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


=== 12.4.0 ===
|-valign="top"
|align="center"|'''[[GEOS-Chem no-diff-to-benchmark]]'''
|align="center"|'''[[GEOS-Chem 14.5.0]]'''


<span style="color:darkorange">'''This version is currently in development. See [[GEOS-Chem_12#12.4.0|the ''GEOS-Chem 12'' wiki page]] for details.'''</span>
|}


=== 12.5.0 ===
== 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  
{| 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"|Status
!width="100px"|Ease of implementation
!width="300px"|Notes and References


|-valign="top
|-valign="top"
|Retire obsolete emission inventories
|New version of CEDS at 0.1 deg
|Eloise Marais (Leicester)<br>GCST
|Dandan Zhang (WashU)
|Science
|Emissions
|Simple
|
|
*[https://github.com/geoschem/geos-chem/pull/2171 geos-chem PR #2171]


|-valign="top"
|-valign="top"
|Update to MAPL v1.0.0 and ESMF v8.0.0 beta snapshot 28 in GCHP
|Use USTAR read from GEOS instead of calculating from U10M and V10M
|Lizzie Lundgren (GCST)
|Yuanjian Zhang (WashU)
|Structural
|Emissions
|Simple
|
|
*[https://github.com/geoschem/HEMCO/pull/279 HEMCO PR #279]
*NOTE: WashU will recompute mass tuning factors for each met field & resolution (GCClassic)


|-valign="top"
|-valign="top"
|Allow GEOS-Chem "Classic" netCDF (History) diagnostics to be subsetted vertically and horizontally
|Ongoing carbon simulation fixes in GCClassic and GCHP
|GCST
|GCST
|Structural
|Carbon simulation
|Medium
|
*[https://github.com/geoschem/GCHP/issues/440 GCHP issue #440]
*[https://github.com/geoschem/geos-chem/issues/2463 geos-chem issue #2463]
*[https://github.com/geoschem/geos-chem/pull/2510 geos-chem PR #2510]
 
|-valign="top"
|Investigate potential performance gains of replacing the KPP Rosenbrock solver with the LSODE solver
|Bob Yantosca (Harvard)
|Chemistry
|Medium
|
*[https://github.com/geoschem/geos-chem/pull/2482 geos-chem PR #2482]
*[https://github.com/geoschem/geos-chem/pull/2483 geos-chem PR #2483]
 
|-valign="top"
|Fix obspack - not working in 14.4.0
|Bob Yantosca (Harvard)
|Diagnostics
|Medium
|
*[https://github.com/geoschem/geos-chem/issues/2328 geos-chem issue #2328]
 
|-valign="top"
|Make GC-Classic bit-for-bit reproducible upon restart<br>(part 1 of 2)
|Lizzie Lundgren (Harvard)
|GC-Classic
|Medium
|
*[https://github.com/geoschem/geos-chem/pull/2521 geos-chem PR #2521]
 
|-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]
 
|-valign="top"
|Derive convective precipitation flux if using FP/IT generated with Grell-Freitas
|Yuanjian Zhang (WashU)<br>Viral Shah (GMAO)<br>Lizzie Lundgren (Harvard)
|Convection
|Medium
|
|
*Undergoing validation (Jun 2019)
*[https://github.com/geoschem/geos-chem/issues/2469 geos-chem Issue #2469]
*[https://github.com/geoschem/geos-chem/pull/2523 geos-chem PR #2523]


|}
|}


=== 12.6.0 ===
== Prioritized and in the queue ==


This version will require 1-month and 1-year full-chemistry benchmarks.
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"|Status
!width="100px"|Ease of implementation
!width="100px"|Delivery status
!width="300px"|Notes and References
 
|-valign="top"
|Retire CH4, CO2, tagCO simulations in favor of carbon simulation
|Melissa Sulprizio (Harvard)
|Carbon gases
|Simple
|
|
*[https://github.com/geoschem/geos-chem/issues/2387 geos-chem issue #2387]
 
|-valign="top"
|Correct the issue that injection height has been artificially decreased by HEMCO
|Lixu Jun (Montana)
|Emissions
|Simple
|Delivered<br>June 2024
|
*[https://github.com/geoschem/geos-chem/issues/2330 geos-chem issue #2330]
*[https://github.com/geoschem/geos-chem/pull/2358 geos-chem PR #2358]
 
|-valign="top"
|Capability to run GCClassic at 0.125x0.15625 resolution
|Melissa Sulprizio (Harvard)<br>Xiaolin Wang (Harvard)
|Nested grid
|Simple
|Delivered
|
*[https://github.com/geoschem/geos-chem/pull/1980 geos-chem PR #1980]
*[https://github.com/geoschem/HEMCO/pull/290 HEMCO PR #290]
 
|-valign="top"
|Strat-adjusted RF in GCC and GCHP
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|Radiation
|Simple
|Delivered
|
*[https://github.com/geoschem/geos-chem/pull/2525 geos-chem PR #2525]


|-valign="top"
|Archived TCR-2 OH fields for carbon simulations
|Kazu Miyazaki (JPL)<br>Melissa Sulprizio (Harvard)
|Input data
|Simple
|Data delivered<br>Oct 2024
|
*This will be the default OH, but users will have the option of selecting other OH fields
*[https://github.com/geoschem/geos-chem/issues/2537 geos-chem issue #2537]


