Difference between revisions of "GEOS-Chem model development priorities"

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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/2017/index.html International GEOS-Chem Meeting (IGC8)] in May 2017 and will be continuously updated based on code readiness and input from the Working Groups and the Steering Committee.
+
'''''[[Main_Page|GEOS-Chem Main Page]] | [[GCHP_Main_Page|GCHP Main 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.
+
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]].
  
−
== List of priorities from IGC8 ==
+
== Release schedule ==
  
−
The items listed below are in different stages of readiness and will be included in future versions of the model.
+
Please see the [http://wiki.seas.harvard.edu/geos-chem/images/e/e1/GEOS-Chem_Release_Proposal.pdf GEOS-Chem Release Proposal] outlining the procedure and schedule for releasing GEOS-Chem versions.  
  
−
=== Slated for v11-03 ===
+
== Merged and awaiting release ==
  
−
The following updates are now slated for inclusion into [[GEOS-Chem v11-03]]:
+
See the links below for items merged and awaiting release.
  
 
{| border=1 cellspacing=0 cellpadding=5  
 
{| border=1 cellspacing=0 cellpadding=5  
 
|-bgcolor="#CCCCCC"
 
|-bgcolor="#CCCCCC"
−
!width="400px"|Feature
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!width="200px"|Patch version in development
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!width="250px"|Submitted by
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!width="200px"|Major version in development
−
!width="100px"|Type
+
−
!width="300px"|Status
+
−
 
+
−
|-
+
−
!colspan="4" bgcolor="#CCFFFF"|Transport updates
+
  
 
|-valign="top"
 
|-valign="top"
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|[[Transport_Working_Group#Common_set_of_tracers_in_GEOS-Chem_and_GEOS|Common set of tracers in GEOS-Chem and GEOS]]
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|align="center"| -
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|Transport WG<br>[[GCST]]
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|align="center"|'''[[GEOS-Chem 14.0.0]]'''
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|Benchmarking
+
−
|
+
−
*Ready to be added, ask GMAO
+
  
−
|-
+
|}
−
!colspan="4" bgcolor="#CCFFFF"|Chemistry updates
+
  
−
|-valign="top"
+
== Feature integration in progress ==
−
|[[Stratospheric_chemistry#Treatment_of_the_mesosphere_in_UCX_simulations|Extend UCX into the mesosphere]]
+
−
|Sebastian Eastham (MIT)
+
−
|Science
+
−
|
+
−
*Ready to be added
+
  
−
|-
+
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.
−
!colspan="4" bgcolor="#CCFFFF"|Emissions updates
+
  
−
|-valign="top"
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{| border=1 cellspacing=0 cellpadding=5
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|[[Volcanic_SO2_emissions_from_Aerocom#OMI-based_volcanic_emissions|OMI-based volcanic emissions 2005-2012]]
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|-bgcolor="#CCCCCC"
−
|Cui Ge (U. Iowa)<br>Jun Wang (U. Iowa)
+
!width="200px"|Feature
−
|Science
+
!width="200px"|Contributor(s)
−
|
+
!width="100px"|Model scope
−
*Need to implement a fix to handle missing data for 2012/09 thru 2012/12.  We can do one of 2 things:
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!width="100px"|Ease of implementation
−
**Create files with zero emissions for 2012/09 thru 2012/12.
+
!width="300px"|Notes and References
−
***But because data for 2013- is copied from 2012, this will mean that the last 3 months of the year have no volcano emissions.
+
−
**Link to the existing volcano emsisions files for September thru December
+
  
−
|-valign="top"
 
−
|[[Mineral_dust_aerosols#Anthropogenic_PM2.5_dust_source_in_GEOS-Chem|Anthropogenic PM2.5 dust source]]
 
−
|Sajeev Philip (Dalhousie)
 
−
|Science
 
−
|
 
−
*Need to fix an "under-the-hood" issue in HEMCO that causes 1200 Tg of dust to be emitted by this update.
 
  
 
|-valign="top"
 
|-valign="top"
−
|[[FINNv1_biomass_burning_emissions|FINN biomass burning emissions for 2014-2016]]
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|TOMAS in GCHP
−
|Barron Henderson (US EPA)
+
|Betty Croft (WashU)
−
|Science
+
|Aerosols
 +
|Simple
 
|
 
|
−
*Pending receipt of corrected data files
+
*[https://github.com/geoschem/GCHP/pull/221 geoschem/GCHP PR #221]
 +
*[https://github.com/geoschem/geos-chem/pull/1261 geoschem/geos-chem PR #1261]
 +
*[https://github.com/geoschem/HEMCO/pull/145 geoschem/HEMCO PR #145]
  
 
|-valign="top"
 
|-valign="top"
−
|GFAS biomass burning emissions
+
|[https://gmd.copernicus.org/articles/13/2475/2020/gmd-13-2475-2020.pdf Adaptive chemical solver] (as option) / KPP 3.0.0
−
|Mat Evans (York)
+
|Mike Long (Harvard) <br> Haipeng Lin (Harvard) <br> Bob Yantosca (GCST) <br> Lu Shen (PKU)
−
|Science
+
|Chemistry
 +
|Complicated
 
|
 
|
−
 
+
*Lin, H., M.S. Long, R. Sander, R.M. Yantosca, L.A. Estrada, L. Shen, and D.J. Jacob, An adaptive auto-reduction solver for speeding up integration of chemical kinetics in atmospheric chemistry models: implementation and evaluation in the Kinetic Pre-Processor (KPP) version 3.0.0, submitted to JAMES,  https://doi.org/10.31223/X5505V, 2022.
−
|-
+
−
!colspan="4" bgcolor="#CCFFFF"|Aerosol updates
+
−
 
+
 
|-valign="top"
 
|-valign="top"
−
|Sea salt aerosol alkalinity
+
|[https://acp.copernicus.org/articles/19/7055/2019/ Joint CO2-CO-CH4-OCS simulation via KPP]
−
|Qianjie Chen (UW)<br>Becky Alexander (UW)<br>Xuan Wang (Harvard)
+
|Beata Bukosa (NIWA)<br>Kevin Bowman (JPL)<br>Mike Long (Harvard)
−
|Science
+
|Specialty simulation
 +
|Medium
 
|
 
|
−
*UW version delivered to GCST (Nov 2017)
+
*[https://github.com/geoschem/geos-chem/issues/654 geoschem/geos-chem #654]
  
 
|-valign="top"
 
|-valign="top"
−
|VBS SOA option
+
|RO2 diagnostic
−
|Rokjin Park (SNU)
+
|Melissa Sulprizio (Harvard)
−
|Science
+
|Diagnostics
 +
|Simple
 
|
 
|
−
*Code has been implemented in the ancient v9-01-02 version. 
 
−
*Bringing this up to the current SOA model (simple SOA, complex SOA) will likely involve significant effort.
 
−
 
−
|-
 
−
!colspan="4" bgcolor="#CCFFFF"|Specialty simulation updates
 
  
 
|-valign="top"
 
|-valign="top"
−
|Oxidant fields from v10 for 2006-2012
+
|[https://github.com/geoschem/geos-chem/issues/770 Output satellite diagnostics as NetCDF]
−
*3D chemical source for CO2, CO
+
|Eloise Marais (UCL)  
−
*OH for tagged CO & CH4
+
|Diagnostics
−
|Dylan Jones (UofT)
+
|Simple
−
|Science
+
 
|
 
|
−
*Will make data files available on ftp site
+
*See [https://github.com/geoschem/geos-chem/pull/1134 geoschem/geos-chem #1134]
  
 
|-valign="top"
 
|-valign="top"
−
|Africa nested-grid for GEOS-FP and MERRA-2
+
|[https://github.com/geoschem/geos-chem/issues/331 Provide climatologies for open fire emissions]
−
|Eloise Marais (U. Birmingham)
+
|Melissa Sulprizio (Harvard)
−
|Science
+
|Emissions
 +
|Simple
 
|
 
|
−
*Delivered to GCST (Dec 2017)
 
−
*Could be implemented with Jiawei Zhuang's FlexGrid
 
  
 
|-valign="top"
 
|-valign="top"
−
|West Africa nested-grid for GEOS-FP
+
|[https://github.com/geoschem/geos-chem/issues/655 Climatologies for lightning NOx]
−
|Mat Evans (York)<br>Eleanor Morris (York)
+
|Lee Murray (Rochester)
−
|Science
+
|Emissions
 +
|Simple
 
|
 
|
−
*Could be implemented with Jiawei Zhuang's FlexGrid
 
  
 
|-valign="top"
 
|-valign="top"
−
|[[Sulfate_aerosols#Tagged_sulfate_and_nitrate_simulation|Tagged sulfate simulation]]
+
|[https://github.com/geoschem/geos-chem/discussions/1022 Add new species concentration diagnostic in units of molec/cm3]
−
|Becky Alexander (UW)
+
|Haipeng Lin (Harvard)
−
|Science
+
|Diagnostics
 +
|Simple
 
|
 
|
 +
*See [https://github.com/geoschem/geos-chem/pull/1264 geoschem/geos-chem PR #1264]
  
 
|-valign="top"
 
|-valign="top"
−
|Arsenic simulation
+
|Identify and remove memory leaks and similar issues
−
|Shiliang Wu (MT)
+
|Bob Yantosca (Harvard)
−
|Science
+
|Structural
 +
|Medium
 
|
 
|
−
 
+
*See [https://github.com/geoschem/geos-chem/pull/1353 github.com/geos-chem PR #1353]
−
|-
+
−
!colspan="4" bgcolor="#CCFFFF"|Structural updates
+
  
 
|-valign="top"
 
|-valign="top"
−
|Updated flux diagnostics
+
|Update transport tracer simulation for consistency with the tracer gridded component in GEOS
−
|Chris Holmes (Florida State)<br>[[GCST]]
+
|Melissa Sulprizio (Harvard)
−
|Structural/<br>Benchmarking
+
|TransportTracer simulation
 +
|Simple
 
|
 
|
−
*Work has not yet begun
 
  
 
|-valign="top"
 
|-valign="top"
−
|Benchmark of stratospheric simulation
+
|Bug fix for GFAS in GCHP
−
|Dylan Jones (U. Toronto)
+
|Lizzie Lundgren (Harvard)
−
|Benchmarking
+
|GCHP
 +
|Simple
 
|
 
|
−
*1-yr benchmarks for GEOS-Chem v11-01d and later include comparisons with OSIRIS O3
 
