|EDGAR v8.1_toxHg emissions for 1970-2022
|Eric Roy (MIT)
|Emissions
|
 
|-valign="top"
|Improve pressure handling in GCHP advection
|Yuanjian Zhang (WashU)<br>Seb Eastham (ICL)
|GCHP
|
 
|-valign="top"
|Add error trap for duplicate scale factors in HEMCO
|Bob Yantosca (Harvard)
|HEMCO
|
|
*Work is finished and a manuscript is in preparation


|-valign="top"
|-valign="top"
|Shared Socioeconomic Pathways Emission Inventories
|Integration testing: Add stretched grid
|Hong Liao (NUIST)
|Lizzie Lundgren (Harvard)
|Science
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange
|Integration testing: Add GCHP mass flux run
|Amos Tai (CUHK)
|Lizzie Lundgren (Harvard)
|Science
|Quality Assurance
|
|


|-valign="top"
|Integration testing: Add run with all diagnostics turned on
|GCST
|Quality Assurance
|


|-valign="top"
|-valign="top"
|Rediagnosis of RAS convection in GEOS-Chem
|Integration testing: Reinstate TOMAS40
|Tailong He (Toronto)<br>Dylan Jones (Toronto)<br>Andrea Molod (NASA/GMAO)
|Betty Croft (Dalhousie/WashU)
|Science
|Quality Assurance
|
|
*Work is finished and a manuscript is in preparation.


|-valign="top"
|-valign="top"
|Read-in of native GEOS output in GCHP
|Strat-adjusted RF in GCC and GCHP
|WUStL GCST
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|Science
|Radiation
|
|


|-valign="top"
|-valign="top"
|Adoption of the Spack package manager for dependency management
|Continue cleanup of C-preprocessor switches
|Harvard GCST
|Lizzie Lundgren (Harvard)
|Structural
|Structural
|
|-valign="top"
|Updates to Luo deposition scheme
|Gan Luo (Albany)
|Wet Deposition
|
*New version, keep as switch (not default)
|-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 (Albany)<br>Fangqun Yu (Albany)
|Wet Deposition
|
|


|}
|}


=== Over the horizon (6-12 months) ===
== 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.


{| border=1 cellspacing=0 cellpadding=5
{| border=1 cellspacing=0 cellpadding=5
|- bgcolor="#cccccc"
|- bgcolor="#cccccc"
!width="500px"|Item
!width="200px"|Feature
!width="200px"|Author(s)
!width="200px"|Contributor(s)
!width="100px"|Type
!width="100px"|Model scope
!width="300px"|Notes
!width="420px"|Notes and References
 
|-valign="top"
|ML algorithms for bulk aerosol
|Arshad Nair (Albany)<br>Fangqun Yu (Albany)
|Aerosols
|
 
|-valign="top"
|Heterogeneous sulfate chemistry
|Katie Travis (NASA)
|Chemistry
|
 
|-valign="top"
|H2 as an active species
|Seb Eastham (ICL)
|Chemistry
|
 
|-valign="top"
|HCN, acetonitrile as fire tracers
|Kevin Bates (CU Boulder)
|Chemistry
|
 
|-valign="top"
|Implement ethane in carbon simulation
|Yuzhong Zhang (Westlake)
|Chemistry
|
 
|-valign="top"
|Mesospheric source of CO
|Dylan Jones (UofT)<br>Pam Wales (NASA GSFC)
|Emissions
|
 
|-valign="top"
|Drought-stress algorithm
|Wei Li (Houston)
|Emissions
|
 
|-valign="top"
|Physically-based resolution correction for BVOC emissions using MEGAN
|May Fu (SUSTech)
|Emissions
|
 
|-valign="top"
|Canadian forest fire prediction system (Canada government forecast model)
|Robin Stevens (Montreal)
|Emissions
|


|-valign="top"
|-valign="top"
|Update OCS simulation in the standard code
|Cooking emissions (not biofuel)
|Kevin Bowman (JPL)
|Kelvin Bates (CU Boulder)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|Methylethylketone chemistry
|State-specific annual emissions scaling factors (US) (1990-2021)
|Jared Brewer (CSU)
|Ishir Dutta (MIT)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|Add sulfate dependence to SOA yield from isoprene in simple SOA
|GISS-GC online
|Eloise Marais (Leicester)
|Lee Murray (Rochester)
|Science
|External model
|
|


