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.


=== 13.1.0 ===
{| 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 13.1.0]] 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 ==
|}


=== 13.2.0 ===
== Feature integration in progress ==


See also the [https://github.com/geoschem/geos-chem/milestone/18 13.2.0 milestone on Github].
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.  


This version will require a 1-month full-chemistry benchmark and 1-year full-chemistry and transport tracer benchmarks, with and without Luo wet deposition.
{| 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="300px"|Notes and References
 
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/1288 New soil NOx parameterization]
|Yi Wang (U. Iowa)<br>Jun Wang (U. Iowa)
|Emissions
|Medium
|
*[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  
{| 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"
|ALK4 & R4N2 chemistry
|Jared Brewer (UMN)
|Chemistry
|TBD
|Not delivered
|
*[https://github.com/geoschem/geos-chem/issues/1625 geos-chem issue #1625]
*[https://acmg.seas.harvard.edu/files/acmg/files/brewer2022.pdf Brewer, J.F. et al., J. Geophys. Res., 2023.]


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/547 Update US emissions to NEI2016]
|Mass flux regridding fix in MAPL
|Barron Henderson (EPA)<br>Lyssa Freese (MIT)
|Tom Clune (GMAO)<br>Seb Eastham (MIT)
|Science
|GCHP input regridding
|Medium
|
|
*[https://github.com/geoschem/GCHP/issues/377 GCHP Issue #377]
*'''Currently on hold, as the submitted update results in zero diff'''
 
|-valign="top"
|New version of CEDS at 0.1 deg
|Dandan Zhang (WashU)
|Emissions
|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"
|Remove differences in GC-Classic due to HEMCO reading REAL8 restart as REAL4
|Lizzie Lundgren (Harvard)
|GC-Classic
|Medium
|
|
|
*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/HEMCO/issues/18 hemco issue #18]


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2569/2020/ Canopy Physics Model]
|Capture all trop and PBL height changes in budget diagnostics
|Sam Silva (MIT)
|Chris Holmes (FSU)<br>Lizzie Lundgren (Harvard)
|Science
|Diagnostics
|Medium
|Delivered
|
|
*[https://github.com/geoschem/geos-chem/pull/2103 geos-chem PR 2103]
|}
== 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.
{| border=1 cellspacing=0 cellpadding=5
|-bgcolor="#CCCCCC"
!width="200px"|Feature
!width="200px"|Contributor(s)
!width="100px"|Model scope
!width="100px"|Delivery status
!width="300px"|Notes and References


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/preprints/gmd-2020-380/ Dust emissions from Meng et al. (in review)]
|KORUS-AQ emissions for East Asia (as an option)
|Jun Meng (WUStL)
|Katie Travis (NASA)
|Scince
|Emissions
|Simple
|
|


|-valign="top"
|-valign="top"
|Fix stratospheric flooding
|Geologic emission of ethane and propane
|Sebastian Eastham (MIT)
|Matthew Rowlinson and Mat Evans(York)
|Bug fix
|Emissions
|Delivered<br>Jan 2023
|
|
*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


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2879/2020/ Improved wet scavenging from Luo et al. (2020)] (as option)
|[https://github.com/geoschem/geos-chem/pull/629 Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange]
|Gan Luo (Albany)<br>Fangqun Yu (Albany)
|Joey Lam(CUHK)<br>Amos Tai (CUHK)
|Science
|Science
|Delivered<br>Feb 2021
|
|
*Delivered to GCST (Nov 2020)
*[https://github.com/geoschem/geos-chem/pull/629 geos-chem PR #629]
*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"
|-valign="top"
|[http://globalchange.bnu.edu.cn/research/laiv6 Updated Yuan/BNU MODIS LAI product (2000-2019)]
|LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100
|Jenny Fisher (U. Wollongong)
|Yang Li (Baylor University)<br>Loretta Mickley (Harvard)
|Science
|Emissions
|Delivered<br>Jul 2021
|
*Data involves many files- need to think about temporal frequency
 
