GEOS-Chem model development priorities: Difference between revisions

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On this page we list the current priorities for GEOS-Chem development. This list was compiled by the user Working Groups at the last [http://acmg.seas.harvard.edu/geos/meetings/2015/index.html International GEOS-Chem Meeting (IGC7)] in May 2015 and has been continuously updated since based on code readiness and input from the Working Groups and the Steering Committee.
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''']].


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.
== Merged and awaiting release ==


== List of priorities as of Oct 2016 ==
See the links below for items merged and awaiting release.


Items "Awaiting release" will be part of the next version release of GEOS-Chem and are actively being incorporated into the standard model and benchmarked. Other items are in different stages of readiness and will be included in future versions of the model.
{| border=1 cellspacing=0 cellpadding=5
|-bgcolor="#CCCCCC"
!width="300px"|Mergeable at any time
!width="200px"|Version in development


=== Awaiting release ===
|-valign="top"
|align="center"|'''[[GEOS-Chem no-diff-to-benchmark]]'''
|align="center"|'''[[GEOS-Chem 14.5.0]]'''
 
|}
 
== 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
|-bgcolor="#CCCCCC"
!width="200px"|Feature
!width="200px"|Contributor(s)
!width="100px"|Model scope
!width="100px"|Ease of implementation
!width="300px"|Notes and References


{| border=1 cellspacing=0 cellpadding=5
|-valign="top"
|- bgcolor="#cccccc"
|New version of CEDS at 0.1 deg
!width="400px"|Item
|Dandan Zhang (WashU)
!width="300px"|Author(s)
|Emissions
!width="400px"|Status
|Simple
|
*[https://github.com/geoschem/geos-chem/pull/2171 geos-chem PR #2171]
 
|-valign="top"
|Use USTAR read from GEOS instead of calculating from U10M and V10M
|Yuanjian Zhang (WashU)
|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"
|Ongoing carbon simulation fixes in GCClassic and GCHP
|GCST
|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]


|- bgcolor="#ccffff"
|-valign="top"
!width="400px"|Science updates
|Investigate potential performance gains of replacing the KPP Rosenbrock solver with the LSODE solver
!width="300px"|
|Bob Yantosca (Harvard)
!width="400px"|
|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"
|-valign="top"
|[[Air_Quantity_Updates_for_v11-01|Correction for wet/dry pressure]]
|Fix obspack - not working in 14.4.0
|Lizzie Lundgren (Harvard)<br>Meemong Lee (JPL)
|Bob Yantosca (Harvard)
|Diagnostics
|Medium
|
|
*Included in [[GEOS-Chem v11-01#v11-01a|v11-01a]] (approved 07 Jul 2015)
*[https://github.com/geoschem/geos-chem/issues/2328 geos-chem issue #2328]
*A [[GEOS-Chem_v11-01#Incorrect_incorporation_of_moisture_in_GEOS-Chem_air_quantities|fix to remove the moisture signature]] was included in [[GEOS-Chem v11-01#v11-01h|v11-01h]] (approved 11 Oct 2015)


|-valign="top"
|-valign="top"
|[[Sulfate_aerosols#Update_DMS_climatology_to_Lana|Update DMS climatology to Lana]]
|Make GC-Classic bit-for-bit reproducible upon restart<br>(part 1 of 2)
|Tom Breider (Harvard)
|Lizzie Lundgren (Harvard)
|GC-Classic
|Medium
|
|
*Included in [[GEOS-Chem v11-01#v11-01b|v11-01b]] (approved 19 Aug 2015)
*[https://github.com/geoschem/geos-chem/pull/2521 geos-chem PR #2521]


|-valign="top"
|-valign="top"
|[[Wet_deposition#Impaction_scavenging_for_hydrophobic_BC_and_homogeneous_IN_removal|Impaction scavenging for hydrophobic BC]]
|Capture all trop and PBL height changes in budget diagnostics
|Qiaoqiao Wang (Max Planck Institute)
|Chris Holmes (FSU)<br>Lizzie Lundgren (Harvard)
|Diagnostics
|Medium
|
|
*Included in [[GEOS-Chem v11-01#v11-01b|v11-01b]] (approved 19 Aug 2015)
*[https://github.com/geoschem/geos-chem/pull/2103 geos-chem PR 2103]


|-valign="top"
|-valign="top"
|[[Wet_deposition#Impaction_scavenging_for_hydrophobic_BC_and_homogeneous_IN_removal|Homogeneous IN removal]]
|Derive convective precipitation flux if using FP/IT generated with Grell-Freitas
|Qiaoqiao Wang (Max Planck Institute)
|Yuanjian Zhang (WashU)<br>Viral Shah (GMAO)<br>Lizzie Lundgren (Harvard)
|Convection
|Medium
|
|
*Included in [[GEOS-Chem v11-01#v11-01b|v11-01b]] (approved 19 Aug 2015)
*[https://github.com/geoschem/geos-chem/issues/2469 geos-chem Issue #2469]
*[https://github.com/geoschem/geos-chem/pull/2523 geos-chem PR #2523]
 
|}
 
== Prioritized and in the queue ==
 
Features listed in this table are prioritized for integration into GEOS-Chem in the near future.
 