|-valign="top"
|-valign="top"
|Updated Hg chemistry:
|Hybrid MPI-OpenMP in GCHP
*Streamlining of Hg simulation through HEMCO and KPP
|Seb Eastham (MIT)<br>Killian Murphy (York)<br>Lizzie Lundgren (Harvard)
*Hg gas-phase photo-reduction
|GCHP
|Viral Shah (Harvard)<br>Colin Thackray (Harvard)
|Science
|
|


|-valign="top"
|-valign="top"
|GTMM updates
|MAPL3: Update to MAPL3 in GCHP, including replacement of ExtData.rc and HISTORY.rc with YAML files
|Ben Geyman (Harvard)
|Lizzie Lundgren (Harvard)
|Science
|GCHP
|
|


|-valign="top"
|-valign="top"
|Landcover/Fire Emissions Offline LPJlmfire
|MAPL3: Comply with MAPL "positive" standard in GCHP diagnostic files
|Loretta Mickley (Harvard)
|Lizzie Lundgren (Harvard)
|Science
|GCHP
|
|


|-valign="top"
|-valign="top"
|[https://www.pnas.org/content/117/42/26076 Aerosol dry deposition updates]
|MAPL3: Wildcards in GCHP History
|Jeff Pierce (CSU)
|Lizzie Lundgren (Harvard)
|Science
|GCHP
|
|


|-valign="top"
|-valign="top"
|Integrating GMAO's tracer gridded component in GCHP
|MAPL3: Output emissions with positive up convention in GCHP
|Sebastian Eastham (MIT)
|Lizzie Lundgren (Harvard)
|GCHP
|
 
|-valign="top"
|Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone
|Bob Yantosca (Harvard)
|Performance
|
 
|-valign="top"
|Photophysical oxidation of aldehydes
|Paulo Sebastianelli (Wollongong)<br>Jenny Fisher (Wollongong)
|Chemistry
|
 
|-valign="top"
|DMS updates
|Will Porter (UCR)
|Chemistry
|
 
|-valign="top"
|Furans emission and chemistry
|Lixu Jin (Montana)<br>Lu Hu (Montana)
|Chemistry + <br>Emissions
|
 
|-valign="top"
|Cl2 prodcution from Fe aerosol
|Qianjie Chen (HK Poly)<br>Becky Alexander (UW)
|Chemistry
|
 
|-valign="top"
|VCP emissions
|Kevin Bates (CU Boulder)
|Emissions
|
 
|-valign="top"
|Bidirectional land-atmosphere exchange for Hg
|Yuying Cui (MIT/Tsinghua)
|Hg simulation
|
 
|-valign="top"
|OH covariances for inversions
|Elise Penn (Harvard)
|Inversions
|
 
|-valign="top"
|CESM2-GC offline
|Seb Eastham (ICL)<br>Lee Murray (Rochester)
|Met fields
|
 
|-valign="top"
|Re-binning of off-line sea salt and dust for TOMAS
|Betty Croft (Dalhousie)
|Microphysics
|
 
|-valign="top"
|TOMAS nucleation updates
|Sam O'Donnell (CSU)
|Microphysics
|
 
|-valign="top"
|Stratospheric aerosol APM
|Fangqun Yu (SUNY Albany)
|Microphysics
|
 
|-valign="top"
|Transition from MERRA-2 to GEOS-IT for benchmarking
|Yuanjian Zhang (WashU)
|Quality Assurance
|
 
|-valign="top"
|Automate integration testing on AWS
|Yidan Tang (WashU)
|Quality Assurance
|
 
|-valign="top"
|Integration testing: Add across end of year run
|GCST
|Quality Assurance
|
 
|-valign="top"
|Integration testing: Add GEOS-IT
|Yuanjian Zhang (WashU)
|Quality Assurance
|
 
|-valign="top"
|Separate mixing, emissions, and drydep
|Yuanjian Zhang (WashU)
|Structural
|
 
|-valign="top"
|Intel IFX compiler
|Bob Yantosca (Harvard)
|Structural
|Structural
|
|


|-valign="top"
|-valign="top"
|Mass flux-based transport in GCHP
|CMake option to only build libraries but not executable, also passing C-preprocessor statements to turn off code
|Sebastian Eastham (MIT)
|Bob Yantosca (Harvard)<br>Lee Murray (Rochester)
|Science
|Structural
|
|


|-valign="top"
|-valign="top"
|Streamlining of specialty simulations through HEMCO and KPP
|Remove differences introduced when breaking up GC-Classic runs in time; and flexible precision in HEMCO
|GCST
|Lizzie Lundgren (Harvard)
|Science
|Structural
|
 
|-valign="top"
|Limit allocation of State_Met to what is needed per simulation
|Melissa Sulprizio (Harvard)
|Structural
|
 
|-valign="top"
|Using 3-D precipitation fluxes to calculate precipitation formation and re-evaporation in scavenging (to be consistent with GEOS/GOCART & ground precipitation)
|Gan Luo (Albany)<br>Hongyu Liu (NIA/LaRC)<br>Bo Zhang (NIA/LaRC)
|Wet deposition
|
|


|}
|}


=== Longer term (12-24 months)===
== 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.