|-valign="top"
|-valign="top"
|[https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018JD029133 N2O5, NO3, NO2 reactive uptake updates]
|Dust non-sphericity impacts on optical properties
|Viral Shah (UW)<br>Lyatt Jaegle (UW)<br>Chris Holmes (FSU)<br>Erin McDuffie (Dalhousie)
|Inderjeet Singh (WashU)
|Science
|Aerosols
|Medium
|Not yet delivered
|
|
*Delivered to GCST (Dec 2018)
 
|}
 
== 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 Refereneces
 


|-valign="top"
|-valign="top"
|HNO3 cold-temperature deposition
|Binary Activity Thermodynamic (BAT) model for non-ideal mixing of water and organics in organic aerosol
|Viral Shah (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"
|Bug in aerosol pH calculation when dry
|Update UCX to include gravitational settling of aerosol species beyond just BCPI
|Becky Alexander (UW)<br>Xuan Wang (Harvard)
|Conor Barker (UCL)<br>Eloise Marais (UCL)
|Science
|Aerosols
|Not delivered
|
|


|-valign="top"
|-valign="top"
|Remove isoprene in VBS (leaving aqueous)
|Seasalt aerosol from sea ice leads (2002-2011)
|GCST w/ guidance from Sid Pai (MIT)
|Hannah Horrowitz (UIUC)
|Science
|Aerosols
|Not delivered
|
|
*Offline and online, ready to go in HEMCO (optional in addition to existing seasalt emissions)


|-valign="top
|-valign="top"
|Historical biomass burning emissions (1750-2014, BCC4CMIP and LPJ-LMfire)
|Global organic N dep from various emissions; nitrate aromatics updates
|Pengfei Liu (Harvard)
|May Fu (SUSTech)
|Science
|Chemistry +<br>Deposition
|Not delivered
|
|


|-valign="top
|-valign="top"
|Checked GFED4 version used by HEMCO
|Dry deposition to F90 to improve readability
|Siddhant Pai (MIT)
|Chris Holmes (FSU)
|Science
|Dry Deposition
|Not delivered
|
|
*Older versions have bugs
*[https://github.com/geoschem/geos-chem/issues/2389 geos-chem issue #2389]


|-valign="top"
|-valign="top"
|[[Chemistry_Issues#Correcting_ozone_from_the_height_of_the_lowest_model_level_to_the_surface|Surface diagnostic (O3, HNO3) with user-selected height]]
|Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange
|Katie Travis (MIT)<br>GCST
|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"
|-valign="top"
|Updated aerosol hygroscopicity and optics
|FRP-based fire emissions for eastern US at 0.2 (2019-2020)
|Robyn Latimer (Dalhousie)<br>Jun Meng (Dalhousie)
|Chris Holmes (FSU)
|Science
|Emissions
|Not delivered
|
|
*[https://github.com/geoschem/geos-chem/issues/2388 geos-chem issue #2388]


|-valign="top"
|-valign="top"
|Simple parameterization for CO2 dependence of stomatal resistance
|China agriculture NH3 emissions
|Amos Tai (CUHK)
|Amos Tai (CUHK)
|Science
|Emissions
|Not delivered
|
 
|-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.
 
|-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
 
|-valign="top"
|LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100
|Yang Li (Baylor U)<br>Loretta Mickley (Harvard)
|Emissions
|Delivered
|
|
*Data involves many files- need to think about temporal frequency


|-valign="top"
|-valign="top"
|[https://github.com/geoschem/geos-chem/pull/32 Aerosol nitrate photolysis option] (off by default)
|Australian Hg emissions (2000-2019)
|Tomas Sherwen (York)<br>Prasad Kasibhatla (Duke)
|Stephen MacFarlane (Wollongong)<br>Jenny Fisher (Wollongong)
|Science
|Emissions
|Not delivered
|
|
*Delivered to GCST (Mar 2019)
*[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)]


=== 12.7.0 ===
|-valign="top"
|Hg biomass burning - FINN2.5 & GFED4
|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)]


This version will require a 1-month full-chemistry benchmark.
|-valign="top"
|BCC-GC online
|Lin Zhang (PKU)
|External Model
|Not delivered
|


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|-bgcolor="#CCCCCC"
|GC-YIBS with online fire emissions
!width="500px"|Feature
|Xu Yue (NUIST)<br>Hong Liao (NUIST)
!width="200px"|Submitted by
|External Model
!width="100px"|Type
|Not delivered
!width="300px"|Status
|


|-valign="top"
|-valign="top"
|Subgrid cloud NOy chemistry
|GISS-GC offline (GCAP)
|Chris Holmes (FSU)
|Lee Murray (Rochester)
|Science
|GCAP
|Not delivered
|
|


|}
|}


=== 12.8.0 ===
== Almost there (< 6 months) ==


This version will require 1-month and 1-year full-chemistry benchmarks.
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"
!width="200px"|Feature
!width="200px"|Contributor(s)
!width="100px"|Model scope
!width="420px"|Notes and References
 
|-valign="top"
|Fixes to stratospheric aerosol settling
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|Aerosols
|