{| border=1 cellspacing=0 cellpadding=5
|-bgcolor="#CCCCCC"
!width="200px"|Feature
!width="200px"|Contributor(s)
!width="100px"|Model scope
!width="100px"|Ease of implementation
!width="100px"|Delivery status
!width="300px"|Notes and References


|-valign="top"
|-valign="top"
|[[Aerosol emissions#Online emission of marine primary organic aerosol .28POA.29|Online emission of marine primary organic aerosol (POA)]]
|Retire CH4, CO2, tagCO simulations in favor of carbon simulation
|Brett Gantt (NCSU)<br>Matthew Johnson (NASA Ames)
|Melissa Sulprizio (Harvard)
|Carbon gases
|Simple
|
|
|
*Included in [[GEOS-Chem v11-01#v11-01b|v11-01b]] (approved 19 Aug 2015)
*[https://github.com/geoschem/geos-chem/issues/2387 geos-chem issue #2387]


|-valign="top"
|-valign="top"
|[[Aerosols_Working_Group#Organic_Aerosol_Density_.28v.10-01.29|Density of OA update]]
|Correct the issue that injection height has been artificially decreased by HEMCO
|Melanie Hammer (Dalhousie)<br>Elo&iuml;se Marais (Harvard)
|Lixu Jun (Montana)
|Emissions
|Simple
|Delivered<br>June 2024
|
|
*Included in [[GEOS-Chem v11-01#v11-01b|v11-01b]] (approved 19 Aug 2015)
*[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"
|-valign="top"
|[[Aerosol_optical_properties#Implementation_of_optical_properties_for_brown_carbon|Addition of BrC UV absorption to address impacts on OH]]
|Capability to run GCClassic at 0.125x0.15625 resolution
|Melanie Hammer (Dalhousie)
|Melissa Sulprizio (Harvard)<br>Xiaolin Wang (Harvard)
|Nested grid
|Simple
|Delivered
|
|
*Included in [[GEOS-Chem v11-01#v11-01b|v11-01b]] (approved 19 Aug 2015)
*[https://github.com/geoschem/geos-chem/pull/1980 geos-chem PR #1980]
*[https://github.com/geoschem/HEMCO/pull/290 HEMCO PR #290]


|-valign="top"
|-valign="top"
|[[Mineral_dust_aerosols#Surface_chemistry_on_dust|Acid uptake on dust aerosols]]
|Strat-adjusted RF in GCC and GCHP
|T. Duncan Fairlie (NASA/LARC)
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|Radiation
|Simple
|Delivered
|
|
*Included in [[GEOS-Chem v11-01#v11-01b|v11-01b]] (approved 19 Aug 2015)
*[https://github.com/geoschem/geos-chem/pull/2525 geos-chem PR #2525]


|-valign="top"
|-valign="top"
|[[Mineral_dust_aerosols#Improved_dust_size_distribution_scheme|Improved dust size distribution scheme]]
|Archived TCR-2 OH fields for carbon simulations
|Li Zhang (Colorado U.)<br>Daven Henze (Colorado U.)
|Kazu Miyazaki (JPL)<br>Melissa Sulprizio (Harvard)
|Input data
|Simple
|Data delivered<br>Oct 2024
|
|
*Included in [[GEOS-Chem v11-01#v11-01b|v11-01b]] (approved 19 Aug 2015)
*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"
|[[POPs_simulation#Updates_to_PAH_code|Updates to PAH code]]
|Dust non-sphericity impacts on optical properties
|Carey Friedman (MIT)
|Inderjeet Singh (WashU)
|Aerosols
|Medium
|Not yet delivered
|
|
*Included in [[GEOS-Chem v11-01#v11-01c|v11-01c]] (approved 14 Sep 2015)
 
|}
 
== 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"
|[[Mercury#Hg ocean MLD bug fixes|Hg Ocean MLD bug fixes]]
|Binary Activity Thermodynamic (BAT) model for non-ideal mixing of water and organics in organic aerosol
|Amanda Giang (MIT)
|Camilo Serrano (McGill)<br>Andreas Zuend (McGill)
|Aerosols
|Not delivered
|
|
*Included in [[GEOS-Chem v11-01#v11-01c|v11-01c]] (approved 14 Sep 2015)
*[https://github.com/geoschem/geos-chem/issues/2392 geos-chem issue #2392]


|-valign="top"
|Update UCX to include gravitational settling of aerosol species beyond just BCPI
|Conor Barker (UCL)<br>Eloise Marais (UCL)
|Aerosols
|Not delivered
|


|-valign="top"
|-valign="top"
|[[Mercury#Hg ocean rate coefficients|Hg Ocean rate coefficients]] (as an option, not default)
|Seasalt aerosol from sea ice leads (2002-2011)
|Shaojie Song (MIT)
|Hannah Horrowitz (UIUC)
|Aerosols
|Not delivered
|
|
*Included in [[GEOS-Chem v11-01#v11-01c|v11-01c]] (approved 14 Sep 2015)
*Offline and online, ready to go in HEMCO (optional in addition to existing seasalt emissions)


|-valign="top"
|Global organic N dep from various emissions; nitrate aromatics updates
|May Fu (SUSTech)
|Chemistry +<br>Deposition
|Not delivered
|


|-valign="top"  
|-valign="top"
|[[Mercury#Updates_to_Arctic_Hg_processes|Hg Arctic process updates]]
|Dry deposition to F90 to improve readability
|Jenny Fisher (Wollongong)
|Chris Holmes (FSU)
|Dry Deposition
|Not delivered
|
|
*Included in [[GEOS-Chem v11-01#v11-01c|v11-01c]] (approved 14 Sep 2015)
*[https://github.com/geoschem/geos-chem/issues/2389 geos-chem issue #2389]


|-valign="top"
|Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange
|Joey Lam  (CUHK)<br>Amos Tai (CUHK)
|Dry deposition
|Delivered<br>Feb 2021
|
*[https://github.com/geoschem/geos-chem/pull/629 geos-chem PR #629]