|-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
|
|
*Processing scripts delivered to GCST (Aug 2020)
*[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


|-valign="top"
|-valign="top"
|[https://acp.copernicus.org/articles/21/1861/2021/ Updated Rn-222 emissions]
|DMS Chemistry
|Bo Zhang
|Linia Tashmim (UC Riverside)<br>William Porter (UC Riverside)
|Science
|Chemistry
|Not delivered
|
|
*The existing Rn emissions will remain as an option
*Data are available at https://doi.org/10.5281/zenodo.3942287


|-valign="top"
|-valign="top"
|[[Grid-independent_emissions|Updated offline emissions]]
|Organic acids (RCOOH)
|Katie Travis (NASA)
|Chemistry
|Not delivered
|
|
|Science
 
|-valign="top"
|Improve carbon & nitrogen conservation in reactions
|Kelvin Bates (Harvard)
|Chemistry
|Not delivered
|
|


|-valign="top"
|-valign="top"
|Provide recommended rather than hard-coded scaling factors for online emissions
|Blowing snow sea salt in TOMAS
|GCST
|Betty Croft (Dalhousie)
|Science
|Aerosols
|Not delivered
|
|


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/331 Provide climatologies for lightning NOx, volcano, and open fire emissions]
|[https://pubs.rsc.org/en/content/articlelanding/2022/EM/D2EM00019A Australian anthropogenic Hg emissions]
|GCST
|Stephen MacFarlane (UOW)<br>Jenny Fisher (UOW)<br> Hannah Horowitz (U. Illinois)<br>Viral Shah (Harvard)
|Science
|Hg simulation
|Not delivered
|
|


|-valign="top"
|-valign="top"
|[https://www.sciencedirect.com/science/article/abs/pii/S1352231019305138?via%3Dihub Trace metal simulation]
|WRF-GC Hg simulation
|Junwei Xu (Dalhousie)
|Xiaotian Xu (Nanjing U.)<br>Yanxu Zhang (Nanjing U.)
|Science
|Hg simulation<br>WRF-GC
|Not delivered
|
|
*Delivered to GCST (Nov 2020)
*See [https://github.com/geoschem/geos-chem/pull/511 geoschem/geos-chem PR #511]


|-
|-valign="top"
!colspan="4" bgcolor="#CCFFFF"|Features only affecting GCHP:
|Updated HgII gas-partical partitioning
|Kaiyun Liu (Tsinghua U.)<br>Qingru Wu (Tsinghua U.)<br>Shuxiao Wang (Tsinghua U.)
|Hg simulation
|Not delivered
|
*Should be option, not default


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/GCHP/issues/92 Update advection library versions]
|Dry deposition to F90 (readability)
|Lizzie Lundgren (GCST)
|Chris Holmes (FSU)
|Science
|Dry deposition
|Not delivered
|
|


|}
|}


=== 13.3.0 ===
== Almost there (< 6 months) ==


See also the [https://github.com/geoschem/geos-chem/milestone/19 13.3.0 milestone on Github].
Features listed in this table are in development and will likely be delivered to the GEOS-Chem Support Team within the next 6 months.


This version will require a 1-month and 1-year full-chemistry benchmarks, with and without the adaptive chemical solver.
{|border=1 cellspacing=0 cellpadding=5
|- bgcolor="#cccccc"
!width="200px"|Feature
!width="200px"|Contributor(s)
!width="100px"|Model scope
!width="420px"|Notes and References


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|-bgcolor="#CCCCCC"
|PPN+hv, PPN+OH
!width="500px"|Feature
|Robert Ryan (UCL)
!width="200px"|Submitted by
|Chemistry
!width="100px"|Type
|
!width="300px"|Notes


