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 ==


We also invite you to view our [https://trello.com/board/geos-chem-support-team/4fe36668fc79a1d3540ba80b GEOS-Chem Support Team project management board on Trello.com], which shows the current GCST workflow.
See the links below for items merged and awaiting release.


== Priorities assigned to upcoming GEOS-Chem versions ==
{| border=1 cellspacing=0 cellpadding=5
|-bgcolor="#CCCCCC"
!width="300px"|Mergeable at any time
!width="200px"|Version in development


=== 13.0.0 ===
|-valign="top"
|align="center"|'''[[GEOS-Chem no-diff-to-benchmark]]'''
|align="center"|'''[[GEOS-Chem 14.5.0]]'''


<span style="color:darkorange">'''This version is now under development. See the [[GEOS-Chem 13.0.0]] page for more details.'''''</span>
|}


== Priorities not yet assigned to a particular version ==
== Feature integration in progress ==
 
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
|-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
 
|}


The following items have been identified as priorities for GEOS-Chem, but have not yet been assigned to a particular GEOS-Chem version.
== Prioritized and in the queue ==


=== Ready to go in ===
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://gmd.copernicus.org/articles/13/2879/2020/ Improved wet scavenging from Luo et al. (2020)]
|Mass flux regridding fix in MAPL
|Gan Luo (Albany)<br>Fangqun Yu (Albany)
|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
|
|
|
*Delivered to GCST (Nov 2020)
*[https://github.com/geoschem/HEMCO/issues/18 hemco issue #18]
*See [https://github.com/geoschem/geos-chem/pull/522 geoschem/geos-chem PR #522]


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/559 Implement H2 chemistry in UCX]
|Capture all trop and PBL height changes in budget diagnostics
|Chris Holmes (FSU)
|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://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2006GL026015 Stratospheric HCN chemistry]
|KORUS-AQ emissions for East Asia (as an option)
|Armin Kleinbohl (JPL)<br>Debra Weisenstein (Harvard, retired)
|Katie Travis (NASA)
|Science
|Emissions
|Simple
|
|
*Delivered to GCST (Jun 2020)


|-valign="top"
|-valign="top"
|[http://acmg.seas.harvard.edu/publications/2020/moch_HMS_submitted_2020.pdf HMS chemistry]
|Geologic emission of ethane and propane
|Jonathan Moch (Harvard)
|Matthew Rowlinson and Mat Evans(York)
|Science
|Emissions
|Delivered<br>Jan 2023
|
|
*Delivered to GCST (Sep 2020)
*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
*See [https://github.com/geoschem/geos-chem/pull/456 geoschem/geos-chem PR #456]


|-valign="top"
|-valign="top"
|[https://www.sciencedirect.com/science/article/abs/pii/S1352231019305138?via%3Dihub Trace metal simulation]
|[https://github.com/geoschem/geos-chem/pull/629 Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange]
|Junwei Xu (Dalhousie)
|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/511 geoschem/geos-chem PR #511]


|-
|-valign="top"
|[https://acp.copernicus.org/articles/17/3699/2017/ Blowing snow emissions of sea salt and bromine]
|LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100
|Lyatt Jaegle (UW)
|Yang Li (Baylor University)<br>Loretta Mickley (Harvard)
|Science
|Emissions
|Delivered<br>Jul 2021
|
|
*Delivered to GCST (Jun 2020)
*Data involves many files- need to think about temporal frequency
*See [https://github.com/geoschem/geos-chem/pull/356 geoschem/geos-chem PR #356]


|-valign="top"
|-valign="top"
|[http://globalchange.bnu.edu.cn/research/laiv6 Updated Yuan/BNU MODIS LAI product (2000-2019)]
|[https://github.com/geoschem/geos-chem/issues/1867 Online H2 chemistry]
|Jenny Fisher (U. Wollongong)
|Maria Paula Pérez-Peña (UNSW)<br>Jenny Fisher (UOW)<br>Dylan Millet (UMN)
|Science
|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://gmd.copernicus.org/articles/13/2569/2020/ MEGAN3]
|DMS Chemistry
|Sam Silva (MIT)
|Linia Tashmim (UC Riverside)<br>William Porter (UC Riverside)
|Science
|Chemistry
|Not delivered
|
|
*Implementation details may be found at https://zenodo.org/record/3614062#.XzvrH5NKjOR


|-valign="top"
|-valign="top"
|[https://gmd.copernicus.org/articles/13/2569/2020/ Canopy Physics Model]
|Organic acids (RCOOH)
|Sam Silva (MIT)
|Katie Travis (NASA)
|Structural
|Chemistry
|Not delivered
|
|