|-valign="top"
|-valign="top"
|[[Mercury#Hg emission updates|Hg emission updates (NEI2011, NPRI2011, UNEP2010 with adjustments for in-plume reduction and emission controls)]]
|FRP-based fire emissions for eastern US at 0.2 (2019-2020)
|Yanxu Zhang (Harvard)<br>Amanda Giang (MIT)
|Chris Holmes (FSU)
|Emissions
|Not delivered
|
|
*Included in [[GEOS-Chem v11-01#v11-01c|v11-01c]] (approved 14 Sep 2015)
*[https://github.com/geoschem/geos-chem/issues/2388 geos-chem issue #2388]


|-valign="top"
|-valign="top"
|[[MEGAN_v2.1_plus_Guenther_2012_biogenic_emissions#CO2_direct_effect_on_isoprene_emissions|CO2 direct effect on isoprene emissions]]
|China agriculture NH3 emissions
|Amos Tai (CUHK)
|Amos Tai (CUHK)
|Emissions
|Not delivered
|
|
*Included in [[GEOS-Chem v11-01#v11-01d|v11-01d]] (approved 12 Dec 2015)


|-valign="top"
|-valign="top"
|[[Organics Working Group#Criegee intermediates|Criegee intermediates]]
|T-dependent anthropogenic VOCs
|Dylan Millet (U. Minnesota)<br>Elo&iuml;se Marais (Harvard)
|May Fu (SUSTech)
|Emissions
|Not delivered
|
|
*Included in [[GEOS-Chem v11-01#v11-01d|v11-01d]] (approved 12 Dec 2015)
*Option. Requires processing existing anthropogenic VOC emissions to generate offline emissions to read in. Parameterised for China.


|-valign="top"
|-valign="top"
|[[GEOS-Chem species database|Developing a common data structure to contain Henry's law constants and other relevant parameters for each species]]
|New source functions for transport tracers beryllium-7 and beryllium-10
|Minjie Zheng (ETH)
|Emissions
|Delivered<br>June 2024
|
|
[[GEOS-Chem Support Team]]<br>Katie Travis (Harvard)
*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
|
|
*Introduced in [[GEOS-Chem v11-01#v11-01d|v11-01d]] (approved 12 Dec 2015)
*Data involves many files- need to think about temporal frequency
*Modified in [[GEOS-Chem v11-01#v11-01e|v11-01e]] (approved 04 Jan 2016)


|-valign="top"
|-valign="top"
|[[FlexChem]]
|Australian Hg emissions (2000-2019)
|Mike Long (Harvard), [[GCST]]
|Stephen MacFarlane (Wollongong)<br>Jenny Fisher (Wollongong)
|Emissions
|Not delivered
|
|
*Included in [[GEOS-Chem v11-01#v11-01g|v11-01g]] (approved 28 Sep 2016)
*[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


|-bgcolor="#ccffff" valign="top"
|-valign="top"
!width="400px"|Structural/programming updates
|Hg geogenic emissions (volcanic, rock weathering)
!width="300px"|  
|Eric Roy (MIT)
!width="400px"|
|Emissions
|Not delivered
|
*[https://github.com/geoschem/geos-chem/issues/2361 geos-chem #2361]
*[https://gmd.copernicus.org/preprints/gmd-2024-65/ Dastoor et al. (2024)]


|-valign="top"
|-valign="top"
|[[GEOS-Chem timers]]
|Hg biomass burning - FINN2.5 & GFED4
|Matt Yannetti (GCST)
|Eric Roy (MIT)
|Emissions
|Not delivered
|
|
*Included in [[GEOS-Chem v11-01#v11-01c|v11-01c]] (approved 14 Sep 2015)
*[https://github.com/geoschem/geos-chem/issues/2361 geos-chem #2361]
*[https://gmd.copernicus.org/preprints/gmd-2024-65/ Dastoor et al. (2024)]


|-valign="top"
|-valign="top"
|[[MERRA-2|Adding support for MERRA-2 meteorology]]
|BCC-GC online
|[[GEOS-Chem Support Team]]
|Lin Zhang (PKU)
|External Model
|Not delivered
|
|
*Initial modifications for running with MERRA-2 were included in [[GEOS-Chem v11-01#v11-01c|v11-01c]] (approved 14 Sept 2015)
*Full integration of MERRA-2 in GEOS-Chem (i.e. making "full-chemistry" simulations compatible with MERRA-2) was implemented in [[GEOS-Chem v11-01#v11-01f|v11-01f]] (approved 16 Apr 2016)


|-valign="top"
|-valign="top"
|Structural updates for GEOS-Chem HP
|GC-YIBS with online fire emissions
|[[GEOS-Chem Support Team]]<br>NASA/GMAO
|Xu Yue (NUIST)<br>Hong Liao (NUIST)
|External Model
|Not delivered
|
 
|-valign="top"
|GISS-GC offline (GCAP)
|Lee Murray (Rochester)
|GCAP
|Not delivered
|
|
*This will be an ongoing process that will occur simultaneously as the above science updates are brought into GEOS-Chem.


|}
|}


--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 17:56, 18 October 2016 (UTC)
== Almost there (< 6 months) ==