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/560 C2H4 and C2H2 chemistry]
|MBO
|Kelvin Bates (Harvard)<br>Ke Li (Harvard)
|Michael Vermeuel (UMN)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|[http://acmg.seas.harvard.edu/publications/2020/moch_2020_hms_global.pdf HMS chemistry]
|Initial conditions for CH4 correcting background and stratospheric biases
|Jonathan Moch (Harvard)
|Todd Mooring (Harvard)
|Science
|Methane simulation
|
|
*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]
|Migrating simple SOA formation from carbon_mod.F90 into the KPP "full-chemistry" mechanism
|Lyatt Jaegle (UW)
|Bob Yantosca (Harvard)
|Science
|Aerosols<br>Structural
|
|
*Delivered to GCST (Jun 2020)
*Ongoing
*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]
|Re-binning of off-line sea salt and dust for use in TOMAS
|Jeff Pierce (CSU)
|Betty Croft (Dalhousie)
|Science
|Aerosols
|
|
*See [https://github.com/geoschem/geos-chem/issues/604 geoschem/geos-chem #604]


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2475/2020/gmd-13-2475-2020.pdf Adaptive chemical solver] (as option)
|Adaption of TOMAS' in-cloud aqueous sulfate production for KPP versus sulfate_mod.F90
|Lu Shen (Harvard)
|Betty Croft (Dalhousie)
|Science
|Aerosols
|
|


|-valign="top"
|-valign="top"
|[https://acp.copernicus.org/articles/19/7055/2019/ Joint CO2-CO-CH4-OCS simulation]
|ML algorithms for bulk aerosols
|Beata Bukosa (NIWA)<br>GCST
|Arshad Nair (SUNY Albany)<br>Fangqun Yu (SUNY Albany)
|Science
|Aerosols
|
|
*See [https://github.com/geoschem/geos-chem/issues/654 geoschem/geos-chem #654]


|}
|-valign="top"
|PM2.5 and PM10 calculations: aerodynamic vs geometric diameters
|Shixian Zhai (Harvard)
|Aerosols
|


== Priorities not yet assigned to a particular version ==
|-valign="top"
|Updates to Hodzic SOA scheme
|Jared Brewer (Harvard)
|Aerosols
|


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"
|Automated reduction in isoprene scheme
|Dan Westervelt (Lamont-Doherty)
|Aerosols
|


=== Ready to go in ===
|-valign="top"
|Brown carbon chemsitry
|Jingqiu Mao (U. Alaska)<br>Xuan Wang (CUHK)
|Aerosols
|


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|-bgcolor="#CCCCCC"
|GEOS resolution and subgrid convection - Part 2 RAS parameter tuning
!width="500px"|Feature
|Tailong He (Toronto)<br>Dylan Jones (Toronto)<br>Andrea Molod (NASA GMAO)
!width="200px"|Submitted by
|Convection
!width="100px"|Type
|
!width="300px"|Notes


|-valign="top"
|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


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/559 Implement H2 chemistry in UCX]
|Updated biomass burning emission factors and species
|Chris Holmes (FSU)
|Tess Carter (MIT)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|[https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2006GL026015 Stratospheric HCN chemistry]
|Updated offline sea salt emissions
|Armin Kleinbohl (JPL)<br>Debra Weisenstein (Harvard, retired)
|Hongjian Weng (PKU) <br> Jintai Lin (PKU)
|Science
|Emissions
|
|
*Delivered to GCST (Jun 2020)


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2569/2020/ MEGAN3]
|[https://gmd.copernicus.org/articles/13/2569/2020/ Canopy Physics Model]
|Sam Silva (MIT)
|Sam Silva (MIT)
|Science
|Emissions &<br>Science
|
|
*Implementation details may be found at https://zenodo.org/record/3614062#.XzvrH5NKjOR
*DOI: [https://zenodo.org/record/3614062#.XzvrH5NKjOR 10.5281/zenodo.3614062]
*Needs to be updated to a more recent GEOS-Chem version


