GEOS-Chem model development priorities

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Revision as of 16:21, 16 May 2016 by Melissa Payer (Talk | contribs) (Ready to go in)

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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 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.

We also invite you to view our GEOS-Chem Support Team project management board on Trello.com, which shows the current GCST workflow.

List of priorities as of May 2015

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.

Awaiting release

Item Author(s) Status
Science updates
Correction for wet/dry pressure Lizzie Lundgren (Harvard)
Meemong Lee (JPL)
  • Included in v11-01a (approved 07 Jul 2015)
  • Update 30 July 2015: A moisture signature is observed in CO2 concentrations during carbon simulations with zero emissions and constant 370 ppm initial conditions. The moisture signature is expected for wet mixing ratio (v/v total air) but not dry mixing ratio (v/v dry air). This issue is currently under investigation.
Update DMS climatology to Lana Tom Breider (Harvard)
  • Included in v11-01b (approved 19 Aug 2015)
Impaction scavenging for hydrophobic BC Qiaoqiao Wang (Max Planck Institute)
  • Included in v11-01b (approved 19 Aug 2015)
Homogeneous IN removal Qiaoqiao Wang (Max Planck Institute)
  • Included in v11-01b (approved 19 Aug 2015)
Online emission of marine primary organic aerosol (POA) Brett Gantt (NCSU)
Matthew Johnson (NASA Ames)
  • Included in v11-01b (approved 19 Aug 2015)
Density of OA update Melanie Hammer (Dalhousie)
Eloïse Marais (Harvard)
  • Included in v11-01b (approved 19 Aug 2015)
Addition of BrC UV absorption to address impacts on OH Melanie Hammer (Dalhousie)
  • Included in v11-01b (approved 19 Aug 2015)
Acid uptake on dust aerosols T. Duncan Fairlie (NASA/LARC)
  • Included in v11-01b (approved 19 Aug 2015)
Improved dust size distribution scheme Li Zhang (Colorado U.)
Daven Henze (Colorado U.)
  • Included in v11-01b (approved 19 Aug 2015)
Updates to PAH code Carey Friedman (MIT)
  • Included in v11-01c (approved 14 Sep 2015)


Hg Ocean MLD bug fixes Amanda Giang (MIT)
  • Included in v11-01c (approved 14 Sep 2015)


Hg Ocean rate coefficients (as an option, not default) Shaojie Song (MIT)
  • Included in v11-01c (approved 14 Sep 2015)


Hg Arctic process updates Jenny Fisher (Wollongong)
  • Included in v11-01c (approved 14 Sep 2015)


Hg emission updates (NEI2011, NPRI2011, UNEP2010 with adjustments for in-plume reduction and emission controls) Yanxu Zhang (Harvard)
Amanda Giang (MIT)
  • Included in v11-01c (approved 14 Sep 2015)
CO2 direct effect on isoprene emissions Amos Tai (CUHK)
  • Included in v11-01d (approved 12 Dec 2015)
Criegee intermediates Dylan Millet (U. Minnesota)
Eloïse Marais (Harvard)
  • Included in v11-01d (approved 12 Dec 2015)
Developing a common data structure to contain Henry's law constants and other relevant parameters for each species

GEOS-Chem Support Team
Katie Travis (Harvard)

  • Introduced in v11-01d (approved 12 Dec 2015)
  • Modified in v11-01e (approved 04 Jan 2016)
Structural/programming updates
GEOS-Chem timers Matt Yannetti (GCST)
  • Included in v11-01c (approved 14 Sep 2015)
Adding support for MERRA-2 meteorology GEOS-Chem Support Team
  • Initial modifications for running with MERRA-2 were included in v11-01c, which was approved on 14 Sept 2015
  • Full integration of MERRA-2 in GEOS-Chem (i.e. making "full-chemistry" simulations compatible with MERRA-2) is slated for inclusion in v11-01f
    • Scale factors for lightning, dust, and other emissions will need to be recomputed based on 1-year (or longer) simulations.
Structural updates for GEOS-Chem HP GEOS-Chem Support Team
NASA/GMAO
  • This will be an ongoing process that will occur simultaneously as the above science updates are brought into GEOS-Chem.
Documentation
Update wiki documentation for GMAO met field products:
  • Naming convention used by GMAO
  • Version numbers corresponding to dates of met field data
GEOS-Chem Support Team
NASA/GMAO
  • In progress