=== Ready to go in ===
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
{|border=1 cellspacing=0 cellpadding=5
|- bgcolor="#cccccc"
|- bgcolor="#cccccc"
!width="400px"|Item
!width="200px"|Feature
!width="300px"|Author(s)
!width="200px"|Contributor(s)
!width="400px"|Status
!width="100px"|Model scope
!width="420px"|Notes and References


|-valign="top"
|-valign="top"
|[[New_isoprene_scheme#Set_ACTA_and_HCOOH_to_active_in_globchem.dat|Set ACTA and HCOOH to active]]
|Fixes to stratospheric aerosol settling
|Katie Travis (Harvard)
|Connor Barker (UCL)<br>Eloise Marais (UCL)
|Aerosols
|
|
*Delivered to GCST


|-valign="top"
|-valign="top"
|Halogen chemistry updates
|DMS chemistry in v14
|Tom&aacute;s Sherwen (York)<br>Johan Schmidt (Harvard)<br>[[Chemistry Issues|Oxidants and Chemistry WG]]
|Linia Tashmim (UCR)<br>Will Porter (UCR)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|[[Updates_in_JPL_Publication_15-10|Updating chemistry rate constants based on ''JPL Publication 15-10'']]
|KPP standalone + 3D Interface
|Barron Henderson (U. Florida)<br>Mat Evans (U. York)<br>[[Chemistry Issues|Oxidants and Chemistry WG]]
|Obin Sturm (USC)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|[[GEOS-Chem_Output_Files#NetCDF_File_Format|NetCDF Output Phase 3a: Output diagnostics in NetCDF format]]
|NO2+OH+H2O kinetics
|[[GCST]]
|Mat Evans (York)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|[[GEOS-Chem_Output_Files#NetCDF_File_Format|NetCDF Output Phase 3b: Updates to eliminate differences between single and multi-segmented GEOS-Chem runs]]
|LSODES solver in KPP for faster kinetics
|[[GCST]], Christoph Keller
|Haipeng Lin (Harvard)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|[[PAN|PAN updates]]
|Load balancing in chemistry solver (GCHP)
|Emily Fischer (CSU)
|Zhouran Sun (WashU)
|Chemistry +<br>Performance
|
|
*Delivered to GCST (May 2013)


|-valign="top"
|-valign="top"
|[[NOx-Ox-HC-aerosol#Monthly mean surface distributions|Monthly mean surface methane distributions]]
|Active chemistry in mesosphere for both GCHP and GCClassic
|Lee Murray (NASA GISS/LDEO)
|Helena McDonald (MIT)<br>Sebastian Eastham (ICL)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|[[Sulfate_aerosols#Ocean_ammonia_emission_inventory|Ocean ammonia emission inventory]]
|Updated aromatic oxidation
|Fabien Paulot (NOAA/GFDL)
|Stephen MacFarlane (Wollongong)<br>Jenny Fisher (Wollongong)
|Chemistry
|
|
*Data files delivered to GCST (Jan 2016)
*Needs to be implemented via HEMCO


|-valign="top"
|-valign="top"
|[[Aerosol_optical_properties#Add_BC_absorption_enhancement_factor|Update density of BC to 1.8 and add absorption enhancement factor in input.geos]]
|MCO3 uptake by cloud forming MP; leading to lower PAN
|Xuan Wang (MIT)
|Laura Yang (Harvard)
|Chemistry
|
|
*Delivered to [[GEOS-Chem Support Team|GCST]] (Jan 2016)


|-valign="top"
|-valign="top"
|Species Database Phase 3:
|Implement isotope simulation for CH4 in the carbon simulation
*Harmonizing Henry's Law coefficients across wet and dry deposition
|Lee Murray (Rochester)
|[[GCST]]
|Chemistry
|
|
*Will have to change negative emissions from soil to a first-order loss process


|-valign="top"
|-valign="top"
|[[GEOS-Chem_tracer_units|Uniformity of units]]
|Documentation for adding additional aerosol species
|Lizzie Lundgren ([[GCST]])
|Connor Barker (UCL)
|Documentation
|
|
*Phase 2 (unit uniformity throughout chemistry) to be implemented after Flexchem
*Phase 3 (unit uniformity in some specialty simulations) will be implemented in pieces with input from 3rd party developers
*Phase 4 (removal of area and area-dependent State_Met variables) will be ongoing


|-valign="top"
|-valign="top"
|[[Sulfate_aerosols#Metal_catalyzed_oxidation_of_SO2|Metal catalyzed oxidation of SO2]] (as a switch)
|Column diagnostics
|Becky Alexander (UW)
|Lizzie Lundgren (Harvard)<br>Viral Shah (GMAO)
|Diagnostics
|
|
*'''''Becky Alexander wrote on 14 Sep 2015:'''''
:I've incorporated both the metal catalyzed chemistry and the sulfate isotopes into v10. The metal catalyzed chemistry is much slower than it is when run in v8 and v9. I still have not yet figured out why. I'm not comfortable adding this into the standard model until I figure it out. The emissions are quite different in v10 because of HEMCO, and metal catalyzed chemistry is very sensitive to emissions of primary anthropogenic sulfate, so that's my current hypothesis for the difference. I will probably not get back to debugging this until late October.


|-valign="top"
|-valign="top"
|[[Wet_deposition#Update_SO2_scavenging_in_convective_updrafts_for_consistency|Temporary fix to remove SO2 scavenging in convective updrafts]]
|TOMAS rate diagnostics -- improve performance
|Duncan Fairlie (NASA/LARC)  
|Betty Croft (WashU/Dal)
|Diagnostics +<br>Performance
|
|
*Delivered to [[GEOS-Chem Support Team|GCST]] (Nov 2015)
*'''''Duncan Fairlie wrote on 03 Mar 2016:'''''
:I don't think my fix for this issue is ready for prime time. I get chimneys of essentially unscavenged SO2 extending into the UTLS during Asian monsoon, leading to too much sulfate aloft. I think replacing the instantaneous titration of H2O2 in the standard code with the correct oxidation of SO2 by H2O2 (and O3?) is necessary.