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/547 Update US emissions to NEI2016]
|Improve carbon & nitrogen conservation in reactions
|Barron Henderson (EPA)<br>Lyssa Freese (MIT)
|Kelvin Bates (Harvard)
|Science
|Chemistry
|Not delivered
|
|
*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."


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/HEMCO/issues/46 Distribute emissions vertically in the boundary layer]
|Blowing snow sea salt in TOMAS
|Barron Henderson (EPA)<br>GCST
|Betty Croft (Dalhousie)
|Structural &<br>Science
|Aerosols
|Not delivered
|
|
*Vertical profiles have been delivered to GCST


|-valign="top"
|-valign="top"
|[https://acp.copernicus.org/articles/17/3699/2017/ 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
|Not delivered
|
|
*See [https://github.com/geoschem/geos-chem/pull/356 geoschem/geos-chem #356]


|-valign="top"
|-valign="top"
|C2H4 and C2H2 chemistry
|WRF-GC Hg simulation
|Kelvin Bates (Harvard)<br>Ke Li (Harvard)
|Xiaotian Xu (Nanjing U.)<br>Yanxu Zhang (Nanjing U.)
|Science
|Hg simulation<br>WRF-GC
|Not delivered
|
|


|-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.)
|Science
|Hg simulation
|Not delivered
|
|
*Should be option, not default


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/issues/331 Provide climatologies for lightning NOx, volcano, and open fire emissions]
|Dry deposition to F90 (readability)
|GCST
|Chris Holmes (FSU)
|Science
|Dry deposition
|Not delivered
|
|


|}
|}


=== 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"
|PPN+hv, PPN+OH
|Robert Ryan (UCL)
|Chemistry
|
 
|-valign="top"
|MBO
|Michael Vermeuel (UMN)
|Chemistry
|
 
|-valign="top"
|Initial conditions for CH4 correcting background and stratospheric biases
|Todd Mooring (Harvard)
|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"
|ML algorithms for bulk aerosols
|Arshad Nair (SUNY Albany)<br>Fangqun Yu (SUNY Albany)
|Aerosols
|
 
|-valign="top"
|PM2.5 and PM10 calculations: aerodynamic vs geometric diameters
|Shixian Zhai (Harvard)
|Aerosols
|
 
|-valign="top"
|Updates to Hodzic SOA scheme
|Jared Brewer (Harvard)
|Aerosols
|
 
|-valign="top"
|Automated reduction in isoprene scheme
|Dan Westervelt (Lamont-Doherty)
|Aerosols
|


|-valign="top"
|-valign="top"
|Diagnostic to archive XCO2, XCO, and XCH4
|Brown carbon chemsitry
|Dylan Jones (Toronto)
|Jingqiu Mao (U. Alaska)<br>Xuan Wang (CUHK)
|Science
|Aerosols
|
|


|-valign="top"
|-valign="top"
|Provide archived TCR-2 GEOS-Chem OH fields for carbon simulations
|GEOS resolution and subgrid convection - Part 2 RAS parameter tuning
|Kazu Miyazaki (JPL)
|Tailong He (Toronto)<br>Dylan Jones (Toronto)<br>Andrea Molod (NASA GMAO)
|Science
|Convection
|
|


|-valign="top"
|-valign="top"
|Aromatic VOC chemistry
|High-res top-down TROPOMI-derived seasonal mean NOx emissions for China
|Kelvin Bates (Harvard)<br>Ke Li (Harvard)
|Jintai Lin (PKU)
|Science
|Emissions
|''Status updated Sep 2020''
|
*Horizontal resolution: 5km, temporal resolution: JJA mean
*monthly data will be available at a later stage; please contact us