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|-bgcolor="#CCCCCC"
|DMS chemistry in v14
!width="500px"|Feature
|Linia Tashmim (UCR)<br>Will Porter (UCR)
!width="200px"|Submitted by
|Chemistry
!width="100px"|Type
|
!width="300px"|Status


|-valign="top"
|-valign="top"
|Wet deposition parameterization
|KPP standalone + 3D Interface
|Kelvin Bates (Harvard)<br>GCST
|Obin Sturm (USC)
|Science
|Chemistry
|
|


|}
|-valign="top"
|NO2+OH+H2O kinetics
|Mat Evans (York)
|Chemistry
|


=== 12.9.0 ===
|-valign="top"
|LSODES solver in KPP for faster kinetics
|Haipeng Lin (Harvard)
|Chemistry
|


This version will require 1-month and 1-year full-chemistry benchmarks.
|-valign="top"
|Load balancing in chemistry solver (GCHP)
|Zhouran Sun (WashU)
|Chemistry +<br>Performance
|


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|-bgcolor="#CCCCCC"
|Active chemistry in mesosphere for both GCHP and GCClassic
!width="500px"|Feature
|Helena McDonald (MIT)<br>Sebastian Eastham (ICL)
!width="200px"|Submitted by
|Chemistry
!width="100px"|Type
|
!width="300px"|Status


|-valign="top"
|-valign="top"
|[https://www.geosci-model-dev.net/12/111/2019/gmd-12-111-2019.pdf Aromatic VOC chemistry]
|Updated aromatic oxidation
|Yingying Yan (PKU)<br>Jintai Lin (PKU)
|Stephen MacFarlane (Wollongong)<br>Jenny Fisher (Wollongong)
|Science
|Chemistry
|
|


|}
|-valign="top"
|MCO3 uptake by cloud forming MP; leading to lower PAN
|Laura Yang (Harvard)
|Chemistry
|


== Priorities not yet assigned to a particular version ==
|-valign="top"
|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


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"
|Documentation for adding additional aerosol species
|Connor Barker (UCL)
|Documentation
|


=== Ready to go in ===
|-valign="top"
|Column diagnostics
|Lizzie Lundgren (Harvard)<br>Viral Shah (GMAO)
|Diagnostics
|


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|-bgcolor="#CCCCCC"
|TOMAS rate diagnostics -- improve performance
!width="500px"|Feature
|Betty Croft (WashU/Dal)
!width="200px"|Submitted by
|Diagnostics +<br>Performance
!width="100px"|Type
|
!width="300px"|Status


|-
|-valign="top"
!colspan="4" bgcolor="#CCFFFF"|Chemistry updates
|Archive gamma values from heterogeneous chemistry
|Bob Yantosca (Harvard)
|Diagnostics
|


|-valign="top"
|-valign="top"
|Implement H2 chemistry in UCX
|RRTMG Documentation
|Chris Holmes (FSU)
|GCST
|Science
|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"
|-valign="top"
|Joint CO, CO2, CH4 simulation
|Dry deposition diagnostics by land cover
|Beata Bukosa (Wollongong)
|Holly Nowell (FSU)<br>Chris Holmes (FSU)
|Science
|Dry Deposition
|
|


|-
|-valign="top"
!colspan="4" bgcolor="#CCFFFF"|Emissions and surface fluxes updates
|Dry deposition process diagnostics
|Holly Nowell (FSU)<br>Chris Holmes (FSU)
|Dry Deposition
|


|-valign="top
|-valign="top"
|Updated Streets Hg emissions
|Biomass burning for TOMAS
|Colin Thackray (Harvard)
|Nicole June (CSU)
|Science
|Emissions +<br>Microphysics
|
|


|-valign="top
|-valign="top"
|Updated EDGAR 4.3 Hg emissions
|Historic biomass burning (1750-2010)
|Amanda Giang (UBC)
|Pengfei Liu (Georgia Tech)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|Offline CLM Harmonization
|Rice methane emissions
|Anthony Wong (BU)<br>Jeff Geddes (BU)
|Zichong Cheng (Harvard)
|Science
|Emissions+<br>Carbon simulation
|
|


|-
|-valign="top"
!colspan="4" bgcolor="#CCFFFF"|Aerosol updates
|Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3)
|Tia Scarpelli (Carbon Mapper)<br>Melissa Sulprizio (Harvard)
|Emissions
|


|-valign="top"
|-valign="top"
|Arctic marine SOA
|New prior CO2 biospheric fluxes from CMS-FLUX and GMAO
|Betty Croft (Dalhousie)
|Kevin Bowman (JPL)<br>Lesley Ott (GMAO)
|Science
|Emissions
|
|
*Details on wiki only, not in standard code
*GMAO can provide high-resolution  fluxes (as high as 12 km)


|}
|-valign="top"
|Snowpack Br2 emission
|Chris Holmes (FSU)
|Emissions
|


--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 16:38, 14 May 2019 (UTC)
|-valign="top"
|EDGAR v8.1_toxHg emissions for 1970-2022
|Eric Roy (MIT)
|Emissions
|


=== Almost there (< 6 months) ===
|-valign="top"
|Improve pressure handling in GCHP advection
|Yuanjian Zhang (WashU)<br>Seb Eastham (ICL)
|GCHP
|