--Melissa Sulprizio (talk) 15:51, 27 January 2016 (UTC)

Ready to go in

Item Author(s) Status
FlexChem Mike Long (Harvard)
PAN updates Emily Fischer (CSU)
  • Delivered to GCST (May 2013)
  • Slated for inclusion in v11-01h
Halogen chemistry updates Tomás Sherwen (York)
Johan Schmidt (Harvard)
Oxidants and Chemistry WG
Updating chemistry rate constants based on JPL Publication 15-10 Barron Henderson (U. Florida)
Mat Evans (U. York)
Monthly mean surface methane distributions Lee Murray (NASA GISS/LDEO)
Ocean ammonia emission inventory Fabien Paulot (NOAA/GFDL)
  • Delivered to GCST (Jan 2016)
  • Slated for inclusion in v11-01h
Temporary fix to remove SO2 scavenging in convective updrafts Duncan Fairlie (NASA/LARC)
  • Delivered to GCST (Nov 2015)
  • Slated for inclusion in v11-01h
Update density of BC to 1.8 and add absorption enhancement factor in input.geos Xuan Wang (MIT)
  • Delivered to GCST (Jan 2016)
  • Slated for inclusion in v11-01h
Sub-grid non-linear chemistry of NOx-O3 system related to lightning NOx emissions Alicia Gressent (MIT)
  • Slated for inclusion after FlexChem
Metal catalyzed oxidation of SO2 (as a switch) Becky Alexander (UW)
  • Slated for inclusion after FLEXCHEM
  • 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.
Fix to direct/diffuse radiation Katie Travis (Harvard)
Fix for NO3 + ISOP product Katie Travis (Harvard)
Update OH + NO2 rate Barron Henderson (UF)
Tagged sulfate and nitrate simulation Becky Alexander (UW)

--Melissa Sulprizio (talk) 15:51, 27 January 2016 (UTC)

Almost there (< 6 months)

Item Author(s) Status
Update MODIS LAI fields through 2015 Barron Henderson (UF)
Python GEOS-Chem output processing and visualization package Benoît Bovy (U. Liège-Belgium)
  • Users may download and test it and submit feedback to Benoit Bovy.
Benchmark of stratosphere simulation Dylan Jones (U. Toronto)
Benchmark for nested NA model Jun Wang (UNL)
High-resolution regional emissions (to be implemented via HEMCO) Lin Zhang (PKU)
Yuxuan Wang (Texas A&M)
Updates to isoprene chemistry, includes:
  • Fast photolysis of carbonyl nitrates
  • Aerosol uptake of organic nitrates
Jenny Fisher (U. Wollongong)
Eloïse Marais (Harvard)
Kelvin Bates (Caltech)
Katie Travis (Harvard)
  • This has already been added to the SEAC4RS research version of GEOS-Chem
3D chemical source for CO2 and CO; OH for tagged CO and CH4 simulations Dylan Jones (U. Toronto)
Hg code updates (emissions, chemistry, ocean, land) Hg and POPs Working Group


Lightning NOx plume chemistry Alicia Gressent (U. Paul Sabatier)
Nested CO2, CH4, Hg, TOMAS, adjoint, etc. Nested Model Working Group
Updated nighttime isoprene chemistry Rebecca Schwantes (Caltech)
Updated organic deposition Katie Travis (Harvard)
Jenny Fisher (U. Wollongong)
EPA-derived BC/OA emissions over US (1990-2012) David Ridley (MIT)
Observation operators for CO2 OCO-2 in GEOS-Chem Adjoint Kevin Bowman (JPL)
Dylan Jones (U. Toronto)
Observation operators for CH4 GOSAT, SCIAMACHY in GEOS-Chem Adjoint Dylan Jones (U. Toronto)
Alex Turner (Harvard)
Remove dependence of species drydep on HNO3 drydep Katie Travis (Harvard)
Jenny Fisher (U. Wollongong)
Arctic Hg cycling Jenny Fisher (U. Wollongong)
MOSAIC implementation Sebastian Eastham (MIT)
Updated documentation on setting up new nested domains Lin Zhang (PKU)
Yuxuan Wang (Texas A&M)
Nested model publication wiki page Jun Wang (UNL)
Past and future fire emissions under RCPs Loretta Mickley (Harvard)
Yuhang Wang (GIT)
Shiliang Wu (MT)
QFED fire emissions (up to 2014) Christoph Keller (Harvard)
Katie Travis (Harvard)
Uniformity of units GEOS-Chem Support Team
  • Phase 1 was completed in v11-01e (04 Jan 2016)
  • Remaining phases will be started after FlexChem
Update SO2 scavenging in convective updrafts for consistency Duncan Fairlie (NASA/LARC)
Sedimentation of stratospheric aerosols Sebastian Eastham (MIT)