{| border=1 cellspacing=0 cellpadding=5
{| border=1 cellspacing=0 cellpadding=5
|- bgcolor="#cccccc"
|- bgcolor="#cccccc"
!width="500px"|Item
!width="200px"|Feature
!width="200px"|Author(s)
!width="200px"|Contributor(s)
!width="100px"|Type
!width="100px"|Model scope
!width="300px"|Notes
!width="420px"|Notes and References
 
|-valign="top"
|Modal aerosol model (MAM7) in GCHP
|Shreya Sharma (MIT)
|Aerosols
|
 
|-valign="top"
|Online OCIM ocean biogeochemistry
|Lee Murray (Rochester)<br>Hannah Horowitz (UIUC)<br>Chris Holmes (FSU)
|Chemistry
|
 
|-valign="top"
|Perchlorate chemistry
|Yuk Chun Chan (UW)
|Chemistry
|
 
|-valign="top"
|Non-stomatal dry deposition (2-layer canopy model)
|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
|


|-valign="top"
|-valign="top"
|GCHP Adjoint
|Glyoxal updates from isoprene
|Daven Henze (CU Boulder)
|Tzung-May Fu (SUSTech)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Implement isotope simulation for CO and CH4 in GCHP
|Iodine chemistry
|Lee Murray (Rochester)
|Becky Alexander (UW)<br>Xuan Wang (CUHK)
|Science
|Chemistry
|
 
|-valign="top"
|GFED5 biomass burning
|Eric Roy (MIT)
|Emissions
|
 
|-valign="top"
|Ocean Hg surface concentrations for 2010-2020 from multi-model ensemble
|Eric Roy (MIT)<br>Ari Feinberg (IQF-CSIC)
|Hg simulation
|
 
|-valign="top"
|Soil Hg emissions 2010-2020
|Eric Roy (MIT)<br>Ari Feinberg (IQF-CSIC)
|Hg simulation
|
 
|-valign="top"
|Air-sea exchange parameterization
|Eric Roy (MIT)
|Hg simulation
|
 
|-valign="top"
|Soil Hg emissions parameterization
|Ari Feinberg (IQF-CSIC)
|Hg simulation
|
 
|-valign="top"
|Sea salt uptake of GOM
|Eric Roy (MIT)
|Hg simulation
|
 
|-valign="top"
|Photoreduction rate constant
|Eric Roy (MIT)
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Migrate LETFK DA scheme to GCHP
|New observations (2010-2020) in standardized Hg benchmark for intercomparison
|Kazu Miyazaki (JPL)
|Eric Roy (MIT)/Ari Feinberg (IQF-CSIC)
|Science
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Super fast chemistry scheme
|Hg simulation in GCHP
|Benjamin Brown-Steiner (AER)<br>Makoto Kelp (Harvard)
|Eric Roy (MIT)
|Science
|Hg simulation
|
|
*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
|OCIM - biogeochemical model - (C/P/N/Fe - no Hg yet) (MATLAB)
|Becky Alexander (UW)
|Hannah Horowitz (UIUC)
|Science
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|DMS oxidation scheme updating
|Possibly updating Hg oxidation chemistry based on Utah field campaigns
|Becky Alexander (UW)<br>Qianjie Chen (UW)
|Jessica Haskins (Utah)
|Science
|Hg simulation
|
|
*Delayed - implemented pre-KPP
*Currently bring implemented in KPP by UC Riverside group


|-valign="top"
|-valign="top"
|Heterogeneous sulfate production
|New halogen/aerosol fields (surface area / AOD) from 10-year 14.4 benchmark simulation available online
|Lin Zhang (PKU)<br>Becky Alexander (UW)<br>Yuxuan Wang (U. Houston)
|Viral Shah (NASA GMAO); Eric Roy (MIT); Ari Feinberg (IQF-CSIC)
|Science
|Input data
|
|
*Delayed - implemented pre-KPP


|-valign="top"
|-valign="top"
|Hg in WRF-GC
|Extend IMI to CO2 (ICI)
|Yanxu Zhang (Nanjing)
|Hannah Nesser (JPL)  
|Science
|Inversions
|
|