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|- bgcolor="#cccccc"
|Add error trap for duplicate scale factors in HEMCO
!width="500px"|Item
|Bob Yantosca (Harvard)
!width="200px"|Author(s)
|HEMCO
!width="100px"|Type
|
!width="300px"|Status


|-valign="top"
|-valign="top"
|Diagnostic to archive XCO2, XCO, and XCH4
|Integration testing: Add stretched grid
|Dylan Jones (Toronto)
|Lizzie Lundgren (Harvard)
|Science
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Provide archived TCR-2 GEOS-Chem OH fields for carbon simulations
|Integration testing: Add GCHP mass flux run
|Kazu Miyazaki (JPL)
|Lizzie Lundgren (Harvard)
|Science
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Evaluate the impact on the tropsophere of using the family approach for transport in the stratosphere
|Integration testing: Reinstate TOMAS40
|Christoph Keller (NASA/GMAO)  
|Betty Croft (Dalhousie/WashU)
|Science
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Examine differences in the lightning NOx schemes in GEOS-Chem and GMI
|Continue cleanup of C-preprocessor switches
|Christoph Keller (NASA/GMAO)<br>Lee Murray (Rochester)
|Lizzie Lundgren (Harvard)
|Science
|Structural
|
|


|-valign="top"
|-valign="top"
|Small alkyl nitrate chemistry
|Updates to Luo deposition scheme
|Jenny Fisher (Wollongong)
|Gan Luo (Albany)
|Science
|Wet Deposition
|
|
*New version, keep as switch (not default)


|-valign="top"
|-valign="top"
|Isoprene chemistry
|Testing the use of a new scavenging parameterization developed by Luo and Yu for cold cloud with Pb-210 aerosol tracer
|Kelvin Bates (Harvard)
|Gan Luo (Albany)<br>Fangqun Yu (Albany)
|Science
|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.
{| border=1 cellspacing=0 cellpadding=5
|- bgcolor="#cccccc"
!width="200px"|Feature
!width="200px"|Contributor(s)
!width="100px"|Model scope
!width="420px"|Notes and References


|-valign="top"
|-valign="top"
|HMS chemistry
|ML algorithms for bulk aerosol
|Jonathan Moch (Harvard)
|Arshad Nair (Albany)<br>Fangqun Yu (Albany)
|Science
|Aerosols
|
|


|-valign="top"
|-valign="top"
|Heterogeneous sulfate production
|Heterogeneous sulfate chemistry
|Lin Zhang (PKU)<br>Becky Alexander (UW)<br>Yuxuan Wang (U. Houston)
|Katie Travis (NASA)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Eliminate 27% scaling on semivolatile fire emissions for complex scheme
|H2 as an active species
|Sidhant Pai (MIT)
|Seb Eastham (ICL)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|BrC aging
|HCN, acetonitrile as fire tracers
|Xuan Wang (Harvard)<br>Melanie Hammer(Dalhousie)
|Kevin Bates (CU Boulder)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|APM update and integration with most recent GC version
|Implement ethane in carbon simulation
|Gan Luo (SUNY-Albany)<br>Fangqun Yu (SUNY-Albany)
|Yuzhong Zhang (Westlake)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Retire carbon-based units for VOCs
|Mesospheric source of CO
|GCST
|Dylan Jones (UofT)<br>Pam Wales (NASA GSFC)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|Ozone deposition to the ocean
|Drought-stress algorithm
|Ryan Pound (York)<br>Mat Evans (York)
|Wei Li (Houston)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|Latitudinally and monthly resolved fixed surface concentrations for GGs back to 1850
|Physically-based resolution correction for BVOC emissions using MEGAN
|Tomás Sherwen (York)<br>Lee Murray (Rochester)
|May Fu (SUSTech)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|Update of US emissions to NEI16
|Canadian forest fire prediction system (Canada government forecast model)
|Barron Henderson (EPA)
|Robin Stevens (Montreal)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|Updated surface ocean dissolved Hg0 from MITgcm
|Cooking emissions (not biofuel)
|Yanxu Zhang (Nanjing)
|Kelvin Bates (CU Boulder)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|HEMCO improvements
|State-specific annual emissions scaling factors (US) (1990-2021)
|Christoph Keller (NASA/GMAO)<br>GCST
|Ishir Dutta (MIT)
|Structural
|Emissions
|
|


|-valign="top"
|-valign="top"
|Cmake in GEOS-Chem
|GISS-GC online
|Liam Bindle (Dalhousie)
|Lee Murray (Rochester)
|Structural
|External model
|
|


|-valign="top"
|-valign="top"
|One-Way Coupling w/ GISS ModelE3
|Hybrid MPI-OpenMP in GCHP
|Lee Murray (Rochester)<br>Eric Leibensperger (SUNY Plattsburgh)
|Seb Eastham (MIT)<br>Killian Murphy (York)<br>Lizzie Lundgren (Harvard)
|Structural
|GCHP
|
|


|-valign="top"
|-valign="top"
|Online Coupling w/ GEOS CCM
|MAPL3: Update to MAPL3 in GCHP, including replacement of ExtData.rc and HISTORY.rc with YAML files
|Lizzie Lundgren (Harvard)<br>Lu Hu (U. MT)<br>Christoph Keller (NASA/GMAO)
|Lizzie Lundgren (Harvard)
|Structural
|GCHP
|
|


|-valign="top"
|-valign="top"
|Shared Socioeconomic Pathways Emission Inventories
|MAPL3: Comply with MAPL "positive" standard in GCHP diagnostic files
|Hong Liao (NUIST)
|Lizzie Lundgren (Harvard)
|Science
|GCHP
|
|


|}
|-valign="top"
|MAPL3: Wildcards in GCHP History
|Lizzie Lundgren (Harvard)
|GCHP
|