−
*Waiting on OSIRIS NO2 data
 
−
*Waiting on comparisons with ACE-FTS data
 
  
 
|-valign="top"
 
|-valign="top"
−
|Add total column O3 to benchmarks
+
|Use pointers to internal state for species arrays in GCHP/GEOS
−
|Chris Holmes (FSU)<br>[[GCST]]
+
|Lizzie Lundgren (Harvard)
−
|Benchmarking
+
|GCHP/GEOS
 +
|Medium
 
|
 
|
−
*Deferred until v11-03
 
−
*Also note: GCST plans on migrating benchmark plotting code from IDL to Python in v11-03
 
  
 
|-valign="top"
 
|-valign="top"
−
|ObsPack diagnostic as netCDF replacement for planeflight_mod.F
+
|[https://github.com/geoschem/geos-chem/issues/1274 Revision to a rate constant for the C2H4 scheme]
−
|Andy Jacobson (NOAA/ESRL)
+
|Kelvin Bates (Harvard)
−
|Structural
+
|Chemistry
 +
|Easy
 
|
 
|
−
*Delivered to GCST (May 2017)
 
  
 
|-valign="top"
 
|-valign="top"
−
|[[GEOS-Chem_v11-02#Discrepancies_in_single-stage_simulations_vs_multi-stage_simulations|Updates to eliminate differences between single and multi-segmented GEOS-Chem runs]]
+
|[https://github.com/geoschem/geos-chem/issues/1298 Fix product in HOBr/Cl + S(IV) reactions]
−
|[[GCST]]<br>Christoph Keller
+
|Xuan Wang (CUHK)
−
|Bug fix<br>Structural
+
|Chemistry
 +
|Easy
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Further structural updates to facilitate interfacing GEOS-Chem with external models (e.g. WRF, CAM, CESM)
+
|[https://github.com/geoschem/geos-chem/issues/1235 Add MO2 + NO3 reaction]
−
|[[GCST]]
+
|Kelvin Bates (Harvard)
−
|Structural
+
|Chemistry
 +
|Easy
 
|
 
|
−
*Ongoing
 
  
−
|-
+
|}
−
!colspan="4" bgcolor="#CCFFFF"|Expansion of model capabilities
+
 
 +
== Delivered and in the queue ==
 +
 
 +
Features listed in this table have been delivered to the GEOS-Chem Support Team and are prioritized to be integrated 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="300px"|Notes and References
  
 
|-valign="top"
 
|-valign="top"
−
|[[FlexGrid|FlexGrid: Use HEMCO to read met fields and enable nested simulations over any custom domains]]
+
|[https://doi.org/10.34894/SZ2KOI AMAP 2015 emissions from GMA2018]
−
|Jiawei Zhuang (Harvard)<br>Jintai Lin (PKU)
+
|Helene Angot(MIT)<br>Ari Feinberg (MIT)<br>Noelle Selin (MIT)
−
|Structural
+
|Hg simulation
 +
|Simple
 
|
 
|
−
*Delivered to GCST (Oct 2016)
+
* Delivered to GCST (Jul 2022)
−
*Code is ready, we were waiting for a stable v11-02 release
+
−
*FlexGrid will facilitate adding new nested-grids or reading new met field products from disk
+
  
 
|-valign="top"
 
|-valign="top"
−
|[[ISORROPIA_II#Investigating_persistent_noise_observed_in_ISORROPIA_output|Update ISORROPIA from v2.0 to v2.2, in order to remove persistent noise in output]]
+
|[https://pubs.rsc.org/en/content/articlehtml/2022/em/d2em00032f Improvements in modelled Hg0 dry deposition to land]
−
|Seb Eastham (Harvard)
+
|Ari Feinberg (MIT)<br>Noelle Selin (MIT)<br>Thandolwethu Dlamini (MIT)<br>Martin Jiskra (UBasel)<br>Viral Shah (Harvard)
−
|Science
+
|Hg simulation
 +
|Simple
 
|
 
|
−
*ISORROPIA v2.2 code is already present in v11-02, but is deactivated by default.
+
* See [https://github.com/geoschem/geos-chem/pull/1367 geoschem/geos-chem PR #1367]
−
*It can be activated by setting a single <tt>#ifdef</tt> switch.
+
* The study is already published and could be incorporated into the standard model as a default. Some tweaking to the reduction rate may be required as the model halogen oxidation has also been updated in v13.4.
  
 
|-valign="top"
 
|-valign="top"
−
|Archival of roughness length for temperature z0T
+
|[https://github.com/geoschem/geos-chem/issues/1301 HTAPv3 at 0.1 deg]
−
|[[GCST]]
+
|Dandan Zhang (WashU)
−
|Met processing
+
|Emissions
 +
|Simple
 
|
 
|
−
*Work has not yet begun
+
*Delivered to GCST (Jul 2022)
 +
 
 
|}
 
|}
  
−
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 14:12, 24 May 2018 (UTC)
+
== Delivered but not yet prioritized ==
  
−
=== Almost there (< 6 months) ===
+
Features listed in this table have been delivered to the GEOS-Chem Support Team but are not yet prioritized for integration into GEOS-Chem.
  
−
{| border=1 cellspacing=0 cellpadding=5
+
{| border=1 cellspacing=0 cellpadding=5  
−
|- bgcolor="#cccccc"
+
|-bgcolor="#CCCCCC"
−
!width="400px"|Item
+
!width="200px"|Feature
−
!width="250px"|Author(s)
+
!width="200px"|Contributor(s)
−
!width="100px"|Type
+
!width="100px"|Model scope
−
!width="300px"|Status
+
!width="100px"|Ease of implementation
−
 
+
!width="300px"|Notes and References
−
|-
+
−
!colspan="4" bgcolor="#CCFFFF"|Transport updates
+
  
 
|-valign="top"
 
|-valign="top"
−
|[https://www.geosci-model-dev-discuss.net/gmd-2017-125/ GEOS resolution & subgrid convection]
+
|Tagged O3 simulation in GCHP
−
|Karen Yu (Harvard)
+
|Xingpei Yu (PKU)<br>Jourdan He (WashU)
−
|Science
+
|TagO3 simulation
 +
|Simple
 
|
 
|
−
*To be installed by Bob Yantosca (Harvard), tested by Tailong He (Toronto)
+
*[https://github.com/geoschem/geos-chem/pull/1167 geoschem/geos-chem PR #1167]
−
*Work to begin after v11-02 release
+
* Needs to be updated to a more recent version of GCHP
−
 
+
−
|-
+
−
!colspan="4" bgcolor="#CCFFFF"|Chemistry updates
+
  
 
|-valign="top"
 
|-valign="top"
−
|N2O5 hydrolysis updates
+
|[https://doi.org/10.7910/DVN/23BRII Global continental chlorine (pCl and HCl) emissions]
−
|Viral Shah (UW)
+
|Bingqing Zhang (Georgia Tech)<br>Pengfei Liu (Georgia Tech)
−
|Science
+
|Emissions
 +
|Simple
 
|
 
|
−
*Defer until paper is submitted (Summer 2018)
+
*Delivered to GCST (Jul 2022)
−
*Code from v10 (SMVGEAR) needs to be translated to v11 (FlexChem); this may take some effort
+
  
 
|-valign="top"
 
|-valign="top"
−
|H2 chemistry in UCX
+
|[https://github.com/geoschem/geos-chem/pull/629 Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange]
−
|Chris Holmes (FSU)
+
|Joey Lam(CUHK)<br>Amos Tai (CUHK)
 
|Science
 
|Science
 +
|Simple
 
|
 
|
−
*Defer until paper is submitted
+
*Delivered to GCST (Feb 2021)
−
*Estimate Fall 2018 or sooner
+
* [https://github.com/geoschem/geos-chem/pull/629 geoschem/geos-chem #629]
  
 
|-valign="top"
 
|-valign="top"
−
|Updated chlorine chemistry
+
|LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100
−
|Xuan Wang (Harvard)
+
|Yang Li (Baylor University)<br>Loretta Mickley (Harvard)
−
|Science
+
|Emissions
 +
|Simple
 
|
 
|
−
*Defer until the paper is submitted
+
*Data files delivered to GCST (July 2021)
 +
*Data are quite large - need to think about storage, compression
  
 
|-valign="top"
 
|-valign="top"
−
|[[Chemistry_Issues#Correcting_ozone_from_the_height_of_the_lowest_model_level_to_the_surface|ND49 timeseries diagnostic for correcting ozone from the height of the lowest model level to 10m]]
+
|[https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2006GL026015 Stratospheric HCN chemistry]
−
|Katie Travis (MIT)
+
|Armin Kleinbohl (JPL)<br>Debra Weisenstein (Harvard, retired)
−
|Structural
+
|Chemistry
 +
|Medium
 
|
 
|
−
*Defer until the paper is submitted
+
*Delivered to GCST (Jun 2020)
 +
 
 +
|}
 +
 
 +
== Ready but not delivered ==
 +
 
 +
Features listed in this table are ready but have not been delivered to the GEOS-Chem Support Team.
 +
 