|-valign="top"
|-valign="top"
|[[Wet_deposition#Update_SO2_scavenging_in_convective_updrafts_for_consistency|Update SO2 scavenging in convective updrafts for consistency]]
|Archive gamma values from heterogeneous chemistry
|Duncan Fairlie (NASA/LARC)  
|Bob Yantosca (Harvard)
|Diagnostics
|
|


|-valign="top"
|-valign="top"
|Lightning NOx chemistry parameterization
|RRTMG Documentation
|Alicia Gressent (MIT)
|GCST
|Documentation
|
|


|-valign="top"
|-valign="top"
|Fix to direct/diffuse radiation
|Canopy Physics Model
|Katie Travis (Harvard)
|Sam Silva (MIT)
|Dry Deposition
|
|
*Available at https://zenodo.org/records/3614062#.XzvrH5NKjOR (GEOS-Chem 12.3.0)


|-valign="top"
|-valign="top"
|[[Dry_deposition#Fix_for_NO3_.2B_ISOP_product|Fix for NO3 + ISOP product]]
|Dry deposition diagnostics by land cover
|Katie Travis (Harvard)
|Holly Nowell (FSU)<br>Chris Holmes (FSU)
|Dry Deposition
|
|


|-valign="top"
|-valign="top"
|Update OH + NO2 rate
|Dry deposition process diagnostics
|Barron Henderson (UF)
|Holly Nowell (FSU)<br>Chris Holmes (FSU)
|Dry Deposition
|
|


|-valign="top"
|-valign="top"
|[[Sulfate_aerosols#Tagged_sulfate_and_nitrate_simulation|Tagged sulfate and nitrate simulation]]
|Biomass burning for TOMAS
|Becky Alexander (UW)
|Nicole June (CSU)
|Emissions +<br>Microphysics
|
|


|-valign="top"
|-valign="top"
|Lightning update based on Travis et al. (submitted) and Zhang et al. (2014, ACP)
|Historic biomass burning (1750-2010)
|Katie Travis (Harvard)
|Pengfei Liu (Georgia Tech)
|Emissions
|
|


|-valign="top"
|-valign="top"
|Add aqueous isoprene uptake to SOA scheme
|Rice methane emissions
|Eloise Marais (Harvard)
|Zichong Cheng (Harvard)
|Emissions+<br>Carbon simulation
|
|
*Delivered to GCST (Jul 2016)


|-valign="top"
|-valign="top"
|Enhance default GEOS-Chem simple SOA
|Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3)
|Aerosol Working Group Chairs
|Tia Scarpelli (Carbon Mapper)<br>Melissa Sulprizio (Harvard)
|Emissions
|
|


|-valign="top"
|-valign="top"
|[http://www.atmos-chem-phys.net/16/2819/2016/ A snow NOx source from deep snowpack]
|New prior CO2 biospheric fluxes from CMS-FLUX and GMAO
|Maria Zatko (UW)<br>Becky Alexander (UW)
|Kevin Bowman (JPL)<br>Lesley Ott (GMAO)
|Emissions
|
*GMAO can provide high-resolution  fluxes (as high as 12 km)
 
|-valign="top"
|Snowpack Br2 emission
|Chris Holmes (FSU)
|Emissions
|
 
|-valign="top"
|EDGAR v8.1_toxHg emissions for 1970-2022
|Eric Roy (MIT)
|Emissions
|
 
|-valign="top"
|Improve pressure handling in GCHP advection
|Yuanjian Zhang (WashU)<br>Seb Eastham (ICL)
|GCHP
|
 
|-valign="top"
|Add error trap for duplicate scale factors in HEMCO
|Bob Yantosca (Harvard)
|HEMCO
|
 
|-valign="top"
|Integration testing: Add stretched grid
|Lizzie Lundgren (Harvard)
|Quality Assurance
|
 
|-valign="top"
|Integration testing: Add GCHP mass flux run
|Lizzie Lundgren (Harvard)
|Quality Assurance
|
 
|-valign="top"
|Integration testing: Reinstate TOMAS40
|Betty Croft (Dalhousie/WashU)
|Quality Assurance
|
 
|-valign="top"
|Continue cleanup of C-preprocessor switches
|Lizzie Lundgren (Harvard)
|Structural
|
 
|-valign="top"
|Updates to Luo deposition scheme
|Gan Luo (Albany)
|Wet Deposition
|
*New version, keep as switch (not default)
 
|-valign="top"
|Testing the use of a new scavenging parameterization developed by Luo and Yu for cold cloud with Pb-210 aerosol tracer
|Gan Luo (Albany)<br>Fangqun Yu (Albany)
|Wet Deposition
|
|


|}
|}


--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 17:56, 18 October 2016 (UTC)
== Over the horizon (6-12 months) ==


=== Almost there (< 6 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="400px"|Item
!width="200px"|Feature
!width="300px"|Author(s)
!width="200px"|Contributor(s)
!width="400px"|Status
!width="100px"|Model scope
!width="420px"|Notes and References


|-valign="top"
|-valign="top"
|Update MODIS LAI fields through 2015
|ML algorithms for bulk aerosol
|Barron Henderson (UF)
|Arshad Nair (Albany)<br>Fangqun Yu (Albany)
|Aerosols
|
|


|-valign="top"
|-valign="top"
|[[Python code for GEOS-Chem|Python GEOS-Chem output processing and visualization package]]
|Heterogeneous sulfate chemistry
|Beno&icirc;t Bovy (U. Li&egrave;ge-Belgium)
|Katie Travis (NASA)
|Chemistry
|
|
*Users may download, test it, and submit feedback to Benoit Bovy.