--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 16:38, 14 May 2019 (UTC)
|-valign="top"
|MAPL3: Output emissions with positive up convention in GCHP
|Lizzie Lundgren (Harvard)
|GCHP
|


=== Over the horizon (6-12 months) ===
|-valign="top"
|Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone
|Bob Yantosca (Harvard)
|Performance
|


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|- bgcolor="#cccccc"
|Photophysical oxidation of aldehydes
!width="500px"|Item
|Paulo Sebastianelli (Wollongong)<br>Jenny Fisher (Wollongong)
!width="200px"|Author(s)
|Chemistry
!width="100px"|Type
|
!width="300px"|Status


|-valign="top"
|-valign="top"
|Update OCS simulation in the standard code
|DMS updates
|Kevin Bowman (JPL)
|Will Porter (UCR)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Examine what are the differences in the PSC implementation in GEOS-Chem and GMI and assess the implications of these differences for startospheric ozone
|Furans emission and chemistry
|Susan Strahan (Goddard)<br>Sebastian Eastham (MIT)
|Lixu Jin (Montana)<br>Lu Hu (Montana)
|Science
|Chemistry + <br>Emissions
|
|


|-valign="top"
|-valign="top"
|Rainout and washout update
|Cl2 prodcution from Fe aerosol
|Gan Luo(SUNY-Albany)<br>Fangqun Yu (SUNY-Albany)
|Qianjie Chen (HK Poly)<br>Becky Alexander (UW)
|Science
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Rediagnosis of RAS convection in GEOS-Chem
|VCP emissions
|Tailong He (Toronto)<br>Dylan Jones (Toronto)<br>Andrea Molod (NASA/GMAO)
|Kevin Bates (CU Boulder)
|Science
|Emissions
|
|


|-valign="top"
|-valign="top"
|New schedule for tracer transport benchmarks (FP change, scavenging change, or major release)
|Bidirectional land-atmosphere exchange for Hg
|Andrea Molod (NASA/GMAO)
|Yuying Cui (MIT/Tsinghua)
|Science
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Methanol as part of standard chemical mechanism
|OH covariances for inversions
|Dylan Millet (U Minnesota)<br>Katie Travis (NASA)
|Elise Penn (Harvard)
|Science
|Inversions
|
|


|-valign="top"
|-valign="top"
|Updated cloud water pH
|CESM2-GC offline
|Viral Shah (Harvard)<br>Jonathan Moch (Harvard)
|Seb Eastham (ICL)<br>Lee Murray (Rochester)
|Science
|Met fields
|
|


|-valign="top"
|-valign="top"
|Halogen chemistry update
|Re-binning of off-line sea salt and dust for TOMAS
|Tomas Sherwen (York)<br>Xuan Wang (Harvard)<br>Shuting Zhai (UW)
|Betty Croft (Dalhousie)
|Science
|Microphysics
|
|


|-valign="top"
|-valign="top"
|Methylethylketone chemistry
|TOMAS nucleation updates
|Jared Brewer (CSU)
|Sam O'Donnell (CSU)
|Science
|Microphysics
|
|


|-valign="top"
|-valign="top"
|Add sulfate dependence to SOA yield from isoprene in simple SOA
|Stratospheric aerosol APM
|Elo&iuml;se Marais (Leicester)
|Fangqun Yu (SUNY Albany)
|Science
|Microphysics
|
|


|-valign="top"
|-valign="top"
|Trace metal simulation
|Transition from MERRA-2 to GEOS-IT for benchmarking
|Junwei Xu (Dalhousie)
|Yuanjian Zhang (WashU)
|Science
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Hg gas-phase photo-reduction
|Automate integration testing on AWS
|Colin Thackray (Harvard)
|Yidan Tang (WashU)
|Science
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Move GEOS-Chem Classic run directory creation from Unit Tester to source code
|Integration testing: Add across end of year run
|GCST
|GCST
|Structural
|Quality Assurance
|
 
|-valign="top"
|Integration testing: Add GEOS-IT
|Yuanjian Zhang (WashU)
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Dynamic diagnostic array size allocation based on settings in HISTORY.rc
|Separate mixing, emissions, and drydep
|GCST
|Yuanjian Zhang (WashU)
|Structural
|Structural
|
|


|-valign="top"
|-valign="top"
|Removal of binary punch diagnostics
|Intel IFX compiler
|GCST
|Bob Yantosca (Harvard)
|Structural
|Structural
|
|


|-valign="top"
|-valign="top"
|GCPy 1-year benchmark and continued development
|CMake option to only build libraries but not executable, also passing C-preprocessor statements to turn off code
|GCST
|Bob Yantosca (Harvard)<br>Lee Murray (Rochester)
|Structural
|Structural
|
|


|-valign="top"
|-valign="top"
|Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange
|Remove differences introduced when breaking up GC-Classic runs in time; and flexible precision in HEMCO
|Amos Tai (CUHK)
|Lizzie Lundgren (Harvard)
|Science
|Structural
|
|


|-valign="top"
|-valign="top"
|Canopy Physics Model
|Limit allocation of State_Met to what is needed per simulation
|Sam Silva (MIT)
|Melissa Sulprizio (Harvard)
|Structural
|Structural
|
|