 +
{| border=1 cellspacing=0 cellpadding=5
 +
|-bgcolor="#CCCCCC"
 +
!width="200px"|Feature
 +
!width="200px"|Contributor(s)
 +
!width="100px"|Model scope
 +
!width="300px"|Notes and References
  
 
|-valign="top"
 
|-valign="top"
−
|OH + NO2 rate update
+
|Updating VOC fire emissions and adding lumped furan
−
|Barron Henderson (EPA)
+
|Colette Heald (MIT)<br>Jessica Haskins (MIT)
−
|Science
+
|Chemistry
 
|
 
|
 +
* Carter, T. S., Heald, C. L., Kroll, J. H., Apel, E. C., Blake, D., Coggon, M., Edtbauer, A., Gkatzelis, G., Hornbrook, R. S., Peischl, J., Pfannerstill, E. Y., Piel, F., Reijrink, N. G., Ringsdorf, A., Warneke, C., Williams, J., Wisthaler, A., and Xu, L.: An Improved Representation of Fire Non-Methane Organic Gases (NMOGs) in Models: Emissions to Reactivity, Atmos. Chem. Phys. Discuss. [preprint], https://doi.org/10.5194/acp-2022-438, in review, 2022.
  
 
|-valign="top"
 
|-valign="top"
−
|Aromatics and dicarbonyl chemistry
+
|Nitrate photolysis
−
|William Porter (MIT)<br>Tzung-May Fu (PKU)
+
|Viral Shah (NASA GMAO)
−
|Science
+
|Chemistry
 
|
 
|
 +
* Shah, V., D.J. Jacob, R. Dang, L.N. Lamsal, S.A. Strode, S.D. Steenrod, K.F. Boersma, S.D. Eastham, T.M. Fritz, C. Thompson, J. Peischl, I. Bourgeois, I.B. Pollack, B.A. Nault, R.C. Cohen, P. Campuzano-Jost, J.L. Jimenez, S.T. Andersen, L.J. Carpenter, T. Sherwen, and M.J. Evans, Nitrogen oxides in the free troposphere: Implications for tropospheric oxidants and the interpretation of satellite NO2 measurements, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2022-656, 2022.
  
 
|-valign="top"
 
|-valign="top"
−
|Document chemical mechanism in KPP file
+
|Online H2 chemistry
−
|Mat Evans (York)
+
|Maria Paula Pérez-Peña (UNSW)<br>Jenny Fisher (UOW)<br>Dylan Millet (UMN)
−
|Structural
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Diurnal variability for NH3
+
|Alk4 & R4N2 chemistry
−
|Henze group
+
|Jared Brewer (Harvard)
−
|Science
+
|Chemistry
 
|
 
|
 +
* Brewer, J.F., D.J. Jacob, S.H. Jathar, Y. He, A. Akherati, S. Zhai, D.S. Jo, A. Hodzic, B.A. Nault, P. Campuzano-Jost, J.L. Jimenez, R.J. Park, Y.J. Oak, and H. Liao, A scheme for representing aromatic secondary organic aerosols in chemical transport models: application to source attribution of organic aerosols over South Korea during the KORUS-AQ campaign, submitted to J. Geophys. Res., 2022.
  
 
|-valign="top"
 
|-valign="top"
−
|Uptake of HNO3 onto coarse-mode sea salt
+
|Organic acids (RCOOH)
−
|Prasad Kasibhatla (Duke)
+
|Katie Travis (NASA)
−
|Science
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Photolysis of NITs
+
|Update reactions with new JPL & IUPAC recommendations
−
|Prasad Kasibhatla (Duke)
+
|Kelvin Bates (Harvard)
−
|Science
+
|Chemistry
 
|
 
|
−
 
+
* Currently running simulations to check magnitude of changes
−
|-
+
−
!colspan="4" bgcolor="#CCFFFF"|Emissions updates
+
  
 
|-valign="top"
 
|-valign="top"
−
|Grid-independent lightning NOx emissions (3-hourly)
+
|Improve carbon & nitrogen conservation in reactions
−
|Lee Murray (Rochester)
+
|Kelvin Bates (Harvard)
−
|Science
+
|Chemistry
 
|
 
|
−
*Data has not yet been transferred to GCST
 
  
 
|-valign="top"
 
|-valign="top"
−
|Grid-independent dust emissions (hourly)
+
|Blowing snow sea salt in TOMAS
−
|David Ridley (MIT)
+
|Betty Croft (Dalhousie)
−
|Science
+
|Aerosols
 
|
 
|
−
*Data has not yet been transferred to GCST
 
  
 
|-valign="top"
 
|-valign="top"
−
|Grid-independent biogenic emissions (hourly)
+
|Geologic emission of ethane and propane
−
|Jintai Lin (PKU)
+
|Matthew Rowlinson and Mat Evans(York)
−
|Science
+
|Emissions
 
|
 
|
−
*Data has not yet been transferred to GCST
+
* Global source from https://doi.org/10.1038/s41561-018-0073-0 with spatial distribution from https://doi.org/10.5194/essd-11-1-2019
  
 
|-valign="top"
 
|-valign="top"
−
|Grid-independent sea salt emissions (hourly)
+
|New version of CEDS at 0.1 deg
−
|Jintai Lin (PKU)
+
|Emma Knowland (NASA)
−
|Science
+
|Emissions
 
|
 
|
−
*Data has not yet been transferred to GCST
 
  
 
|-valign="top"
 
|-valign="top"
−
|EPA-derived BC/OA emissions over US (1990-2012)
+
|[https://github.com/geoschem/geos-chem/issues/550 MEIC (China regional) for 2000-2017 at 0.5x0.625 deg]
−
|David Ridley (MIT)<br>Chi Li (Dalhousie)
+
|Shixian Zhai (Harvard)
−
|Science
+
|Emissions
 
|
 
|
−
*Emissions are available but need to be formatted properly.
+
* Need permission from Qiang Zhang (Tsinghua U.) to distribute data
−
*Could be ready by Fall-Winter 2018, depending on D. Ridley's availability
+
  
 
|-valign="top"
 
|-valign="top"
−
|EPA NEI2011 Version EK
+
|KORUS-AQ emissions for East Asia
−
|Zitely Tzompa-Sosa (CSU)<br>Emily Fischer (CSU)
+
|Katie Travis (NASA)
−
|Science
+
|Emissions
 
|
 
|
−
*Estimate Late 2018 or sooner
+
* Need permission to distribute data
  
−
|-valign="top"
+
|-valign-"top"
−
|[[MASAGE_NH3_inventory|MASAGE inventory in HEMCO as default]]
+
|[https://pubs.rsc.org/en/content/articlelanding/2022/EM/D2EM00019A Australian anthropogenic Hg emissions]
−
|Fabien Paulot (NOAA/GFDL)<br>Amos Tai (CUHK)
+
|Stephen MacFarlane (UOW)<br>Jenny Fisher (UOW)<br> Hannah Horowitz (U. Illinois)<br>Viral Shah (Harvard)
−
|Science
+
|Hg simulation
 
|
 
|
−
*MASAGE data is already available.
 
−
*GCST would need assistance from the user community to prepare HEMCO configuration files such that we do not double-count agricultural NH3 from MASAGE and other inventories.  This has been the main delay.
 
−
*F. Paulot has left the GC community.
 