|-valign="top"
|-valign="top"
|[https://acp.copernicus.org/articles/17/3699/2017/ GC-YIBs biosphere-atmospheric chemistry coupled model]
|Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone
|Xu Yue (NUIST)
|Bob Yantosca (Harvard)
|Science
|Model performance
|
|
*See [https://github.com/geoschem/geos-chem/issues/425 geoschem/geos-chem #425]
*Ongoing (will be done as time allows)


|-valign="top"
|-valign="top"
|[http://acmg.seas.harvard.edu/presentations/IGC9/posters/Tue_Posters_lam_joey.pdf Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange]
|Assess memory leak in GCHP
|Joey Lam(CUHK)<br>Amos Tai (CUHK)
|Killian Murphy (York)
|Science
|Model performance
|
|
*Delivered to GCST (Feb 2021)
*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.
*See [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]]
|Hybrid MPI-OpenMP in GCHP
|Sebastian Eastham (MIT)<br>Eric Fleming (NASA GMAO)
|Seb Eastham (MIT)<br>Killian Murphy (York)
|Science
|Model performance
|
|


|-valign="top"
|Improve pressure handling in GCHP advection
|Seb Eastham (MIT)<br>Yuanjian Zhang (WashU)
|GCHP
|


|-valign="top"
|-valign="top"
|Archived CMIP6 Met Products for GEOS-Chem Input
|Use ExtData2G as default GCHP input module
|Lee Murray (Rochester)
|Lizzie Lundgren (Harvard)
|Science
|GCHP
|
|Will replace ExtData.rc with yaml file
*See updates from [http://acmg.seas.harvard.edu/geos/word_pdf_docs/steering_cmte/gc_sc_minutes_24Feb2021.pdf Feb 2021 GCSC meeting]
*Official announcement coming soon


|}
|}


=== Almost there (< 6 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"
|-valign="top"
|Fix stratospheric flooding
|Snow / Icy Bromine
|Sebastian Eastham (MIT)
|Becky Alexander (UW)<br>William Swanson (U. Alaska)<br>Shuting Zhai (UW)
|Science/Bug fix
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Diagnostic to archive XCO2, XCO, and XCH4
|Monoterpene oxidation scheme
|Dylan Jones (Toronto)
|Jessica Haskins (MIT)
|Science
|Chemistry
|
 
|-valign="top"
|Fire related VOCs including furans
|Lu Hu (UMT)<br>Lixu Jin (UMT)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Provide archived TCR-2 GEOS-Chem OH fields for carbon simulations
|Extension of UCX into the mesosphere
|Kazu Miyazaki (JPL)
|Seb Eastham (MIT)<br>Eric Fleming (NASA)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Aromatic VOC chemistry
|Methane flux ingestion
|Kelvin Bates (Harvard)<br>Ke Li (Harvard)
|Eloise Marais (UCL)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|BrC aging
|Dust non-sphericity impacts on surface chem and optical properties
|Xuan Wang (Harvard)<br>Melanie Hammer(Dalhousie)
|Inderjeet Singh (WashU)
|Science
|Aerosols
|
|


|-valign="top"
|-valign="top"
|One-Way Coupling w/ GISS ModelE3
|Size-resolved stratospheric aerosol
|Lee Murray (Rochester)
|Seb Eastham (MIT)
|Structural
|Aerosols
|
|
*Work is finished and a manuscript is in preparation


|-valign="top"
|-valign="top"
|Shared Socioeconomic Pathways Emission Inventories
|Extend aerosol settling
|Hong Liao (NUIST)
|Eloise Marais (UCL)
|Science
|Aerosols
|
|


|-valign="top"
|Stratospheric aerosol APM
|Fangqun Yu (SUNY)
|Aerosols
|


|-valign="top"
|-valign="top"
|Rediagnosis of RAS convection in GEOS-Chem
|Plume-in-grid model
|Tailong He (Toronto)<br>Dylan Jones (Toronto)<br>Andrea Molod (NASA/GMAO)
|Hongwei Sun (Harvard)
|Science
|Chemistry
|
|
*Work is finished and a manuscript is in preparation.