|-valign="top"
|-valign="top"
|Landcover/Fire Emissions Offline LPJlmfire
|Using 3-D precipitation fluxes to calculate precipitation formation and re-evaporation in scavenging (to be consistent with GEOS/GOCART & ground precipitation)
|Loretta Mickley (Harvard)
|Gan Luo (Albany)<br>Hongyu Liu (NIA/LaRC)<br>Bo Zhang (NIA/LaRC)
|Science
|Wet deposition
|
|


|}
|}


--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 16:38, 14 May 2019 (UTC)
== 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"|Status
!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"
|-valign="top"
|Implement isotope simulation for CO and CH4 in GCHP
|Lightning NOx production rates
|Lee Murray (Rochester)
|Bex Horner (UCL)
|Science
|Emissions
|
 
|-valign="top"
|HFO and CF3CHO
|Beth Killen (Wollongong)<br>Jenny Fisher (Wollongong)
|Chemistry
|
 
|-valign="top"
|Glyoxal updates from isoprene
|Tzung-May Fu (SUSTech)
|Chemistry
|
 
|-valign="top"
|Iodine chemistry
|Becky Alexander (UW)<br>Xuan Wang (CUHK)
|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"
|-valign="top"
|Migrate LETFK DA scheme to GCHP
|Air-sea exchange parameterization
|Kazu Miyazaki (JPL)
|Eric Roy (MIT)
|Science
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Super fast chemistry scheme
|Soil Hg emissions parameterization
|Benjamin Brown-Steiner (AER)<br>Makoto Kelp (Harvard)
|Ari Feinberg (IQF-CSIC)
|Science
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Add non-volatile cations to ISORROPIA
|Sea salt uptake of GOM
|Becky Alexander (UW)
|Eric Roy (MIT)
|Science
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Update Europe emissions to EMEP 2016
|Photoreduction rate constant
|Eloise Marais (Leicester)
|Eric Roy (MIT)
|Science
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|MEGAN3
|New observations (2010-2020) in standardized Hg benchmark for intercomparison
|Sam Silva (MIT)<br>Jen Kaiser (GIT)<br>Yuxuan Wang (UH)
|Eric Roy (MIT)/Ari Feinberg (IQF-CSIC)
|Science
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|DMS oxidation scheme updating
|Hg simulation in GCHP
|Becky Alexander (UW)<br>Qianjie Chen (UW)
|Eric Roy (MIT)
|Science
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Streamlining of specialty simulations through HEMCO and KPP
|OCIM - biogeochemical model - (C/P/N/Fe - no Hg yet) (MATLAB)
|GCST<br>Chris Holmes (FSU)<br>Colin Thackray for POPs (Harvard)<br>Peter Ivatt (York) for PAH
|Hannah Horowitz (UIUC)
|Science
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Hg in WRF-GC
|Possibly updating Hg oxidation chemistry based on Utah field campaigns
|Yanxu Zhang (Nanjing)
|Jessica Haskins (Utah)
|Science
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Hg with blowing snow
|New halogen/aerosol fields (surface area / AOD) from 10-year 14.4 benchmark simulation available online
|Yanxu Xhang (Nanjing)
|Viral Shah (NASA GMAO); Eric Roy (MIT); Ari Feinberg (IQF-CSIC)
|Science
|Input data
|
|


|-valign="top"
|-valign="top"
|Updated treatment of Hg in ocean
|Extend IMI to CO2 (ICI)
|Chris Holmes (FSU)
|Hannah Nesser (JPL)  
|Science
|Inversions
|
|


|-valign="top"
|-valign="top"
|GTMM updates
|Global emission inventory of metals
|Ben Geyman (Harvard)
|Tzung-May Fu (SUSTech); He Zhong Tian (Peking Normal U)
|Science
|Metals simulation
|
|


|-valign="top"
|-valign="top"
|Complex / multicomplex variables
|Investigate and improve performance of aerosol chemistry
|Shannon Capps (Drexel)
|Bob Yantosca (Harvard)
|Structural
|Performance
|
|


|-valign="top"
|-valign="top"
|Build KPP when you compile GC
|PAH - update from version 11
|GCST
|Lexia Cicone (MIT)
|Structural
|POPs simulation
|
|


|-valign="top"
|-valign="top"
|Restructure source code folders
|Species database more accessible; doc updates; TOL discussion
|GCST
|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
|


--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 16:38, 14 May 2019 (UTC)
|-valign="top"
|Comparing mass fluxes in GCHP vs. traditional lat/lon wind
|Yuanjian Zhang (WashU), Seb Eastham (ICL)
|Transport
|