  
−
|-valign="top"
+
|-valign-"top"
−
|[[MASAGE_NH3_inventory#Non-agricultural_NH3_for_use_with_MASAGE|Non-agricultural NH3 for use with MASAGE]]
+
|WRF-GC Hg simulation
−
|Amos Tai (CUHK)
+
|Xiaotian Xu (Nanjing U.)<br>Yanxu Zhang (Nanjing U.)
−
|Science
+
|Hg simulation<br>WRF-GC
 
|
 
|
−
*Waiting on data
 
  
 
|-valign="top"
 
|-valign="top"
−
|[[Sulfate_aerosols#Ocean_ammonia_emission_inventory|Ocean ammonia emission inventory]]
+
|Updated HgII gas-partical partitioning
−
|Fabien Paulot (NOAA/GFDL)
+
|Kaiyun Liu (Tsinghua U.)<br>Qingru Wu (Tsinghua U.)<br>Shuxiao Wang (Tsinghua U.)
−
|Science
+
|Hg simulation
 
|
 
|
−
*Data files delivered to GCST (Jan 2016)
+
* Should be option, not default
−
*Needs to be implemented via HEMCO, which is the primary delay
+
  
 
|-valign="top"
 
|-valign="top"
−
|Injection height for fire emissions
+
|Dry deposition to F90 (readability)
−
|Juliet Zhu (CSU)<br>Emily Fischer (CSU)
+
|Chris Holmes (FSU)
−
|Science
+
|Dry deposition
 
|
 
|
 +
|}
 +
 +
== 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.
 +
 +
{|border=1 cellspacing=0 cellpadding=5
 +
|- bgcolor="#cccccc"
 +
!width="200px"|Feature
 +
!width="200px"|Contributor(s)
 +
!width="100px"|Model scope
 +
!width="420px"|Notes and References
  
−
|-
 
−
!colspan="4" bgcolor="#CCFFFF"|Surface fluxes and land usage updates
 
  
 
|-valign="top"
 
|-valign="top"
−
|Carbon bottom up fluxes: anthro, ocean, land
+
|DMS Chemistry
−
|Kevin Bowman (JPL)
+
|Linia Tashmim (UC Riverside)<br>William Porter (UC Riverside)
−
|Science
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Online O3-LAI coupling in GEOS-Chem
+
|PPN+hv, PPN+OH
−
|Amos Tai (CUHK)
+
|Robert Ryan (UCL)
−
|Science
+
|Chemistry
 
|
 
|
  
−
|-
+
|-valign="top"
−
!colspan="4" bgcolor="#CCFFFF"|Wet deposition updates
+
|MBO
 +
|Michael Vermeuel (UMN)
 +
|Chemistry
 +
|
  
 
|-valign="top"
 
|-valign="top"
−
|Wet deposition parameterizations: pH dependency, Henry's law coefficients, etc.
+
|[https://github.com/geoschem/geos-chem/issues/1094 Stratospheric adjustment with RRTMG in GEOS-Chem]
−
|Sarah Safieddine (MIT)<br>GCST
+
|Seb Eastham (MIT)
 
|Science
 
|Science
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Wet scavenging in mixed-phase clouds
+
|Re-binning of off-line sea salt and dust for use in TOMAS
−
|Bo Zhang (NIA/NASA Langley)
+
|Betty Croft (Dalhousie)
−
|Science
+
|Aerosols
 
|
 
|
−
*Defer until paper is published
 
−
*Estimate Fall 2018
 
  
−
|-
+
|-valign="top"
−
!colspan="4" bgcolor="#CCFFFF"|Specialty simulation updates
+
|Adaption of TOMAS' in-cloud aqueous sulfate production for KPP versus sulfate_mod.F90
 +
|Betty Croft (Dalhousie)
 +
|Aerosols
 +
|
  
 
|-valign="top"
 
|-valign="top"
−
|AMAP/UNEP 2035 for Hg simulation
+
|ML algorithms for bulk aerosols
−
|Helene Angot (MIT)
+
|Arshad Nair (SUNY Albany)<br>Fangqun Yu (SUNY Albany)
−
|Science
+
|Aerosols
 
|
 
|
−
*Data is available, but has not been transferred to GCST yet
 
  
 
|-valign="top"
 
|-valign="top"
−
|Radon emission update
+
|PM2.5 and PM10 calculations: aerodynamic vs geometric diameters
−
|Bo Zhang (NIA/NASA Langley)
+
|Shixian Zhai (Harvard)
−
|Science
+
|Aerosols
 
|
 
|
−
*Defer until paper is published
 
−
*Estimate Fall 2018
 
  
 
|-valign="top"
 
|-valign="top"
−
|[[POPs simulation#PCB simulation|PCB simulation]]
+
|Updates to Hodzic SOA scheme
−
|Colin Thackray (Harvard)<br>Carey Friedman (formerly MIT)<br>Helen Amos (formerly Harvard)
+
|Jared Brewer (Harvard)
−
|Science
+
|Aerosols
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|New EDGAR sectoral inventory for Hg (1970-2012)
+
|Automated reduction in isoprene scheme
−
|Amanda Giang (MIT)
+
|Dan Westervelt (Lamont-Doherty)
−
|Science
+
|Aerosols
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Archive GISS met fields from RCP scenarios for community
+
|Brown carbon chemsitry
−
|Lee Murray (Rochester)
+
|Jingqiu Mao (U. Alaska)<br>Xuan Wang (CUHK)
−
|Science
+
|Aerosols
 
|
 
|
  
−
|-
 
−
!colspan="4" bgcolor="#CCFFFF"|Structural updates
 
  
 
|-valign="top"
 
|-valign="top"
−
|Clean up SOA diagnostics
+
|GEOS resolution and subgrid convection - Part 2 RAS parameter tuning
−
|GCST
+
|Tailong He (Toronto)<br>Dylan Jones (Toronto)<br>Andrea Molod (NASA GMAO)
−
|Structural
+
|Convection
 
|
 
|
−
*GCST has implemented many existing SOA diagnostics in netCDF
 
−
*GCST would need help from the community to streamline these diagnostics
 
  
 
|-valign="top"
 
|-valign="top"
−
|Calculation consistency throughout code: surface area, HGF (via species database)
+
|Update surface methane boundary condition using NOAA flask data
−
|GCST
+
|Lee Murray (Rochester)
−
|Structural
+
|Input data
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Harmonizing Henry's Law coefficients across wet and dry deposition
+
|Provide recommended rather than hard-coded scaling factors for online emissions
−
|[[GCST]]
+
|Melissa Sulprizio (Harvard)
−
|Science
+
|Emissions
 
|
 
|
−
*Work not started yet. Will need input from the community.
 
  
−
|-
+
|-valign="top"
−
!colspan="4" bgcolor="#CCFFFF"|Expansion of model capabilities
+
|High-res top-down TROPOMI-derived seasonal mean NOx emissions for China
 +
|Jintai Lin (PKU)
 +
|Emissions
 +
|Horizontal resolution: 5km, temporal resolution: JJA mean (monthly data will be available at a later stage; please contact us).
  
 
|-valign="top"
 
|-valign="top"
−
|CESM-GC offline coupling in standard model + benchmark
+
|Updated biomass burning emission factors and species
−
|Rokjin Park (SNU)<br>Daniel Rothenberg (MIT)
+
|Tess Carter (MIT)
−
|Science
+
|Emissions
 
|
 
|
−
*Rokjin Park says code is ready
 
−
*Waiting on clarification in which version this is implemented in.
 
  
−
|}
+
|-valign="top"
 +
|Updated offline sea salt emissions
 +
|Hongjian Weng (PKU) <br> Jintai Lin (PKU)
 +
|Emissions
 +
|
  
−
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 19:16, 23 May 2018 (UTC)
+
|-valign="top"
−
 
+
|HgII deposition too high in 13.4; Hg0 conc too low; should not use as is
−
=== Over the horizon (6-12 months) ===
+
|Viral Shah (NASA GMAO)<br>Yanxu Zhang (Nanjing U.)<br>Ari Feinberg (MIT)
−
 
+
|Hg simulation
−
{| border=1 cellspacing=0 cellpadding=5
+
|
−
|- bgcolor="#cccccc"
+
−
!width="400px"|Item
+
−
!width="250px"|Author(s)
+
−
!width="100px"|Type
+
−
!width="300px"|Status
+
  
 
|-valign="top"
 
|-valign="top"
−
|Land cover module: Harmonized biosphere-atmosphere exchange and implementing CLM or manual land cover change experiments
+
|[https://gmd.copernicus.org/articles/13/2569/2020/ Canopy Physics Model]
−
|Jeff Geddes (BU)
+
|Sam Silva (MIT)
−
|Science
+
|Emissions &<br>Science
 
|
 
|
−
*Has been added into v9-02 (pre-HEMCO)
+
*DOI: [https://zenodo.org/record/3614062#.XzvrH5NKjOR 10.5281/zenodo.3614062]
−
*Bringing this up to v11 will probably need significant effort
+
*Needs to be updated to a more recent GEOS-Chem version
−
*BU group/GCST will meet summer/fall 2018 to discuss implementation
+
  
 
|-valign="top"
 
|-valign="top"
−
|[http://www.atmos-chem-phys.net/16/2819/2016/ A snow NOx source from deep snowpack]
+
|Gridded EPA (GEPA) version 2 emissions for 2012-2018
−
|Maria Zatko (UW)<br>Becky Alexander (UW)
+
|Bram Maasakkers (SRON)<br>Erin McDuffie (WashU),<br>Melissa Sulprizio (Harvard)
−
|Science
+
|Emissions<br>CH4 simulation
 
|
 
|
−
*Delivered to GCST (Nov 2017)
 
−
*Needs to be added as a HEMCO extension, but converting from ancient v9-01-01 code may take significant effort.
 