|-valign="top"
|-valign="top"
|Hg with blowing snow
|Global emission inventory of metals
|Yanxu Xhang (Nanjing)
|Tzung-May Fu (SUSTech); He Zhong Tian (Peking Normal U)
|Science
|Metals simulation
|
|


|-valign="top"
|-valign="top"
|Hg isotopes
|Investigate and improve performance of aerosol chemistry
|Xiaotian Xu, Yanxu Xhang (Nanjing)
|Bob Yantosca (Harvard)
|Science
|Performance
|
|


|-valign="top"
|-valign="top"
|Hg in CESM CAM-CHEM
|PAH - update from version 11
|Peng Zhang, Yanxu Xhang (Nanjing)
|Lexia Cicone (MIT)
|Science
|POPs simulation
|
|


|-valign="top"
|-valign="top"
|Complex / multicomplex variables
|Species database more accessible; doc updates; TOL discussion
|Shannon Capps (Drexel)
|Jessica Haskins (Utah)
|Structural
|Structural
|
|


|-valign="top"
|-valign="top"
|Archived CMIP6 Met Products for GEOS-Chem Input
|Stretched-grid plotting in GCPy
|Lee Murray (Rochester)
|Killian Murphy (York)
|Science
|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]]'''''
|}

Revision as of 14:54, 25 July 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
ALK4 & R4N2 chemistry Jared Brewer (UMN) Chemistry Simple
Fix pressure handling in HEMCO standalone Melissa Sulprizio (Harvard) HEMCO Simple
Uncomment zeroed out Ca, Mg, and K cations passed to aerosol thermo (HETP) Becky Alexander (UW) Aerosols Simple
Add 1/2-degree GC-Classic global transport tracer run directory option for GEOS-IT Lizzie Lundgren (Harvard) Run directories Simple
New soil NOx parameterization Yi Wang (Iowa)
Jun Wang (Iowa) 		Emissions Medium
Fix obspack - not working in 14.4.0 Bob Yantosca (Harvard) Diagnostics Medium
Cloud-J v8.0 including UV H2O absorption Lizzie Lundgren (Harvard)
Michael Prather (UCI) 		Photolysis Medium
Make GC-Classic bit-for-bit reproducible upon restart Lizzie Lundgren (Harvard) GC-Classic Medium
Capture all trop and PBL height changes in budget diagnostics Chris Holmes (FSU)
Lizzie Lundgren (Harvard) 		Diagnostics 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
Retire CH4, CO2, tagCO simulations in favor of carbon simulation Melissa Sulprizio (Harvard) Carbon gases Simple
New version of CEDS at 0.1 deg Dandan Zhang (WashU) Emissions Simple Delivered June 2024
Chemistry for RCOOH, updated monoterpenes, new PNs and ANs Katie Travis (NASA)
Kelvin Bates (CU Boulder) 		GC-Classic Simple Delivered June 2024
Use USTAR read from GEOS instead of calculating from U10M and V10M Yuanjian Zhang (WashU) Emissions Simple Delivered June 2024
  • HEMCO PR #279
  • NOTE: Mass tuning factors must be recomputed for each met field & resolution (GCClassic)
Correct the issue that injection height has been artifically decreased by HEMCO Yuanjian Zhang (WashU) Emissions Simple Delivered June 2024
PPN photolysis Bex Horner (UCL) Chemistry Medium Delivered June 2024

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)
Fire and anthropogenic emissions not currently turned on (monoterpenes, 1-butadiene etc.) Katie Travis (NASA)
Kelvin Bates (CU Boulder) 		Emissions Not delivered
Global organic N dep from various emissions; nitrate aromatics updates May Fu (SUSTech) Chemistry +
Deposition 		Not delivered
Dry deposition to F90 to improve readability Chris Holmes (FSU) Dry Deposition Not delivered
Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange Joey Lam (CUHK)
Amos Tai (CUHK) 		Dry deposition Delivered
Feb 2021
FRP-based fire emissions for eastern US at 0.2 (2019-2020) Chris Holmes (FSU) Emissions Not delivered
China agriculture NH3 emissions Amos Tai (CUHK) Emissions Not delivered
T-dependent anthropogenic VOCs May Fu (SUSTech) Emissions Not delivered
  • Option. Requires processing existing anthropogenic VOC emissions to generate offline emissions to read in. Parameterised for China.
New source functions for transport tracers beryllium-7 and beryllium-10 Minjie Zheng (ETH) Emissions Delivered
June 2024
LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100 Yang Li (Baylor U)
Loretta Mickley (Harvard) 		Emissions Delivered
  • Data involves many files- need to think about temporal frequency
Australian Hg emissions (2000-2019) Stephen MacFarlane (Wollongong)
Jenny Fisher (Wollongong) 		Emissions Not delivered
  • MacFarlane et al. (2024)
  • Includes emissions from black and brown coal power plants, various metal production/processing sources (Aluminium, gold, copper, lead, etc), waste products, cement production, oil refining and petroleum, chlor alkali plants, and cremation
Hg geogenic emissions (volcanic, rock weathering) Eric Roy (MIT) Emissions Not delivered
Hg biomass burning - FINN2.5 & GFED4 Eric Roy (MIT) Emissions Not delivered
BCC-GC online Lin Zhang (PKU) External Model Not delivered
GC-YIBS with online fire emissions Xu Yue (NUIST)
Hong Liao (NUIST) 		External Model Not delivered
GISS-GC offline (GCAP) Lee Murray (Rochester) GCAP Not delivered
Archived TCR-2 OH fields for carbon simulations Kazu Miyazaki (JPL) Input data Not delivered
  • This will be the default OH, but users will have the option of selecting other OH fields