|-valign="top"
|-valign="top"
|Benchmark of stratosphere simulation
|H2 as an active species
|Dylan Jones (U. Toronto)
|Seb Eastham (ICL)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Benchmark for nested NA model
|HCN, acetonitrile as fire tracers
|Jun Wang (UNL)
|Kevin Bates (CU Boulder)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|High-resolution regional emissions (to be implemented via HEMCO)
|Implement ethane in carbon simulation
|Lin Zhang (PKU)<br>Yuxuan Wang (Texas A&M)
|Yuzhong Zhang (Westlake)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Updates to isoprene chemistry, includes:
|Mesospheric source of CO
*Fast photolysis of carbonyl nitrates
|Dylan Jones (UofT)<br>Pam Wales (NASA GSFC)
*Aerosol uptake of organic nitrates
|Emissions
|Jenny Fisher (U. Wollongong)<br>Elo&iuml;se Marais (Harvard)<br>Kelvin Bates (Caltech)<br>Katie Travis (Harvard)
|
|
*This has already been added to the SEAC4RS research version of GEOS-Chem


|-valign="top"
|-valign="top"
|3D chemical source for CO2 and CO; OH for tagged CO and CH4 simulations
|Drought-stress algorithm
|Dylan Jones (U. Toronto)
|Wei Li (Houston)
|Emissions
|
|


|-valign="top"
|-valign="top"
|Hg code updates (emissions, chemistry, ocean, land)
|Physically-based resolution correction for BVOC emissions using MEGAN
|[[Hg and POPs Working Group]]
|May Fu (SUSTech)
|Emissions
|
|


|-valign="top"
|-valign="top"
|Nested CO2, CH4, Hg, TOMAS, adjoint, etc.
|Canadian forest fire prediction system (Canada government forecast model)
|[[Nested Model Working Group]]
|Robin Stevens (Montreal)
|Emissions
|
|


|-valign="top"
|-valign="top"
|Updated nighttime isoprene chemistry
|Cooking emissions (not biofuel)
|Rebecca Schwantes (Caltech)
|Kelvin Bates (CU Boulder)
|Emissions
|
|


|-valign="top"
|-valign="top"
|Updated organic deposition
|State-specific annual emissions scaling factors (US) (1990-2021)
|Katie Travis (Harvard)<br>Jenny Fisher (U. Wollongong)
|Ishir Dutta (MIT)
|Emissions
|
|


|-valign="top"
|-valign="top"
|EPA-derived BC/OA emissions over US (1990-2012)
|GISS-GC online
|David Ridley (MIT)
|Lee Murray (Rochester)
|External model
|
|


|-valign="top"
|-valign="top"
|Remove dependence of species drydep on HNO3 drydep
|Hybrid MPI-OpenMP in GCHP
|Katie Travis (Harvard)<br>Jenny Fisher (U. Wollongong)
|Seb Eastham (MIT)<br>Killian Murphy (York)<br>Lizzie Lundgren (Harvard)
|GCHP
|
|


|-valign="top"
|-valign="top"
|Arctic Hg cycling
|MAPL3: Update to MAPL3 in GCHP, including replacement of ExtData.rc and HISTORY.rc with YAML files
|Jenny Fisher (U. Wollongong)
|Lizzie Lundgren (Harvard)
|GCHP
|
|


|-valign="top"
|-valign="top"
|MOSAIC implementation
|MAPL3: Comply with MAPL "positive" standard in GCHP diagnostic files
|Sebastian Eastham (Harvard)
|Lizzie Lundgren (Harvard)
|GCHP
|
|


|-valign="top"
|-valign="top"
|Updated documentation on setting up new nested domains
|MAPL3: Wildcards in GCHP History
|Lin Zhang (PKU)<br>Yuxuan Wang (Texas A&M)
|Lizzie Lundgren (Harvard)
|GCHP
|
|


|-valign="top"
|-valign="top"
|Nested model publication wiki page
|MAPL3: Output emissions with positive up convention in GCHP
|Jun Wang (UNL)
|Lizzie Lundgren (Harvard)
|GCHP
|
|


|-valign="top"
|-valign="top"
|Past and future fire emissions under RCPs
|Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone
|Loretta Mickley (Harvard)<br>Yuhang Wang (GIT)<br>Shiliang Wu (MT)
|Bob Yantosca (Harvard)
|Performance
|
|


|-valign="top"
|-valign="top"
|QFED fire emissions (up to 2014)
|Photophysical oxidation of aldehydes
|Christoph Keller (Harvard)<br>Katie Travis (Harvard)
|Paulo Sebastianelli (Wollongong)<br>Jenny Fisher (Wollongong)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|[[Aerosols_Working_Group#Sedimentation_of_stratospheric_aerosols|Sedimentation of stratospheric aerosols]]
|DMS updates
|Sebastian Eastham (Harvard)
|Will Porter (UCR)
|Chemistry
|
|


|}
|-valign="top"
|Furans emission and chemistry
|Lixu Jin (Montana)<br>Lu Hu (Montana)
|Chemistry + <br>Emissions
|


--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 18:30, 18 October 2016 (UTC)
|-valign="top"
|Cl2 prodcution from Fe aerosol
|Qianjie Chen (HK Poly)<br>Becky Alexander (UW)
|Chemistry
|