  
 
|-valign="top"
 
|-valign="top"
−
|MEIC emissions over China (2000-2015)
+
|Reduce dimension of analytical inversion
−
|Lu Shen (Harvard)<br>Melissa Sulprizio (Harvard)
+
|Hannah Nesser (Harvard)
−
|Science
+
|Adjoint capability
 
|
 
|
−
*Defer until MEIC paper is published
 
  
 
|-valign="top"
 
|-valign="top"
−
|GISS-GC (ICECAP/GCAP2) in standard model + benchmark
+
|Retire all BPCH diagnostics
−
|Lee Murray (Rochester)<br>Eric Leibensperger (SUNY Plattsburgh)
+
|Bob Yantosca (Harvard)
−
|Science
+
|Diagnostics
−
|Lee Murray replied:
+
|
−
*"I would say 6-12 months to be safe, but the goal is to have it done by the end of summer 2018.  There will actually be very minimal updates to GEOS-Chem; most of the updates are to modify the GISS model to output MERRA2-like data, to facilitate integration with GCHP and future updates to the CTM."
+
  
 
|-valign="top"
 
|-valign="top"
−
|GISS-GC GCHP
+
|GEOS-Chem in CESM 2.3
−
|Lee Murray (Rochester)<br>Pengfei Liu (Harvard)<br>Yang Li (Harvard)
+
|Lizzie Lundgren (Harvard)
−
|Science
+
|Interfacing with ESMs
 
|
 
|
−
*Rochester and Harvard groups are coordinating, to avoid duplication of effort
 
  
 
|-valign="top"
 
|-valign="top"
−
|CESM-GC GCHP
+
|Assess memory leak in GCHP
−
|Seb Eastham (MIT)
+
|Killian Murphy (York)
−
|Science
+
|Model performance
 
|
 
|
−
*Seb Eastham is now the lead developer.
 
−
*Estimate late 2018 or early 2019; validation will take time
 
  
 
|-valign="top"
 
|-valign="top"
−
|Additional modifications for [[FlexChem]], including:
+
|Point to internal state for species mixing ratios in GCHP and GEOS
−
*Rebuild the pre-built chemistry mechanisms (Standard, Tropchem, SOA-SVPOA) with [http://www.paratools.com/Kppa Kppa]
+
|Lizzie Lundgren (Harvard)<br>Christoph Keller (NASA)
−
*Add capability for custom chemistry mechanism by building KPP on-the-fly in GEOS-Chem
+
−
|[[GCST]]
+
 
|Structural
 
|Structural
 
|
 
|
−
*Mike Long, who was the principal proponent behind these updates, has since left the GC community.
 
−
*We are not sure who will take this over
 
  
 
|-valign="top"
 
|-valign="top"
−
|Dynamic fire modeling/prediction
+
|Assess precision in GCHP internal state - use R4 for some?
−
|Shiliang Wu (MNT)
+
|Lizzie Lundgren (Harvard)
−
|Science
+
|Structural
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Interannually varying ocean model BCs for Hg from ocean model
+
|Hybrid MPI-OpenMP in GCHP
−
|Colin Thackray (Harvard)
+
|Seb Eastham (MIT)<br>Killian Murphy (York)
−
|Science
+
|Model performance
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|PAH & PFCA simulations
+
|Convert HEMCO input files to YAML
−
|Peter Ivatt (York)<br>Mat Evans (York)<br>Noelle Selin (MIT)<br>Colin Thackray (Harvard)
+
|Melissa Sulprizio (Harvard)
−
|Science
+
|Structural
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|CH4 in full chemistry simulation
+
|Allow easy disabling of HEMCO emissions for testing
−
|Seb Eastham (Harvard)
+
|Melissa Sulprizio (Harvard)
−
|Science
+
|Structural
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Standard future land use maps (PFT, LAI) for RCP/CMIP6 simulations
+
|Improve run directory templating and creation with init_rd.sh and shared directories
−
|Colette Heald (MIT)<br>Loretta Mickley (Harvard)
+
|Jourdan He (WashU)
−
|Science
+
|Run directories
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Archive GISS met fields from CMIP6 scenarios for community
+
|Table of CTM and online GCM properties: GCHP, GCC, GEOS-CTM, GC-Nested, online GEOS, GEOS-replay, etc
−
|Lee Murray (Rochester)
+
|GCST?
−
|Science
+
|Documentation
 
|
 
|
  
−
|-valign="top"
+
|-valign="top"<
−
|Updates to cold-temperature deposition
+
|Upgrade Fast-JX to Cloud-J
−
|Lyatt Jaegle (UW)
+
|Lizzie Lundgren (Harvard)
−
|Science
+
|Structural
 
|
 
|
 +
 +
|}
 +
 +
== 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"
−
|Simple parameterization for CO2-O3 dependence of stomatal resistance
+
|Snow / Icy Bromine
−
|Amos Tai (CUHK)
+
|Becky Alexander (UW)<br>William Swanson (U. Alaska)<br>Shuting Zhai (UW)
−
|Science
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|NH3 emissions over China
+
|Monoterpene oxidation scheme
−
|Lin Zhang (PKU)
+
|Jessica Haskins (MIT)
−
|Science
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Using GEOS-Chem within GEOS-5
+
|Fire related VOCs including furans
−
|Loretta Mickley (Harvard)
+
|Lu Hu (UMT)<br>Lixu Jin (UMT)
−
|Science
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Carbon cycle outputs in xCO2, xCH4 as a diagnostic
+
|Extension of UCX into the mesosphere
−
|Beata Bukosa (Wollongong)<br>Dylan Jones (UofT)
+
|Seb Eastham (MIT)<br>Eric Fleming (NASA)
−
|Science
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Seasonal EMEP emissions back to 1980
+
|Methane flux ingestion
−
|Mat Evans (York)
+
|Eloise Marais (UCL)
−
|Science
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Updates to NO2 dry deposition
+
|Parameterized effective radius
−
|Brian Boys (Dalhousie)
+
|Haihui Zhu (WashU)
−
|Science
+
|Aerosols
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|APM update and integration with most recent GEOS-Chem version
+
|Dust non-sphericity impacts on surface chem and optical properties
−
|Gan Luo (SUNY Albany)
+
|Inderjeet Singh (WashU)
−
|Structural
+
|Aerosols
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Cosmogenic tracer production
+
|Size-resolved stratospheric aerosol
−
|Lee Murray (Rochester)
+
|Seb Eastham (MIT)
−
|Science
+
|Aerosols
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Explore resolution-consistent dust emissions
+
|Extend aerosol settling
−
*Make high-res concentrations or mass fluxes available offline, implement in met field processing
+
|Eloise Marais (UCL)
−
|David Ridley (MIT)<br>GCST<br>Nested Model WG
+
|Aerosols
−
|Science
+
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Dust emissions at nested-grid resolutions
+
|Stratospheric aerosol APM
−
|Yuxuan Wang (U. Houston)<br>Jun Wang (U. Iowa)
+
|Fangqun Yu (SUNY)
−
|Science
+
|Aerosols
 
|
 
|
−
*Check for overlap with resolution-consistent dust emissions above
 
  
 
|-valign="top"
 
|-valign="top"
−
|[[Wet_deposition#Update_SO2_scavenging_in_convective_updrafts_for_consistency|Update SO2 scavenging in convective updrafts for consistency]]
+
|Plume-in-grid model
−
|Duncan Fairlie (NASA/LARC)  
+
|Hongwei Sun (Harvard)
−
|Science
+
|Chemistry
 
|
 
|
−
 
−
|}
 
−
 
−
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 19:42, 24 May 2018 (UTC)
 
−
 
−
=== Longer term (12-24 months)===
 
−
 
−
{| border=1 cellspacing=0 cellpadding=5
 
−
|- bgcolor="#cccccc"
 
−
!width="400px"|Item
 
−
!width="250px"|Author(s)
 
−
!width="100px"|Type
 
−
!width="300px"|Status
 
  
 
|-valign="top"
 
|-valign="top"
−
|GCHP stretched grid
+
|Updated lightning NOx: Prescribe from ground and geostationary lightning flashes
−
|Jiawei Zhuang (Harvard)
+
|Lee Murray (Rochester)
−
|Science
+
|Emissions
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|1/8 degree nested-grid simulations with GEOS-FP
+
|Seb aircraft emissions beyond recent 2019 update
−
|Nested Model WG
+
|Seb Eastham (MIT)
−
|Science
+
|Emissions
 
|
 
|
−
*Wait for more interest
 
  
 
|-valign="top"
 
|-valign="top"
−
|Embedding GEOS-Chem into CESM
+
|FRP-based fire emsisions for eastern US at 0.2 deg
−
|Jean-Francois Lamarque (NCAR)
+
|Charlie Fite (FSU)
−
|Science
+
|Emissions
 
|
 
|
−
*NOTE: Seb Eastham is already working on this
 
  
 
|-valign="top"
 
|-valign="top"
−
|Adjoint of carbon cycle simulation in GCHP
+
|Hg iodine chemistry
−
|Kevin Bowman (JPL)
+
|Yiming Fu<br>Yanxu Zhang (Nanjing U.)
−
|Science
+
|Hg simulation
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Isoprene chemistry v2 (new Caltech update)
+
|Hg simulation in GCHP
−
|Kelvin Bates (Caltech)
+
|Ari Feinberg (MIT)<br>Lyssa Freese (MIT)
−
|Science
+
|Hg simulation
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Contemporary land cover: developing historical and updated GEOS-Chem land cover maps based on satellite remote sensing
+
|Update Hg ocean and soil boundary conditions for consistency with new chemistry
−
|Jeff Geddes (BU)
+
|Yanxu Zhang (Nanjing U.)
−
|Science
+
|Hg simulation
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Farquhar-Ball-Barry model to calculate stomatal resistance
+
|Dry deposition diagnostics by land cover
−
|Amos Tai (CUHK)<br>Jeff Geddes (BU)
+
|Holly Nowell (FSU)
−
|Science
+
|Diagnostics
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Impacts of chemistry on ecosystem/carbon cycle
+
|Dry deposition process diagnostics
−
|Kevin Bowman (JPL)<br>Anthony Bloom (JPL)
+
|Holly Nowell (FSU)
−
|Science
+
|Diagnostics
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Improved lightning emission scheme
+
|Isotope simulation for CO and CH4 in GCHP
 