|-valign="top"
|-valign="top"
|BrC aging
|Updated biomass burning emission factors and species
|Xuan Wang (Harvard)<br>Melanie Hammer(Dalhousie)
|Tess Carter (MIT)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|One-Way Coupling w/ GISS ModelE3
|Updated offline sea salt emissions
|Lee Murray (Rochester)
|Hongjian Weng (PKU) <br> Jintai Lin (PKU)
|Structural
|Emissions
|''Status updated Aug 2020''
|
*Work is finished and a manuscript is in preparation


|-valign="top"
|-valign="top"
|Shared Socioeconomic Pathways Emission Inventories
|[https://gmd.copernicus.org/articles/13/2569/2020/ Canopy Physics Model]
|Hong Liao (NUIST)
|Sam Silva (MIT)
|Science
|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"
|-valign="top"
|Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange
|Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone
|Amos Tai (CUHK)
|Bob Yantosca (Harvard)
|Science
|Model performance
|''Status updated Aug 2020''
|
*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"
|-valign="top"
|Rediagnosis of RAS convection in GEOS-Chem
|Hybrid MPI-OpenMP in GCHP
|Tailong He (Toronto)<br>Dylan Jones (Toronto)<br>Andrea Molod (NASA/GMAO)
|Seb Eastham (MIT)<br>Killian Murphy (York)
|Science
|Model performance
|''Status updated Aug 2020''
|
*Work is finished and a manuscript is in preparation.


|-valign="top"
|-valign="top"
|Read-in of native GEOS output in GCHP
|Improve pressure handling in GCHP advection
|WUStL GCST
|Seb Eastham (MIT)<br>Yuanjian Zhang (WashU)
|Science
|GCHP
|''Status updated Sep 2020''
|


|-valign="top"
|-valign="top"
|Adoption of the Spack package manager for dependency management
|Use ExtData2G as default GCHP input module
|Harvard GCST
|Lizzie Lundgren (Harvard)
|Structural
|GCHP
|''Status updated Sep 2020''
|Will replace ExtData.rc with yaml file


|}
|}


=== 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"
|Snow / Icy Bromine
|Becky Alexander (UW)<br>William Swanson (U. Alaska)<br>Shuting Zhai (UW)
|Chemistry
|
 
|-valign="top"
|Monoterpene oxidation scheme
|Jessica Haskins (MIT)
|Chemistry
|
 
|-valign="top"
|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)
|Chemistry
|
 
|-valign="top"
|Dust non-sphericity impacts on surface chem and optical properties
|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
|


|-valign="top"
|-valign="top"
|Update OCS simulation in the standard code
|Hg simulation in GCHP
|Kevin Bowman (JPL)
|Ari Feinberg (MIT)<br>Lyssa Freese (MIT)
|Science
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Methylethylketone chemistry
|Update Hg ocean and soil boundary conditions for consistency with new chemistry
|Jared Brewer (CSU)
|Yanxu Zhang (Nanjing U.)
|Science
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Add sulfate dependence to SOA yield from isoprene in simple SOA
|Dry deposition diagnostics by land cover
|Eloise Marais (Leicester)
|Holly Nowell (FSU)
|Science
|Diagnostics
|
|


|-valign="top"
|-valign="top"
|Updated Hg chemistry:
|Dry deposition process diagnostics
*Streamlining of Hg simulation through HEMCO and KPP
|Holly Nowell (FSU)
*Hg gas-phase photo-reduction
|Diagnostics
|Viral Shah (Harvard)<br>Colin Thackray (Harvard)
|
|Science
|''Status updated July 2020''


|-valign="top"
|-valign="top"
|GTMM updates
|Isotope simulation for CO and CH4 in GCHP
|Ben Geyman (Harvard)
|Lee Murray (Rochester)
|Science
|Carbon simulation
|''Status updated Aug 2020''
|