|-valign="top"
|-valign="top"
|Read-in of native GEOS output in GCHP
|Updated lightning NOx: Prescribe from ground and geostationary lightning flashes
|WUStL GCST
|Lee Murray (Rochester)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|Adoption of the Spack package manager for dependency management
|Seb aircraft emissions beyond recent 2019 update
|Harvard GCST
|Seb Eastham (MIT)
|Structural
|Emissions
|
|


|-valign="top"
|-valign="top"
|Modularization of GEOS-Chem: FAST-JX as proof-of-concept
|FRP-based fire emsisions for eastern US at 0.2 deg
|NASA GMAO
|Charlie Fite (FSU)
|Structural
|Emissions
|
|


|}
|-valign="top"
|Hg iodine chemistry
|Yiming Fu<br>Yanxu Zhang (Nanjing U.)
|Hg simulation
|


=== Over the horizon (6-12 months) ===
|-valign="top"
|Hg simulation in GCHP
|Ari Feinberg (MIT)<br>Lyssa Freese (MIT)
|Hg simulation
|


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|- bgcolor="#cccccc"
|Update Hg ocean and soil boundary conditions for consistency with new chemistry
!width="500px"|Item
|Yanxu Zhang (Nanjing U.)
!width="200px"|Author(s)
|Hg simulation
!width="100px"|Type
|
!width="300px"|Notes


|-valign="top"
|-valign="top"
|Update OCS simulation in the standard code
|Dry deposition diagnostics by land cover
|Kevin Bowman (JPL)
|Holly Nowell (FSU)
|Science
|Diagnostics
|
|


|-valign="top"
|-valign="top"
|Methylethylketone chemistry
|Dry deposition process diagnostics
|Jared Brewer (CSU)
|Holly Nowell (FSU)
|Science
|Diagnostics
|
|


|-valign="top"
|-valign="top"
|Add sulfate dependence to SOA yield from isoprene in simple SOA
|Isotope simulation for CO and CH4 in GCHP
|Eloise Marais (Leicester)
|Lee Murray (Rochester)
|Science
|Carbon simulation
|
|


|-valign="top"
|-valign="top"
|Updated Hg chemistry:
|Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3)
*Streamlining of Hg simulation through HEMCO and KPP
|Melissa Sulprizio (Harvard)<br>Tia Scarpelli (U. Edinburgh)<br>Zichong Chen (Harvard)
*Hg gas-phase photo-reduction
|Emissions<br>CH4 simulation
|Viral Shah (Harvard)<br>Colin Thackray (Harvard)
|Science
|
|


|-valign="top"
|-valign="top"
|GTMM updates
|Modularization of aerosols code for interface with GOCART in GEOS
|Ben Geyman (Harvard)
|Christoph Keller (GMAO)
|Science
|Structural
|
|


|-valign="top"
|-valign="top"
|Landcover/Fire Emissions Offline LPJlmfire
|Improve load balancing in GCHP
|Loretta Mickley (Harvard)
|Seb Eastham (MIT)
|Science
|Model performance
|
|


|-valign="top"
|-valign="top"
|[https://www.pnas.org/content/117/42/26076 Aerosol dry deposition updates]
|Testing the use of monthly mean MERRA-2 CWC with Pb-210 aerosol tracer
|Jeff Pierce (CSU)
|Bo Zhang (NIA)<br>Hongyu Liu (NIA / NASA Langley)
|Science
|Transport
|
|