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

Latest revision as of 16:19, 31 October 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 version of CEDS at 0.1 deg Dandan Zhang (WashU) Emissions Simple
Use USTAR read from GEOS instead of calculating from U10M and V10M Yuanjian Zhang (WashU) Emissions Simple
  • HEMCO PR #279
  • NOTE: WashU will recompute mass tuning factors for each met field & resolution (GCClassic)
Ongoing carbon simulation fixes in GCClassic and GCHP GCST Carbon simulation Medium
Investigate potential performance gains of replacing the KPP Rosenbrock solver with the LSODE solver Bob Yantosca (Harvard) Chemistry Medium
Fix obspack - not working in 14.4.0 Bob Yantosca (Harvard) Diagnostics Medium
Make GC-Classic bit-for-bit reproducible upon restart
(part 1 of 2) 		Lizzie Lundgren (Harvard) GC-Classic Medium
Capture all trop and PBL height changes in budget diagnostics Chris Holmes (FSU)
Lizzie Lundgren (Harvard) 		Diagnostics Medium
Derive convective precipitation flux if using FP/IT generated with Grell-Freitas Yuanjian Zhang (WashU)
Viral Shah (GMAO)
Lizzie Lundgren (Harvard) 		Convection 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
Correct the issue that injection height has been artificially decreased by HEMCO Lixu Jun (Montana) Emissions Simple Delivered
June 2024
Capability to run GCClassic at 0.125x0.15625 resolution Melissa Sulprizio (Harvard)
Xiaolin Wang (Harvard) 		Nested grid Simple Delivered
Strat-adjusted RF in GCC and GCHP Connor Barker (UCL)
Eloise Marais (UCL) 		Radiation Simple Delivered
Archived TCR-2 OH fields for carbon simulations Kazu Miyazaki (JPL)
Melissa Sulprizio (Harvard) 		Input data Simple Data delivered
Oct 2024
  • This will be the default OH, but users will have the option of selecting other OH fields
  • geos-chem issue #2537
Dust non-sphericity impacts on optical properties Inderjeet Singh (WashU) Aerosols Medium Not yet delivered

Ready to go in

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

Feature Contributor(s) Model scope Delivery status Notes and Refereneces


Binary Activity Thermodynamic (BAT) model for non-ideal mixing of water and organics in organic aerosol Camilo Serrano (McGill)
Andreas Zuend (McGill) 		Aerosols Not delivered
Update UCX to include gravitational settling of aerosol species beyond just BCPI Conor Barker (UCL)
Eloise Marais (UCL) 		Aerosols Not delivered
Seasalt aerosol from sea ice leads (2002-2011) Hannah Horrowitz (UIUC) Aerosols Not delivered
  • Offline and online, ready to go in HEMCO (optional in addition to existing seasalt emissions)
Global organic N dep from various emissions; nitrate aromatics updates May Fu (SUSTech) Chemistry +
Deposition 		Not delivered
Dry deposition to F90 to improve readability Chris Holmes (FSU) Dry Deposition Not delivered
Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange Joey Lam (CUHK)
Amos Tai (CUHK) 		Dry deposition Delivered
Feb 2021
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

Almost there (< 6 months)

Features listed in this table are in development and will likely be delivered to the GEOS-Chem Support Team within the next 6 months.

Feature Contributor(s) Model scope Notes and References
Fixes to stratospheric aerosol settling Connor Barker (UCL)
Eloise Marais (UCL) 		Aerosols
DMS chemistry in v14 Linia Tashmim (UCR)
Will Porter (UCR) 		Chemistry
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: Reinstate TOMAS40 Betty Croft (Dalhousie/WashU) Quality Assurance
Continue cleanup of C-preprocessor switches Lizzie Lundgren (Harvard) Structural
Updates to Luo deposition scheme Gan Luo (Albany) Wet Deposition
  • New version, keep as switch (not default)
Testing the use of a new scavenging parameterization developed by Luo and Yu for cold cloud with Pb-210 aerosol tracer Gan Luo (Albany)
Fangqun Yu (Albany) 		Wet Deposition

Over the horizon (6-12 months)

Features listed in this table are in development and will likely be delivered to the GEOS-Chem Support Team in the 6-12 months timeframe.

Feature Contributor(s) Model scope Notes and References
ML algorithms for bulk aerosol Arshad Nair (Albany)
Fangqun Yu (Albany) 		Aerosols
Heterogeneous sulfate chemistry Katie Travis (NASA) Chemistry
H2 as an active species Seb Eastham (ICL) Chemistry
HCN, acetonitrile as fire tracers Kevin Bates (CU Boulder) Chemistry
Implement ethane in carbon simulation Yuzhong Zhang (Westlake) Chemistry
Mesospheric source of CO Dylan Jones (UofT)
Pam Wales (NASA GSFC) 		Emissions
Drought-stress algorithm Wei Li (Houston) Emissions
Physically-based resolution correction for BVOC emissions using MEGAN May Fu (SUSTech) Emissions
Canadian forest fire prediction system (Canada government forecast model) Robin Stevens (Montreal) Emissions
Cooking emissions (not biofuel) Kelvin Bates (CU Boulder) Emissions
State-specific annual emissions scaling factors (US) (1990-2021) Ishir Dutta (MIT) Emissions
GISS-GC online Lee Murray (Rochester) External model
Hybrid MPI-OpenMP in GCHP Seb Eastham (MIT)
Killian Murphy (York)
Lizzie Lundgren (Harvard) 		GCHP
MAPL3: Update to MAPL3 in GCHP, including replacement of ExtData.rc and HISTORY.rc with YAML files Lizzie Lundgren (Harvard) GCHP
MAPL3: Comply with MAPL "positive" standard in GCHP diagnostic files Lizzie Lundgren (Harvard) GCHP
MAPL3: Wildcards in GCHP History Lizzie Lundgren (Harvard) GCHP
MAPL3: Output emissions with positive up convention in GCHP Lizzie Lundgren (Harvard) GCHP
Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone Bob Yantosca (Harvard) Performance
Photophysical oxidation of aldehydes Paulo Sebastianelli (Wollongong)
Jenny Fisher (Wollongong) 		Chemistry
DMS updates Will Porter (UCR) Chemistry
Furans emission and chemistry Lixu Jin (Montana)
Lu Hu (Montana) 		Chemistry +
Emissions
Cl2 prodcution from Fe aerosol Qianjie Chen (HK Poly)
Becky Alexander (UW) 		Chemistry
VCP emissions Kevin Bates (CU Boulder) Emissions
Bidirectional land-atmosphere exchange for Hg Yuying Cui (MIT/Tsinghua) Hg simulation
OH covariances for inversions Elise Penn (Harvard) Inversions
CESM2-GC offline Seb Eastham (ICL)
Lee Murray (Rochester) 		Met fields
Re-binning of off-line sea salt and dust for TOMAS Betty Croft (Dalhousie) Microphysics
TOMAS nucleation updates Sam O'Donnell (CSU) Microphysics
Stratospheric aerosol APM Fangqun Yu (SUNY Albany) Microphysics
Transition from MERRA-2 to GEOS-IT for benchmarking Yuanjian Zhang (WashU) Quality Assurance
Automate integration testing on AWS Yidan Tang (WashU) Quality Assurance
Integration testing: Add across end of year run GCST Quality Assurance
Integration testing: Add GEOS-IT Yuanjian Zhang (WashU) Quality Assurance
Separate mixing, emissions, and drydep Yuanjian Zhang (WashU) Structural
Intel IFX compiler Bob Yantosca (Harvard) Structural
CMake option to only build libraries but not executable, also passing C-preprocessor statements to turn off code Bob Yantosca (Harvard)
Lee Murray (Rochester) 		Structural
Remove differences introduced when breaking up GC-Classic runs in time; and flexible precision in HEMCO Lizzie Lundgren (Harvard) Structural
Limit allocation of State_Met to what is needed per simulation Melissa Sulprizio (Harvard) Structural
Using 3-D precipitation fluxes to calculate precipitation formation and re-evaporation in scavenging (to be consistent with GEOS/GOCART & ground precipitation) Gan Luo (Albany)
Hongyu Liu (NIA/LaRC)
Bo Zhang (NIA/LaRC) 		Wet deposition