--Bob Yantosca (talk) 20:50, 17 February 2016 (UTC)

Over the horizon (6-12 months)

Item Author(s) Status
A snow NOx source from deep snowpack Maria Zatko (UW)
Becky Alexander (UW)
Dust emissions at nested-grid resolution Yuxuan Wang (Texas A&M)
Jun Wang (UNL)
Archive meteorological fields with higher resolution (for RCPs) Lee Murray (NASA GISS/LDEO)
Land cover module in GEOS-Chem Jeffrey Geddes (MIT)
Michael Long (Harvard)
Improved lightning emission scheme Lee Murray (NASA GISS/LDEO)
Archive high resolution wind fields for sea salt GEOS-Chem Support Team
PCB simulation Carey Friedman (MIT)
Helen Amos (Harvard)
VBS SOA option Rokjin Park (SNU)
Kz eddy mixing scheme Karen Yu (Harvard)
Update HCN simulation, implement in standard model via Flexchem Jenny Fisher (U. Wollongong)
Merge standard simulation with specialty simulations for OVOC, acids, aromatics, dicarbonyls, terpenes Dylan Millet (UMN)
Xin Chen (UMN)
Cl chemistry updates Lyatt Jaeglé (UW)
Automate redistribution of NOx in HEMCO Lee Murray (NASA GISS/LDEO)
Injection height for fire emissions Emily Fischer (CSU)
Option for daily OH, etc. for Hg simulation Noelle Selin (MIT)
Surface ocean Hg boundary conditions from MITgcm Hannah Horowitz (Harvard)
NetCDF output: Flexible diagnostic package and tracer restart file GEOS-Chem Support Team

--Melissa Sulprizio (talk) 16:56, 9 June 2015 (UTC)

Longer term (12-24 months)

Item Author(s) Status
Global GEOS-FP native-resolution met fields to enable flexible nested domains Jintai Lin (PKU)
Lin Zhang (PKU)
GEOS-Chem Support Team
DMS oxidation scheme updating Tom Breider (Harvard)
Becky Alexander (U. Washington)
Oxidants and Chemistry Working Group
Dynamics of stomatal conductance in dry deposition Amos Tai (CUHK)
New dry deposition module (Zhang et al., 2013) Jintai Lin (PKU)
Bi-directional NH3 emissions Juliet Zhu (CSU)
Lin Zhang (PKU)
Arsenic simulation Shiliang Wu (MT)
Hg benchmark updates for atmosphere and ocean Hannah Horowitz (Harvard)
Viral Shah (UW)
Shaojie Song (MIT)
Emission scheme of dust: subgrid wind variation to remove resolution dependence and better interannual variability David Ridley (MIT)
Ozone damage to vegetation Amos Tai (CUHK)
Implement biogenic emissions of ethane, propane Zitely Tzompa (CSU)
Global evaluation of using LWC and ICW variables from met fields UCLA group
Hongyu Liu (NIA/NASA LARC)
Betty Croft (Dalhousie)
Joint CO/CO2/CH4 forward model simulation Nicholas Deutscher (U. Wollongong)
Subgrid scale precipitation variability Harvard group
Dry deposition: Update the ozone dry deposition scheme Murphy group (UofT)
Country-based weekend/weekday variability for EDGAR v4.2 Lee Murray (NASA GISS/LDEO)
Christoph Keller (Harvard)
Sea salt emission from sea ice Jiayue Huang (UW)
Resolution-independent lightning NOx scaling Lee Murray (NASA GISS/LDEO)
Historical Hg emissions (1850-present) Hannah Horowitz (Harvard)
Nested-grid model with GEOS-FP at 1/2° x 5/8° resolution Nested Model Working Group
TNO emissions over Europe (7km) Greece team
Re-evaluation of SST dependence of sea salt emissions Jiayue Huang (UW)

--Melissa Sulprizio 14:08, 11 May 2015 (EDT)