|Lee Murray (Rochester)
 
|Lee Murray (Rochester)
−
|Science
+
|Carbon simulation
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Resolution-independent lightning NOx
+
|Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3)
−
|Lee Murray (Rochester)
+
|Melissa Sulprizio (Harvard)<br>Tia Scarpelli (U. Edinburgh)<br>Zichong Chen (Harvard)
−
|Science
+
|Emissions<br>CH4 simulation
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Bidirectional NH3 emissions
+
|Separate mixing and emissions
−
|Juliet Zhu (CSU)
+
|Bob Yantosca (Harvard)
−
|Science
+
|Structural
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Country-based weekday/weekend variability for EDGAR 4.2
+
|Modularization of aerosols code for interface with GOCART in GEOS
−
|Lee Murray (Rochester)<br>Christoph Keller (Harvard)
+
|Christoph Keller (GMAO)
−
|Science
+
|Structural
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Update keytone photolysis
+
|Migrating simple SOA formation from carbon_mod.F90 into the KPP "full-chemistry" mechanism
−
|Jared Brewer (CSU)<br>Emily Fischer (CSU)
+
|Bob Yantosca (Harvard)
−
|Science
+
|Structural
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Small alkyl nitrates
+
|Improve load balancing in GCHP
−
|Jenny Fisher (Wollongong)
+
|Seb Eastham (MIT)
−
|Science
+
|Model performance
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|YIBS-GC chemistry-biosphere-fire coupling
+
|Update to MAPL 3 in GCHP, including replacement of ExtData.rc with YAML file
−
|Loretta Mickley (Harvard)<br>Xu Yue (IAP)
+
|Lizzie Lundgren (Harvard)
−
|Science
+
|Structural
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Nitrogen-LAI coupling
+
|Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone
−
|Lin Zhang (PKU)<br>Amos Tai (CUHK)
+
|Bob Yantosca (Harvard)
−
|Science
+
|Model performance
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Implementing humidity/VPD dependence of dry deposition
+
|Limit allocation of State_Met to what is needed per simulation
−
|Jennifer Murphy (U. Toronto)
+
|Melissa Sulprizio (Harvard)
−
|Science
+
|Structural
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|SO2 wet scavenging
+
|Make frequency of HEMCO restart file configurable
−
|Duncan Fairlie (NASA Langley)
+
|Melissa Sulprizio (Harvard)
−
|Science
+
|Diagnostics
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Heterogeneous sulfate production
+
|Apply masks/scaling in HEMCO based on input category or flag
−
|Lin Zhang (PKU)<br>Becky Alexander (UW)<br>Yuxuan Wang (U. Houston)
+
|Melissa Sulprizio (Harvard)
−
|Science
+
|Structural
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|MOSAIC implementation
+
|Testing the use of monthly mean MERRA-2 CWC with Pb-210 aerosol tracer
−
|Sebastian Eastham (Harvard)
+
|Bo Zhang (NIA)<br>Hongyu Liu (NIA / NASA Langley)
−
|Science
+
|Transport
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Particle size climatology
+
|Testing the use of a new scavenging parameterization developed by Luo and Yu for cold cloud with Pb-210 aerosol tracer
−
|Fangqun Yu (SUNY Albany)
+
|Gan Luo (SUNY Albany)<br>Fangqun Yu (SUNY-Albany)
−
|Science
+
|Transport
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Sea salt/dust size distribution
+
|Evaluate vertical mixing in GEOS-Chem with model-model and model-observation comparisons
−
|David Ridley (MIT)<br>Colette Heald (MIT)
+
|Seb Eastham (MIT)<br>Clara Orbe (NASA GISS)<br>Andrew Schuh (CSU)
−
|Science
+
|Transport
 
|
 
|
 +
 +
|}
 +
 +
== 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
 +
|- bgcolor="#cccccc"
 +
!width="200px"|Feature
 +
!width="200px"|Contributor(s)
 +
!width="100px"|Model scope
 +
!width="420px"|Notes and References
 +
  
 
|-valign="top"
 
|-valign="top"
−
|Updates to GTMM
+
|[https://github.com/geoschem/geos-chem/issues/1288 New soil NOx parameterization]
−
|Rebecca Stern (Harvard)
+
|Yi Wang (U. Iowa)<br>Jun Wang (U. Iowa)
−
|Science
+
|Emissions
 
|
 
|
 +
*See [https://github.com/geoschem/geos-chem/issues/1288 geoschem/geos-chem #1288]
 +
*[https://github.com/geoschem/geos-chem/issues/1288#issuecomment-1255103962 NOTE: This feature has been tabled for the time being.]
  
 
|-valign="top"
 
|-valign="top"
−
|Tracer transport ocean
+
|Updates to Aromatic chemistry
−
|Chris Holmes (FSU)
+
|Stephen MacFarlane (UOW)<br>Jenny Fisher (UOW)
−
|Science
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Include Hg in full chemistry simulation
+
|Nitrate photolysis
−
|Noelle Selin (MIT)
+
|Mat Evans (York)<br>Thomas Sherwen (York)<br>Matthew Rowlinson (York)
−
|Science
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Goddard seasonal weather prediction in GCHP
+
|In aerosol chemistry Halogens
−
|Kevin Bowman (JPL)
+
|Mat Evans (York)<br>Hansen Cao (CU Boulder)
−
|Science
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Climate index diagnostics (drought, etc.)
+
|Benchmark box model of GC Chemistry
−
|Chemistry-ecosystems-climate WG
+
|Katie Travis (NASA)
−
|Structural
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Joint CO/CO2/CH4 simulation
+
|Alkyl nitrates Alk7, PHAN
−
|Nicholas Deutscher (U. Wollongong)
+
|Katie Travis (NASA)
−
|Science
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Carbon coupling: oceans and terrestrial models
+
|Add stratospheric ozone species to full-chemistry simulations
−
|Chris Holmes (FSU)
+
|Lee Murray (Rochester)
−
|Science
+
|Chemistry
 
|
 
|
−
*Ocim-pure physical transport, ECCO-Darwin ocean biogeochemistry
 
  
 
|-valign="top"
 
|-valign="top"
−
|DMS oxidation scheme updating
+
|Perchlorate chemistry
−
|Qianjie Chen (UW)<br>Chemistry WG
+
|Yuk Chun Chan (UWAB)
−
|Science
+
|Chemistry
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Limiting NH3 uptake due to OA
+
|Explicit heterogeneous sulfate chemistry
−
|Rachel Silvern (Harvard)
+
|Katie Travis (NASA)<br>Becky Alexander (UT)
−
|Science
+
|Chemistry
 
|
 
|
  
−
|}
+
|-valign="top"
 +
|ISORROPIA-lite
 +
|Becky Alexander (UW)
 +
|Aerosols
 +
|
  
−
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 15:32, 23 May 2018 (UTC)
+
|-valign="top"
 +
|HOx and ozone "emissions" from lightning as option in model to play with
 +
|Jingqiu (Alaska)<br>Lee Murray (Rochester)
 +
|Emissions
 +
|
  
−
=== Currently not prioritized ===
+
|-valign="top"
 +
|Sea salt aerosol from sea ice leads
 +
|Hannah Horowitz (U. Illinois)
 +
|Emissions
 +
|
  
−
{| border=1 cellspacing=0 cellpadding=5
+
|-valign="top"
−
|- bgcolor="#cccccc"
+
|Drought-stress algorithm
−
!width="400px"|Item
+
|Wei Li (U. Houston)
−
!width="250px"|Author(s)
+
|
−
!width="100px"|Type
+
|
−
!width="300px"|Status
+
  
 
|-valign="top"
 
|-valign="top"
−
|[[GEOS-Chem_species_units|Uniformity of units]]
+
|Biomass burning injection height profiles
−
|[[GCST]]
+
|Inderjeet Singh (WashU)
−
|Structural
+
|Emissions
−
|Lizzie Lundgren wrote:
+
|
−
*We are not planning on resuming work to unify units in GEOS-Chem anytime soon. Any changes to units in the near future would be for better compatibility with other models, although none are currently planned. However, user consensus on preferred units would still be helpful to move the conversation forward.
+
  
 
|-valign="top"
 
|-valign="top"
−
|Sea salt emission from sea ice
+
|OCIM integration
−
|Jiayue Huang (UW)
+
|Chris Holmes (FSU)<br>Lee Murray (Rochester)
−
|Science
+
|
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Re-evaluation of SST dependence of sea salt emissions
+
|Updating landcover products in GEOS-Chem
−
|Jiayue Huang (UW)
+
|Chris Holmes (FSU)<br>Jeff Geddes (BU)
−
|Science
+
|Input data
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|[[MEGAN_v2.1_plus_Guenther_2012_biogenic_emissions#Discussion_of_LAI_Data_Sources|Update MODIS LAI fields through 2015]]
+
|Dry deposition physical improvement
−
|Barron Henderson (UF)
+
|Chris Holmes (FSU)
−
|Science
+
|Dry deposition
 
|
 
|
  
 
|-valign="top"
 
|-valign="top"
−
|Lightning NOx chemistry parameterization
+
|Extend the IMI system to other trace gases
−
|Alicia Gressent (MIT)
+
|Lucas Estrada (Harvard)
−
|Science
+
|Adjoint capabilities
 +
|
 +
 
 +
 
 +
|-valign="top"
 +
|TOMAS WRF-GC in regional Thailand simulation
 +
|Win Trivitayanurak (Chulalongkorn U)
 +
|Aerosols
 
|
 
|
  
 
|}
 
|}
  
−
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 20:54, 23 May 2018 (UTC)
+
----------------
 +
 
 +
'''''[[Main_Page|GEOS-Chem Main Page]] | [[GCHP_Main_Page|GCHP Main Page]]'''''

Revision as of 18:24, 22 September 2022

GEOS-Chem 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 Working Groups and the Steering Committee. For history of past releases see the GEOS-Chem Versions wiki page.