|-valign="top"
|-valign="top"
|Landcover/Fire Emissions Offline LPJlmfire
|Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3)
|Loretta Mickley (Harvard)
|Melissa Sulprizio (Harvard)<br>Tia Scarpelli (U. Edinburgh)<br>Zichong Chen (Harvard)
|Science
|Emissions<br>CH4 simulation
|
|


|-valign="top"
|-valign="top"
|Integrating GMAO's tracer gridded component in GCHP
|Modularization of aerosols code for interface with GOCART in GEOS
|Sebastian Eastham (MIT)
|Christoph Keller (GMAO)
|Structural
|Structural
|''Status updated Sep 2020''
|
 
|-valign="top"
|Improve load balancing in GCHP
|Seb Eastham (MIT)
|Model performance
|


|-valign="top"
|-valign="top"
|Mass flux-based transport in GCHP
|Testing the use of monthly mean MERRA-2 CWC with Pb-210 aerosol tracer
|Sebastian Eastham (MIT)
|Bo Zhang (NIA)<br>Hongyu Liu (NIA / NASA Langley)
|Science
|Transport
|''Status updated Sep 2020''
|
 
|-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"
|-valign="top"
|Streamlining of specialty simulations through HEMCO and KPP
|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"
|-valign="top"
|GCHP Adjoint
|Updates to Aromatic chemistry
|Daven Henze (CU Boulder)
|Stephen MacFarlane (UOW)<br>Jenny Fisher (UOW)
|Science
|Chemistry
|''Added Sep 2020''
|
 
|-valign="top"
|Nitrate photolysis
|Mat Evans (York)<br>Thomas Sherwen (York)<br>Matthew Rowlinson (York)
|Chemistry
|


|-valign="top"
|-valign="top"
|Implement isotope simulation for CO and CH4 in GCHP
|In aerosol chemistry Halogens
|Lee Murray (Rochester)
|Mat Evans (York)<br>Hansen Cao (CU Boulder)
|Science
|Chemistry
|
|


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


|-valign="top"
|-valign="top"
|Super fast chemistry scheme
|Alkyl nitrates Alk7, PHAN
|Benjamin Brown-Steiner (AER)<br>Makoto Kelp (Harvard)
|Katie Travis (NASA)
|Science
|Chemistry
|''Status updated Sep 2020:''
|
*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)
|Science
|Chemistry
|''Status updated Aug 2020''
|


|-valign="top"
|-valign="top"
|DMS oxidation scheme updating
|Perchlorate chemistry
|Becky Alexander (UW)<br>Qianjie Chen (UW)
|Yuk Chun Chan (UWAB)
|Science
|Chemistry
|''Status updated Aug 2020''
|
*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)
|Science
|Chemistry
|''Status updated Aug 2020''
|
*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)
|Science
|Emissions
|''Status updated Aug 2020''
|


|-valign="top"
|-valign="top"
|Hg with blowing snow
|Sea salt aerosol from sea ice leads
|Yanxu Xhang (Nanjing)
|Hannah Horowitz (U. Illinois)
|Science
|Emissions
|''Status updated Aug 2020''
|


|-valign="top"
|-valign="top"
|Hg isotopes
|Drought-stress algorithm
|Xiaotian Xu, Yanxu Xhang (Nanjing)
|Wei Li (U. Houston)
|Science
|
|''Status updated Aug 2020''
|


|-valign="top"
|-valign="top"
|Hg in CESM CAM-CHEM
|Biomass burning injection height profiles
|Peng Zhang, Yanxu Xhang (Nanjing)
|Inderjeet Singh (WashU)
|Science
|Emissions
|''Status updated Aug 2020''
|


|-valign="top"
|-valign="top"
|Complex / multicomplex variables
|OCIM integration
|Shannon Capps (Drexel)
|Chris Holmes (FSU)<br>Lee Murray (Rochester)
|Structural
|
|
|


|-valign="top"
|-valign="top"
|Archived CMIP6 Met Products for GEOS-Chem Input
|Updating landcover products in GEOS-Chem
|Lee Murray (Rochester)
|Chris Holmes (FSU)<br>Jeff Geddes (BU)
|Science
|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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