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
Dust non-sphericity impacts on optical properties Inderjeet Singh (WashU) Aerosols
Fixes to stratospheric aerosol settling Connor Barker (UCL)
Eloise Marais (UCL) 		Aerosols
DMS chemistry in v14 Linia Tashmim (UCR)
Will Porter (UCR) 		Chemistry
KPP standalone + 3D Interface Obin Sturm (USC) Chemistry
NO2+OH+H2O kinetics Mat Evans (York) Chemistry
LSODES solver in KPP for faster kinetics Haipeng Lin (Harvard) Chemistry
Load balancing in chemistry solver (GCHP) Zhouran Sun (WashU) Chemistry +
Performance
Active chemistry in mesosphere for both GCHP and GCClassic Helena McDonald (MIT)
Sebastian Eastham (ICL) 		Chemistry
Updated aromatic oxidation Stephen MacFarlane (Wollongong)
Jenny Fisher (Wollongong) 		Chemistry
MCO3 uptake by cloud forming MP; leading to lower PAN Laura Yang (Harvard) Chemistry
Implement isotope simulation for CH4 in the carbon simulation Lee Murray (Rochester) Chemistry
  • Will have to change negative emissions from soil to a first-order loss process
Documentation for adding additional aerosol species Connor Barker (UCL) Documentation
Column diagnostics Lizzie Lundgren (Harvard)
Viral Shah (GMAO) 		Diagnostics
TOMAS rate diagnostics -- improve performance Betty Croft (WashU/Dal) Diagnostics +
Performance
Archive gamma values from heterogeneous chemistry Bob Yantosca (Harvard) Diagnostics
RRTMG Documentation GCST Documentation
Canopy Physics Model Sam Silva (MIT) Dry Deposition
Dry deposition diagnostics by land cover Holly Nowell (FSU)
Chris Holmes (FSU) 		Dry Deposition
Dry deposition process diagnostics Holly Nowell (FSU)
Chris Holmes (FSU) 		Dry Deposition
Biomass burning for TOMAS Nicole June (CSU) Emissions +
Microphysics
Historic biomass burning (1750-2010) Pengfei Liu (Georgia Tech) Emissions
Rice methane emissions Zichong Cheng (Harvard) Emissions+
Carbon simulation
Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3) Tia Scarpelli (Carbon Mapper)
Melissa Sulprizio (Harvard) 		Emissions
New prior CO2 biospheric fluxes from CMS-FLUX and GMAO Kevin Bowman (JPL)
Lesley Ott (GMAO) 		Emissions
  • GMAO can provide high-resolution fluxes (as high as 12 km)
Snowpack Br2 emission Chris Holmes (FSU) Emissions
EDGAR v8.1_toxHg emissions for 1970-2022 Eric Roy (MIT) Emissions
Improve pressure handling in GCHP advection Yuanjian Zhang (WashU)
Seb Eastham (ICL) 		GCHP
Add error trap for duplicate scale factors in HEMCO Bob Yantosca (Harvard) HEMCO
Integration testing: Add stretched grid Lizzie Lundgren (Harvard) Quality Assurance
Integration testing: Add GCHP mass flux run Lizzie Lundgren (Harvard) Quality Assurance
Integration testing: Add run with all diagnostics turned on GCST Quality Assurance
Integration testing: Reinstate TOMAS40 Betty Croft (Dalhousie/WashU) Quality Assurance
Strat-adjusted RF in GCC and GCHP Connor Barker (UCL)
Eloise Marais (UCL) 		Radiation
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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