Release schedule

Please see the GEOS-Chem Release Proposal outlining the procedure and schedule for releasing GEOS-Chem versions.

Merged and awaiting release

See the links below for items merged and awaiting release.

Patch version in development Major version in development
- GEOS-Chem 14.0.0

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


TOMAS in GCHP Betty Croft (WashU) Aerosols Simple
Adaptive chemical solver (as option) / KPP 3.0.0 Mike Long (Harvard)
Haipeng Lin (Harvard)
Bob Yantosca (GCST)
Lu Shen (PKU) 		Chemistry Complicated
  • Lin, H., M.S. Long, R. Sander, R.M. Yantosca, L.A. Estrada, L. Shen, and D.J. Jacob, An adaptive auto-reduction solver for speeding up integration of chemical kinetics in atmospheric chemistry models: implementation and evaluation in the Kinetic Pre-Processor (KPP) version 3.0.0, submitted to JAMES, https://doi.org/10.31223/X5505V, 2022.
Joint CO2-CO-CH4-OCS simulation via KPP Beata Bukosa (NIWA)
Kevin Bowman (JPL)
Mike Long (Harvard) 		Specialty simulation Medium
RO2 diagnostic Melissa Sulprizio (Harvard) Diagnostics Simple
Output satellite diagnostics as NetCDF Eloise Marais (UCL) Diagnostics Simple
Provide climatologies for open fire emissions Melissa Sulprizio (Harvard) Emissions Simple
Climatologies for lightning NOx Lee Murray (Rochester) Emissions Simple
Add new species concentration diagnostic in units of molec/cm3 Haipeng Lin (Harvard) Diagnostics Simple
Identify and remove memory leaks and similar issues Bob Yantosca (Harvard) Structural Medium
Update transport tracer simulation for consistency with the tracer gridded component in GEOS Melissa Sulprizio (Harvard) TransportTracer simulation Simple
Bug fix for GFAS in GCHP Lizzie Lundgren (Harvard) GCHP Simple
Use pointers to internal state for species arrays in GCHP/GEOS Lizzie Lundgren (Harvard) GCHP/GEOS Medium
Revision to a rate constant for the C2H4 scheme Kelvin Bates (Harvard) Chemistry Easy
Fix product in HOBr/Cl + S(IV) reactions Xuan Wang (CUHK) Chemistry Easy
Add MO2 + NO3 reaction Kelvin Bates (Harvard) Chemistry Easy

Delivered and in the queue

Features listed in this table have been delivered to the GEOS-Chem Support Team and are prioritized to be integrated into GEOS-Chem in the near future.

Feature Contributor(s) Model scope Ease of implementation Notes and References
AMAP 2015 emissions from GMA2018 Helene Angot(MIT)
Ari Feinberg (MIT)
Noelle Selin (MIT) 		Hg simulation Simple
  • Delivered to GCST (Jul 2022)
Improvements in modelled Hg0 dry deposition to land Ari Feinberg (MIT)
Noelle Selin (MIT)
Thandolwethu Dlamini (MIT)
Martin Jiskra (UBasel)
Viral Shah (Harvard) 		Hg simulation Simple
  • See geoschem/geos-chem PR #1367
  • The study is already published and could be incorporated into the standard model as a default. Some tweaking to the reduction rate may be required as the model halogen oxidation has also been updated in v13.4.
HTAPv3 at 0.1 deg Dandan Zhang (WashU) Emissions Simple
  • Delivered to GCST (Jul 2022)

Delivered but not yet prioritized

Features listed in this table have been delivered to the GEOS-Chem Support Team but are not yet prioritized for integration into GEOS-Chem.

Feature Contributor(s) Model scope Ease of implementation Notes and References
Tagged O3 simulation in GCHP Xingpei Yu (PKU)
Jourdan He (WashU) 		TagO3 simulation Simple
Global continental chlorine (pCl and HCl) emissions Bingqing Zhang (Georgia Tech)
Pengfei Liu (Georgia Tech) 		Emissions Simple
  • Delivered to GCST (Jul 2022)
Ecophysiology module in GEOS-Chem for biosphere-atmosphere exchange Joey Lam(CUHK)
Amos Tai (CUHK) 		Science Simple
LPJ land cover (global), fire (W US), dust emissions (SW N America), 1700-2100 Yang Li (Baylor University)
Loretta Mickley (Harvard) 		Emissions Simple
  • Data files delivered to GCST (July 2021)
  • Data are quite large - need to think about storage, compression
Stratospheric HCN chemistry Armin Kleinbohl (JPL)
Debra Weisenstein (Harvard, retired) 		Chemistry Medium
  • Delivered to GCST (Jun 2020)

Ready but not delivered

Features listed in this table are ready but have not been delivered to the GEOS-Chem Support Team.

Feature Contributor(s) Model scope Notes and References
Updating VOC fire emissions and adding lumped furan Colette Heald (MIT)
Jessica Haskins (MIT) 		Chemistry
  • Carter, T. S., Heald, C. L., Kroll, J. H., Apel, E. C., Blake, D., Coggon, M., Edtbauer, A., Gkatzelis, G., Hornbrook, R. S., Peischl, J., Pfannerstill, E. Y., Piel, F., Reijrink, N. G., Ringsdorf, A., Warneke, C., Williams, J., Wisthaler, A., and Xu, L.: An Improved Representation of Fire Non-Methane Organic Gases (NMOGs) in Models: Emissions to Reactivity, Atmos. Chem. Phys. Discuss. [preprint], https://doi.org/10.5194/acp-2022-438, in review, 2022.
Nitrate photolysis Viral Shah (NASA GMAO) Chemistry
  • Shah, V., D.J. Jacob, R. Dang, L.N. Lamsal, S.A. Strode, S.D. Steenrod, K.F. Boersma, S.D. Eastham, T.M. Fritz, C. Thompson, J. Peischl, I. Bourgeois, I.B. Pollack, B.A. Nault, R.C. Cohen, P. Campuzano-Jost, J.L. Jimenez, S.T. Andersen, L.J. Carpenter, T. Sherwen, and M.J. Evans, Nitrogen oxides in the free troposphere: Implications for tropospheric oxidants and the interpretation of satellite NO2 measurements, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2022-656, 2022.
Online H2 chemistry Maria Paula Pérez-Peña (UNSW)
Jenny Fisher (UOW)
Dylan Millet (UMN) 		Chemistry
Alk4 & R4N2 chemistry Jared Brewer (Harvard) Chemistry
  • Brewer, J.F., D.J. Jacob, S.H. Jathar, Y. He, A. Akherati, S. Zhai, D.S. Jo, A. Hodzic, B.A. Nault, P. Campuzano-Jost, J.L. Jimenez, R.J. Park, Y.J. Oak, and H. Liao, A scheme for representing aromatic secondary organic aerosols in chemical transport models: application to source attribution of organic aerosols over South Korea during the KORUS-AQ campaign, submitted to J. Geophys. Res., 2022.
Organic acids (RCOOH) Katie Travis (NASA) Chemistry
Update reactions with new JPL & IUPAC recommendations Kelvin Bates (Harvard) Chemistry
  • Currently running simulations to check magnitude of changes
Improve carbon & nitrogen conservation in reactions Kelvin Bates (Harvard) Chemistry
Blowing snow sea salt in TOMAS Betty Croft (Dalhousie) Aerosols
Geologic emission of ethane and propane Matthew Rowlinson and Mat Evans(York) Emissions
New version of CEDS at 0.1 deg Emma Knowland (NASA) Emissions
MEIC (China regional) for 2000-2017 at 0.5x0.625 deg Shixian Zhai (Harvard) Emissions
  • Need permission from Qiang Zhang (Tsinghua U.) to distribute data
KORUS-AQ emissions for East Asia Katie Travis (NASA) Emissions
  • Need permission to distribute data
Australian anthropogenic Hg emissions Stephen MacFarlane (UOW)
Jenny Fisher (UOW)
Hannah Horowitz (U. Illinois)
Viral Shah (Harvard) 		Hg simulation
WRF-GC Hg simulation Xiaotian Xu (Nanjing U.)
Yanxu Zhang (Nanjing U.) 		Hg simulation
WRF-GC
Updated HgII gas-partical partitioning Kaiyun Liu (Tsinghua U.)
Qingru Wu (Tsinghua U.)
Shuxiao Wang (Tsinghua U.) 		Hg simulation
  • Should be option, not default
Dry deposition to F90 (readability) Chris Holmes (FSU) Dry deposition