=== Over the horizon (6-12 months) ===
|-valign="top"
 
|VCP emissions
{| border=1 cellspacing=0 cellpadding=5
|Kevin Bates (CU Boulder)
|- bgcolor="#cccccc"
|Emissions
!width="400px"|Item
|
!width="300px"|Author(s)
!width="400px"|Status


|-valign="top"
|-valign="top"
|Dust emissions at nested-grid resolution
|Bidirectional land-atmosphere exchange for Hg
|Yuxuan Wang (Texas A&M)<br>Jun Wang (UNL)
|Yuying Cui (MIT/Tsinghua)
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Archive meteorological fields with higher resolution (for RCPs)
|OH covariances for inversions
|Lee Murray (NASA GISS/LDEO)
|Elise Penn (Harvard)
|Inversions
|
|


|-valign="top"
|-valign="top"
|Land cover module in GEOS-Chem
|CESM2-GC offline
|Jeffrey Geddes (MIT)<br>Michael Long (Harvard)
|Seb Eastham (ICL)<br>Lee Murray (Rochester)
|Met fields
|
|


|-valign="top"
|-valign="top"
|Improved lightning emission scheme
|Re-binning of off-line sea salt and dust for TOMAS
|Lee Murray (NASA GISS/LDEO)
|Betty Croft (Dalhousie)
|Microphysics
|
|


|-valign="top"
|-valign="top"
|Archive high resolution wind fields for sea salt
|TOMAS nucleation updates
|[[GEOS-Chem Support Team]]
|Sam O'Donnell (CSU)
|Microphysics
|
|


|-valign="top"
|-valign="top"
|[[POPs simulation#PCB simulation|PCB simulation]]
|Stratospheric aerosol APM
|Carey Friedman (MIT)<br>Helen Amos (Harvard)
|Fangqun Yu (SUNY Albany)
|Microphysics
|
|


|-valign="top"
|-valign="top"
|VBS SOA option
|Transition from MERRA-2 to GEOS-IT for benchmarking
|Rokjin Park (SNU)
|Yuanjian Zhang (WashU)
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Kz eddy mixing scheme
|Automate integration testing on AWS
|Karen Yu (Harvard)
|Yidan Tang (WashU)
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Update HCN simulation, implement in standard model via Flexchem
|Integration testing: Add across end of year run
|Jenny Fisher (U. Wollongong)
|GCST
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Merge standard simulation with specialty simulations for OVOC, acids, aromatics, dicarbonyls, terpenes
|Integration testing: Add GEOS-IT
|Dylan Millet (UMN)<br>Xin Chen (UMN)
|Yuanjian Zhang (WashU)
|Quality Assurance
|
|


|-valign="top"
|-valign="top"
|Cl chemistry updates
|Separate mixing, emissions, and drydep
|Lyatt Jaegl&eacute; (UW)
|Yuanjian Zhang (WashU)
|Structural
|
|


|-valign="top"
|-valign="top"
|Automate redistribution of NOx in HEMCO
|Intel IFX compiler
|Lee Murray (NASA GISS/LDEO)
|Bob Yantosca (Harvard)
|Structural
|
|


|-valign="top"
|-valign="top"
|Injection height for fire emissions
|CMake option to only build libraries but not executable, also passing C-preprocessor statements to turn off code
|Emily Fischer (CSU)
|Bob Yantosca (Harvard)<br>Lee Murray (Rochester)
|Structural
|
|


|-valign="top"
|-valign="top"
|Option for daily OH, etc. for Hg simulation
|Remove differences introduced when breaking up GC-Classic runs in time; and flexible precision in HEMCO
|Noelle Selin (MIT)
|Lizzie Lundgren (Harvard)
|Structural
|
|


|-valign="top"
|-valign="top"
|Surface ocean Hg boundary conditions from MITgcm
|Limit allocation of State_Met to what is needed per simulation
|Hannah Horowitz (Harvard)
|Melissa Sulprizio (Harvard)
|Structural
|
|


|-
|-valign="top"
|NetCDF output: Flexible diagnostic package and tracer restart file
|Using 3-D precipitation fluxes to calculate precipitation formation and re-evaporation in scavenging (to be consistent with GEOS/GOCART & ground precipitation)
|[[GEOS-Chem Support Team]]
|Gan Luo (Albany)<br>Hongyu Liu (NIA/LaRC)<br>Bo Zhang (NIA/LaRC)
|Wet deposition
|
|


|}
|}


--[[User:Melissa Payer|Melissa Sulprizio]] ([[User talk:Melissa Payer|talk]]) 16:56, 9 June 2015 (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="400px"|Item
!width="200px"|Feature
!width="300px"|Author(s)
!width="200px"|Contributor(s)
!width="400px"|Status
!width="100px"|Model scope
!width="420px"|Notes and References


|-valign="top"
|-valign="top"
|Global GEOS-FP native-resolution met fields to enable flexible nested domains
|Modal aerosol model (MAM7) in GCHP
|Jintai Lin (PKU)<br>Lin Zhang (PKU)<br>[[GEOS-Chem Support Team]]
|Shreya Sharma (MIT)
|Aerosols
|
|


|-valign="top"
|-valign="top"
|DMS oxidation scheme updating
|Online OCIM ocean biogeochemistry
|Tom Breider (Harvard)<br>Becky Alexander (U. Washington)<br>[[Chemistry Issues|Oxidants and Chemistry Working Group]]
|Lee Murray (Rochester)<br>Hannah Horowitz (UIUC)<br>Chris Holmes (FSU)
|Chemistry
|
|