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/GCHP/issues/19 Integrating GMAO's tracer gridded component in GCHP]
|Testing the use of a new scavenging parameterization developed by Luo and Yu for cold cloud with Pb-210 aerosol tracer
|Christoph Keller (NASA GMAO)
|Gan Luo (SUNY Albany)<br>Fangqun Yu (SUNY-Albany)
|Structural
|Transport
|
|


|-valign="top"
|-valign="top"
|Mass flux-based transport in GCHP
|Evaluate vertical mixing in GEOS-Chem with model-model and model-observation comparisons
|Sebastian Eastham (MIT)
|Seb Eastham (MIT)<br>Clara Orbe (NASA GISS)<br>Andrew Schuh (CSU)
|Science
|Transport
|
|


|-valign="top"
|-valign="top"
|Streamlining of specialty simulations through HEMCO and KPP
|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
|GCST
|Science
|Benchmarking
|
|


|}
|}


=== 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"
|Updates to Aromatic chemistry
|Stephen MacFarlane (UOW)<br>Jenny Fisher (UOW)
|Chemistry
|
 
|-valign="top"
|Nitrate photolysis
|Mat Evans (York)<br>Thomas Sherwen (York)<br>Matthew Rowlinson (York)
|Chemistry
|


|-valign="top"
|-valign="top"
|GCHP Adjoint
|In aerosol chemistry Halogens
|Daven Henze (CU Boulder)
|Mat Evans (York)<br>Hansen Cao (CU Boulder)
|Science
|Chemistry
|
 
|-valign="top"
|Benchmark box model of GC Chemistry
|Katie Travis (NASA)
|Chemistry
|
 
|-valign="top"
|Alkyl nitrates Alk7, PHAN
|Katie Travis (NASA)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Implement isotope simulation for CO and CH4 in GCHP
|Add stratospheric ozone species to full-chemistry simulations
|Lee Murray (Rochester)
|Lee Murray (Rochester)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Migrate LETFK DA scheme to GCHP
|Perchlorate chemistry
|Kazu Miyazaki (JPL)
|Yuk Chun Chan (UWAB)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Super fast chemistry scheme
|Explicit heterogeneous sulfate chemistry
|Benjamin Brown-Steiner (AER)<br>Makoto Kelp (Harvard)
|Katie Travis (NASA)<br>Becky Alexander (UT)
|Science
|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
|HOx and ozone "emissions" from lightning as option in model to play with
|Becky Alexander (UW)
|Jingqiu (Alaska)<br>Lee Murray (Rochester)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|DMS oxidation scheme updating
|Sea salt aerosol from sea ice leads
|Becky Alexander (UW)<br>Qianjie Chen (UW)
|Hannah Horowitz (U. Illinois)
|Science
|Emissions
|
|
*Delayed - implemented pre-KPP
*Currently bring implemented in KPP by UC Riverside group


|-valign="top"
|-valign="top"
|Heterogeneous sulfate production
|Drought-stress algorithm
|Lin Zhang (PKU)<br>Becky Alexander (UW)<br>Yuxuan Wang (U. Houston)
|Wei Li (U. Houston)
|Science
|
|
|
*Delayed - implemented pre-KPP


|-valign="top"
|-valign="top"
|Hg in WRF-GC
|Biomass burning injection height profiles
|Yanxu Zhang (Nanjing)
|Inderjeet Singh (WashU)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|Hg with blowing snow
|OCIM integration
|Yanxu Xhang (Nanjing)
|Chris Holmes (FSU)<br>Lee Murray (Rochester)
|Science
|
|
|


|-valign="top"
|-valign="top"
|Hg isotopes
|Updating landcover products in GEOS-Chem
|Xiaotian Xu, Yanxu Xhang (Nanjing)
|Chris Holmes (FSU)<br>Jeff Geddes (BU)
|Science
|Input data
|
|


|-valign="top"
|-valign="top"
|Hg in CESM CAM-CHEM
|Dry deposition physical improvement
|Peng Zhang, Yanxu Xhang (Nanjing)
|Chris Holmes (FSU)
|Science
|Dry deposition
|
|


|-valign="top"
|-valign="top"
|Complex / multicomplex variables
|TOMAS WRF-GC in regional Thailand simulation
|Shannon Capps (Drexel)
|Win Trivitayanurak (Chulalongkorn U)
|Structural
|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
Retrieved from "https://wiki.seas.harvard.edu/geos-chem/index.php?title=GEOS-Chem_model_development_priorities&oldid=53758"