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


DMS Chemistry Linia Tashmim (UC Riverside)
William Porter (UC Riverside) 		Chemistry
PPN+hv, PPN+OH Robert Ryan (UCL) Chemistry
MBO Michael Vermeuel (UMN) Chemistry
Stratospheric adjustment with RRTMG in GEOS-Chem Seb Eastham (MIT) Science
Re-binning of off-line sea salt and dust for use in TOMAS Betty Croft (Dalhousie) Aerosols
Adaption of TOMAS' in-cloud aqueous sulfate production for KPP versus sulfate_mod.F90 Betty Croft (Dalhousie) Aerosols
ML algorithms for bulk aerosols Arshad Nair (SUNY Albany)
Fangqun Yu (SUNY Albany) 		Aerosols
PM2.5 and PM10 calculations: aerodynamic vs geometric diameters Shixian Zhai (Harvard) Aerosols
Updates to Hodzic SOA scheme Jared Brewer (Harvard) Aerosols
Automated reduction in isoprene scheme Dan Westervelt (Lamont-Doherty) Aerosols
Brown carbon chemsitry Jingqiu Mao (U. Alaska)
Xuan Wang (CUHK) 		Aerosols


GEOS resolution and subgrid convection - Part 2 RAS parameter tuning Tailong He (Toronto)
Dylan Jones (Toronto)
Andrea Molod (NASA GMAO) 		Convection
Update surface methane boundary condition using NOAA flask data Lee Murray (Rochester) Input data
Provide recommended rather than hard-coded scaling factors for online emissions Melissa Sulprizio (Harvard) Emissions
High-res top-down TROPOMI-derived seasonal mean NOx emissions for China Jintai Lin (PKU) Emissions Horizontal resolution: 5km, temporal resolution: JJA mean (monthly data will be available at a later stage; please contact us).
Updated biomass burning emission factors and species Tess Carter (MIT) Emissions
Updated offline sea salt emissions Hongjian Weng (PKU)
Jintai Lin (PKU) 		Emissions
HgII deposition too high in 13.4; Hg0 conc too low; should not use as is Viral Shah (NASA GMAO)
Yanxu Zhang (Nanjing U.)
Ari Feinberg (MIT) 		Hg simulation
Canopy Physics Model Sam Silva (MIT) Emissions &
Science
Gridded EPA (GEPA) version 2 emissions for 2012-2018 Bram Maasakkers (SRON)
Erin McDuffie (WashU),
Melissa Sulprizio (Harvard) 		Emissions
CH4 simulation
Reduce dimension of analytical inversion Hannah Nesser (Harvard) Adjoint capability
Retire all BPCH diagnostics Bob Yantosca (Harvard) Diagnostics
GEOS-Chem in CESM 2.3 Lizzie Lundgren (Harvard) Interfacing with ESMs
Assess memory leak in GCHP Killian Murphy (York) Model performance
Point to internal state for species mixing ratios in GCHP and GEOS Lizzie Lundgren (Harvard)
Christoph Keller (NASA) 		Structural
Assess precision in GCHP internal state - use R4 for some? Lizzie Lundgren (Harvard) Structural
Hybrid MPI-OpenMP in GCHP Seb Eastham (MIT)
Killian Murphy (York) 		Model performance
Convert HEMCO input files to YAML Melissa Sulprizio (Harvard) Structural
Allow easy disabling of HEMCO emissions for testing Melissa Sulprizio (Harvard) Structural
Improve run directory templating and creation with init_rd.sh and shared directories Jourdan He (WashU) Run directories
Table of CTM and online GCM properties: GCHP, GCC, GEOS-CTM, GC-Nested, online GEOS, GEOS-replay, etc GCST? Documentation
Upgrade Fast-JX to Cloud-J Lizzie Lundgren (Harvard) Structural

Over the horizon (6-12 months)

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

Feature Contributor(s) Model scope Notes and References
Snow / Icy Bromine Becky Alexander (UW)
William Swanson (U. Alaska)
Shuting Zhai (UW) 		Chemistry
Monoterpene oxidation scheme Jessica Haskins (MIT) Chemistry
Fire related VOCs including furans Lu Hu (UMT)
Lixu Jin (UMT) 		Chemistry
Extension of UCX into the mesosphere Seb Eastham (MIT)
Eric Fleming (NASA) 		Chemistry
Methane flux ingestion Eloise Marais (UCL) Chemistry
Parameterized effective radius Haihui Zhu (WashU) Aerosols
Dust non-sphericity impacts on surface chem and optical properties Inderjeet Singh (WashU) Aerosols
Size-resolved stratospheric aerosol Seb Eastham (MIT) Aerosols
Extend aerosol settling Eloise Marais (UCL) Aerosols
Stratospheric aerosol APM Fangqun Yu (SUNY) Aerosols
Plume-in-grid model Hongwei Sun (Harvard) Chemistry
Updated lightning NOx: Prescribe from ground and geostationary lightning flashes Lee Murray (Rochester) Emissions
Seb aircraft emissions beyond recent 2019 update Seb Eastham (MIT) Emissions
FRP-based fire emsisions for eastern US at 0.2 deg Charlie Fite (FSU) Emissions
Hg iodine chemistry Yiming Fu
Yanxu Zhang (Nanjing U.) 		Hg simulation
Hg simulation in GCHP Ari Feinberg (MIT)
Lyssa Freese (MIT) 		Hg simulation
Update Hg ocean and soil boundary conditions for consistency with new chemistry Yanxu Zhang (Nanjing U.) Hg simulation
Dry deposition diagnostics by land cover Holly Nowell (FSU) Diagnostics
Dry deposition process diagnostics Holly Nowell (FSU) Diagnostics
Isotope simulation for CO and CH4 in GCHP Lee Murray (Rochester) Carbon simulation
Updated bottom-up global CH4 oil, gas, and coal emissions (GFEI v3) Melissa Sulprizio (Harvard)
Tia Scarpelli (U. Edinburgh)
Zichong Chen (Harvard) 		Emissions
CH4 simulation
Separate mixing and emissions Bob Yantosca (Harvard) Structural
Modularization of aerosols code for interface with GOCART in GEOS Christoph Keller (GMAO) Structural
Migrating simple SOA formation from carbon_mod.F90 into the KPP "full-chemistry" mechanism Bob Yantosca (Harvard) Structural
Improve load balancing in GCHP Seb Eastham (MIT) Model performance
Update to MAPL 3 in GCHP, including replacement of ExtData.rc with YAML file Lizzie Lundgren (Harvard) Structural
Assessment/improvement of OpenMP performance in GC-Classic and HEMCO standalone Bob Yantosca (Harvard) Model performance
Limit allocation of State_Met to what is needed per simulation Melissa Sulprizio (Harvard) Structural
Make frequency of HEMCO restart file configurable Melissa Sulprizio (Harvard) Diagnostics
Apply masks/scaling in HEMCO based on input category or flag Melissa Sulprizio (Harvard) Structural
Testing the use of monthly mean MERRA-2 CWC with Pb-210 aerosol tracer Bo Zhang (NIA)
Hongyu Liu (NIA / NASA Langley) 		Transport
Testing the use of a new scavenging parameterization developed by Luo and Yu for cold cloud with Pb-210 aerosol tracer Gan Luo (SUNY Albany)
Fangqun Yu (SUNY-Albany) 		Transport
Evaluate vertical mixing in GEOS-Chem with model-model and model-observation comparisons Seb Eastham (MIT)
Clara Orbe (NASA GISS)
Andrew Schuh (CSU) 		Transport

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


New soil NOx parameterization Yi Wang (U. Iowa)
Jun Wang (U. Iowa) 		Emissions
Updates to Aromatic chemistry Stephen MacFarlane (UOW)
Jenny Fisher (UOW) 		Chemistry
Nitrate photolysis Mat Evans (York)
Thomas Sherwen (York)
Matthew Rowlinson (York) 		Chemistry
In aerosol chemistry Halogens Mat Evans (York)
Hansen Cao (CU Boulder) 		Chemistry
Benchmark box model of GC Chemistry Katie Travis (NASA) Chemistry
Alkyl nitrates Alk7, PHAN Katie Travis (NASA) Chemistry
Add stratospheric ozone species to full-chemistry simulations Lee Murray (Rochester) Chemistry
Perchlorate chemistry Yuk Chun Chan (UWAB) Chemistry
Explicit heterogeneous sulfate chemistry Katie Travis (NASA)
Becky Alexander (UT) 		Chemistry
ISORROPIA-lite Becky Alexander (UW) Aerosols
HOx and ozone "emissions" from lightning as option in model to play with Jingqiu (Alaska)
Lee Murray (Rochester) 		Emissions
Sea salt aerosol from sea ice leads Hannah Horowitz (U. Illinois) Emissions
Drought-stress algorithm Wei Li (U. Houston)
Biomass burning injection height profiles Inderjeet Singh (WashU) Emissions
OCIM integration Chris Holmes (FSU)
Lee Murray (Rochester)
Updating landcover products in GEOS-Chem Chris Holmes (FSU)
Jeff Geddes (BU) 		Input data
Dry deposition physical improvement Chris Holmes (FSU) Dry deposition
Extend the IMI system to other trace gases Lucas Estrada (Harvard) Adjoint capabilities


TOMAS WRF-GC in regional Thailand simulation Win Trivitayanurak (Chulalongkorn U) Aerosols

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