Longer term (12-24 months)

Features listed in this table are in development and will likely be delivered to the GEOS-Chem Support Team in the 12-24 months timeframe.

Feature Contributor(s) Model scope Notes and References
Modal aerosol model (MAM7) in GCHP Shreya Sharma (MIT) Aerosols
Online OCIM ocean biogeochemistry Lee Murray (Rochester)
Hannah Horowitz (UIUC)
Chris Holmes (FSU) 		Chemistry
Perchlorate chemistry Yuk Chun Chan (UW) Chemistry
Non-stomatal dry deposition (2-layer canopy model) Michael Vermeuel (Purdue) Dry Deposition
Continental chloride particle emissions (salty dust, road salt) Jessica Haskins (Utah) Emissions
Multivolatility emission inventory to address gaps in EDGAR/HTAP etc. Ruochong (Tshingua) Emissions
Lightning NOx production rates Bex Horner (UCL) Emissions
HFO and CF3CHO Beth Killen (Wollongong)
Jenny Fisher (Wollongong) 		Chemistry
Glyoxal updates from isoprene Tzung-May Fu (SUSTech) Chemistry
Iodine chemistry Becky Alexander (UW)
Xuan Wang (CUHK) 		Chemistry
GFED5 biomass burning Eric Roy (MIT) Emissions
Ocean Hg surface concentrations for 2010-2020 from multi-model ensemble Eric Roy (MIT)
Ari Feinberg (IQF-CSIC) 		Hg simulation
Soil Hg emissions 2010-2020 Eric Roy (MIT)
Ari Feinberg (IQF-CSIC) 		Hg simulation
Air-sea exchange parameterization Eric Roy (MIT) Hg simulation
Soil Hg emissions parameterization Ari Feinberg (IQF-CSIC) Hg simulation
Sea salt uptake of GOM Eric Roy (MIT) Hg simulation
Photoreduction rate constant Eric Roy (MIT) Hg simulation
New observations (2010-2020) in standardized Hg benchmark for intercomparison Eric Roy (MIT)/Ari Feinberg (IQF-CSIC) Hg simulation
Hg simulation in GCHP Eric Roy (MIT) Hg simulation
OCIM - biogeochemical model - (C/P/N/Fe - no Hg yet) (MATLAB) Hannah Horowitz (UIUC) Hg simulation
Possibly updating Hg oxidation chemistry based on Utah field campaigns Jessica Haskins (Utah) Hg simulation
New halogen/aerosol fields (surface area / AOD) from 10-year 14.4 benchmark simulation available online Viral Shah (NASA GMAO); Eric Roy (MIT); Ari Feinberg (IQF-CSIC) Input data
Extend IMI to CO2 (ICI) Hannah Nesser (JPL) Inversions
Global emission inventory of metals Tzung-May Fu (SUSTech); He Zhong Tian (Peking Normal U) Metals simulation
Investigate and improve performance of aerosol chemistry Bob Yantosca (Harvard) Performance
PAH - update from version 11 Lexia Cicone (MIT) POPs simulation
Species database more accessible; doc updates; TOL discussion Jessica Haskins (Utah) Structural
Stretched-grid plotting in GCPy Killian Murphy (York) Tools
Model inter-comparison of transport (GEOS, GCHP, GCClassic) Lizzie Lundgren (Harvard), Emma Knowland (NASA) Transport
Comparing mass fluxes in GCHP vs. traditional lat/lon wind Yuanjian Zhang (WashU), Seb Eastham (ICL) Transport
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