|-valign="top"
|-valign="top"
|Dynamics of stomatal conductance in dry deposition
|Perchlorate chemistry
|Amos Tai (CUHK)
|Yuk Chun Chan (UW)
|Chemistry
|
 
|-valign="top"
|Non-stomatal dry deposition (2-layer canopy model)
|Michael Vermeuel (Purdue)
|Dry Deposition
|
 
|-valign="top"
|Continental chloride particle emissions (salty dust, road salt)
|Jessica Haskins (Utah)
|Emissions
|
 
|-valign="top"
|Multivolatility emission inventory to address gaps in EDGAR/HTAP etc.
|Ruochong (Tshingua)
|Emissions
|
 
|-valign="top"
|Lightning NOx production rates
|Bex Horner (UCL)
|Emissions
|
 
|-valign="top"
|HFO and CF3CHO
|Beth Killen (Wollongong)<br>Jenny Fisher (Wollongong)
|Chemistry
|
 
|-valign="top"
|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"
|-valign="top"
|New dry deposition module (Zhang et al., 2013)
|Soil Hg emissions 2010-2020
|Jintai Lin (PKU)
|Eric Roy (MIT)<br>Ari Feinberg (IQF-CSIC)
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Bi-directional NH3 emissions
|Air-sea exchange parameterization
|Juliet Zhu (CSU)<br>Lin Zhang (PKU)
|Eric Roy (MIT)
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Arsenic simulation
|Soil Hg emissions parameterization
|Shiliang Wu (MT)
|Ari Feinberg (IQF-CSIC)
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Hg benchmark updates for atmosphere and ocean
|Sea salt uptake of GOM
|Hannah Horowitz (Harvard)<br>Viral Shah (UW)<br>Shaojie Song (MIT)
|Eric Roy (MIT)
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Emission scheme of dust: subgrid wind variation to remove resolution dependence and better interannual variability
|Photoreduction rate constant
|David Ridley (MIT)
|Eric Roy (MIT)
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Ozone damage to vegetation
|New observations (2010-2020) in standardized Hg benchmark for intercomparison
|Amos Tai (CUHK)
|Eric Roy (MIT)/Ari Feinberg (IQF-CSIC)
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Implement biogenic emissions of ethane, propane
|Hg simulation in GCHP
|Zitely Tzompa (CSU)
|Eric Roy (MIT)
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Global evaluation of using LWC and ICW variables from met fields
|OCIM - biogeochemical model - (C/P/N/Fe - no Hg yet) (MATLAB)
|[http://web.atmos.ucla.edu/~qli/trop/Home.html UCLA group]<br>Hongyu Liu (NIA/NASA LARC)<br>Betty Croft (Dalhousie)
|Hannah Horowitz (UIUC)
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Joint CO/CO2/CH4 forward model simulation
|Possibly updating Hg oxidation chemistry based on Utah field campaigns
|Nicholas Deutscher (U. Wollongong)
|Jessica Haskins (Utah)
|Hg simulation
|
|


|-valign="top"
|-valign="top"
|Subgrid scale precipitation variability
|New halogen/aerosol fields (surface area / AOD) from 10-year 14.4 benchmark simulation available online
|[http://acmg.seas.harvard.edu/ Harvard group]
|Viral Shah (NASA GMAO); Eric Roy (MIT); Ari Feinberg (IQF-CSIC)
|Input data
|
|


|-valign="top"
|-valign="top"
|Dry deposition: Update the ozone dry deposition scheme
|Extend IMI to CO2 (ICI)
|Murphy group (UofT)
|Hannah Nesser (JPL)  
|Inversions
|
|


|-valign="top"
|-valign="top"
|Country-based weekend/weekday variability for EDGAR v4.2
|Global emission inventory of metals
|Lee Murray (NASA GISS/LDEO)<br>Christoph Keller (Harvard)
|Tzung-May Fu (SUSTech); He Zhong Tian (Peking Normal U)
|Metals simulation
|
|


|-valign="top"
|-valign="top"
|Sea salt emission from sea ice
|Investigate and improve performance of aerosol chemistry
|Jiayue Huang (UW)
|Bob Yantosca (Harvard)
|Performance
|
|


|-valign="top"
|-valign="top"
|Resolution-independent lightning NOx scaling
|PAH - update from version 11
|Lee Murray (NASA GISS/LDEO)
|Lexia Cicone (MIT)
|POPs simulation
|
|


|-valign="top"
|-valign="top"
|Historical Hg emissions (1850-present)
|Species database more accessible; doc updates; TOL discussion
|Hannah Horowitz (Harvard)
|Jessica Haskins (Utah)
|Structural
|
|


|-valign="top"
|-valign="top"
|Nested-grid model with GEOS-FP at 1/2&deg; x 5/8&deg; resolution
|Stretched-grid plotting in GCPy
|[[Nested Model Working Group]]
|Killian Murphy (York)
|Tools
|
|


|-valign="top"
|-valign="top"
|TNO emissions over Europe (7km)
|Model inter-comparison of transport (GEOS, GCHP, GCClassic)
|[http://acmg.seas.harvard.edu/geos/geos_people.html#athens Greece team]
|Lizzie Lundgren (Harvard), Emma Knowland (NASA)
|Transport
|
|


|-valign="top"
|-valign="top"
|Re-evaluation of SST dependence of sea salt emissions
|Comparing mass fluxes in GCHP vs. traditional lat/lon wind
|Jiayue Huang (UW)
|Yuanjian Zhang (WashU), Seb Eastham (ICL)
|Transport
|
|


|}
|}
--[[User:Melissa Payer|Melissa Sulprizio]] 14:08, 11 May 2015 (EDT)

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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