GEOS-Chem model development priorities

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Revision as of 18:09, 11 May 2017 by Melissa Payer (Talk | contribs) (Slated for inclusion in v11-02)

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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 (IGC8) in May 2017 and will be continuously updated 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 2017

The items listed below are in different stages of readiness and will be included in future versions of the model.

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. More information on those items can be obtained on the GEOS-Chem v11-02 wiki page.

Item Author(s) Status
Science updates
Updating chemistry rate constants based on JPL Publication 15-10 Barron Henderson (U. Florida)
Mat Evans (U. York)
Oxidants and Chemistry WG
  • Included in v11-02a (pending approval)
PAN updates (including emissions, deposition, species, chemistry) Emily Fischer (CSU)
  • Included in v11-02a (pending approval)
Monthly mean NEI2011 emissions GCST
Katie Travis (Harvard)
  • Included in v11-02a (pending approval)
Structural/programming updates
TBD
Documentation
TBD

--Melissa Sulprizio (talk) 17:19, 11 May 2017 (UTC)

Ready to go in

Slated for inclusion in v11-02

The following items were prioritized for inclusion in GEOS-Chem v11-02.

Item Author(s) Type Status
Chemistry updates
Updates to isoprene chemistry, includes:
  • Fast photolysis of carbonyl nitrates
  • Aerosol uptake of organic nitrates
  • Nighttime isoprene chemistry
  • Updated organic deposition
  • Remove dependence of species drydep on HNO3 drydep
Jenny Fisher (U. Wollongong)
Eloïse Marais (Harvard)
Katie Travis (Harvard)
Kelvin Bates (Caltech)
Rebecca Schwantes(Caltech)
Science
  • Delivered to GCST (Mar 2017)
  • Slated for v11-02c
Enhance default GEOS-Chem simple SOA Aerosol Working Group Chairs Science
Add aqueous isoprene uptake to SOA scheme Eloise Marais (Harvard) Science
  • Delivered to GCST (Jul 2016)
  • Slated for v11-02c
Carbon balance (fix C creation) Sarah Safieddine (MIT) Bug fix
Other N, C, etc. balance Barron Henderson (EPA) External script
Halogen chemistry updates Tomás Sherwen (York)
Johan Schmidt (Harvard)
Oxidants and Chemistry WG
Science
Sulfur oxidation by reactive halogens Qianjie Chen (UW) Science
  • Slated for v11-02d
  • Implement as part of halogen chemistry
Update density of BC to 1.8 and add absorption enhancement factor in input.geos Xuan Wang (MIT) Science
Monthly mean surface methane distributions Lee Murray (NASA GISS/LDEO) Science
Remove initial stratospheric 2D mixing ratio option Seb Eastham (Harvard) Science
UCX stratospheric water boundary condition update Chris Holmes (UC Irvine)
Seb Eastham (Harvard)
Science
  • Slated for v11-02e
  • Delivered to GCST (Jan 2017)
Tagged sulfate and nitrate simulation, including Becky Alexander (UW) Science
Radon flux diagnostic GCST Benchmarking
Mercury updates
Updates to Hg chemistry from Horowitz et al. (2017) Hannah Horowitz (U. Washington)
Colin Thackray (Harvard)
Rebecca Stern (Harvard)
Science
Year 2010 ocean Hg boundary conditions from MITgcm Hannah Horowitz (Harvard) Science
Historical products emissions from Zhang et al. (2016), should become default Colin Thackray (Harvard) Science
Transport updates
GEOS resolution & subgrid convection Karen Yu (Harvard) Science
Emission updates
OMI-based Volcanic emissions 2005-2012 Jun Wang (U. Iowa) Science
  • Delivered to Christoph Keller?
EDGAR v4.3.1 emissions Chi Li (Dalhousie) Science
  • Delivered to GCST (Nov 2016)
EPA-derived BC/OA emissions over US (1990-2012) David Ridley (MIT)
Chi Li (Dalhousie)
Science
  • Need to coordinate between two versions
Historical CAC emissions Chi Li (Dalhousie) Science
  • Delivered to GCST (Nov 2016)
Ammonia emissions from Arctic birds Betty Croft (Dalhousie) Science
Ocean ammonia emission inventory Fabien Paulot (NOAA/GFDL) Science
  • Data files delivered to GCST (Jan 2016)
  • Needs to be implemented via HEMCO
A snow NOx source from deep snowpack Maria Zatko (UW)
Becky Alexander (UW)
Science
  • Implemented in v9-01-01
  • Needs to be added as a HEMCO extension
MASAGE inventory in HEMCO as default Fabien Paulot (NOAA/GFDL)
Amos Tai (CUHK)
Science
Non-agricultural NH3 for use with MASAGE Amos Tai (CUHK) Science
Radon emission update Bo Zhang (NIA/NASA Langley) Science
Global ethane emissions Zitely Tzompa-Sosa (CSU) Science
Inefficient combustion emissions in Africa (DICE-Africa inventory) Eloise Marais (U. Birmingham)
Christine Wiedinmyer (NCAR)
Science
Trash burning emissions Eloise Marais (U. Birmingham)
Christine Wiedinmyer (NCAR)
Science
GFAS biomass burning emissions Mat Evans (York) Science
MEIC emissions over China Jonathan Moch (Harvard), Loretta Mickley (Harvard) Science
Deposition/surface updates
Harmonizing Henry's Law coefficients across wet and dry deposition GCST Science
Sedimentation of stratospheric aerosols Sebastian Eastham (Harvard) Science
Specialty simulation updates
Updated Tagged CO simulation Jenny Fisher (Wollongong) Science
India nested-grid for GEOS-5 Sreleekha Chaliyakunnel (U. Minnesota) Science
Africa nested-grid for GEOS-5 Eloise Marais (U. Birmingham) Science
West Africa nested-grid for GEOS-FP Mat Evans (York)
Eleanor Morris (York)
Science
Tagged sulfate simulation Becky Alexander Science
Structural updates
Uniformity of units GCST Structural
  • 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
NetCDF Output Phase 3a: Output diagnostics in NetCDF format GCST Structural
NetCDF Output Phase 3b: Updates to eliminate differences between single and multi-segmented GEOS-Chem runs GCST
Christoph Keller
Bug fix/Structural
Expansion of model capabilities
Additional modifications for FlexChem, including:
  • Rebuild the pre-built chemistry mechanisms (Standard, Tropchem, UCX, SOA, SOA-SVPOA) with Kppa
  • Add capability for custom chemistry mechanism by building KPP on-the-fly in GEOS-Chem
Mike Long (Harvard)
GCST
Structural
FlexGrid: Use HEMCO I/O and regridding capabilities to read and regrid met fields Jiawei Zhuang (Harvard)
Jintai Lin (PKU)
Structural
  • Delivered to GCST (Oct 2016)
Merge standard simulation with specialty simulations for OVOC, acids, aromatics, dicarbonyls, terpenes Dylan Millet (UMN)
Xin Chen (UMN)
Science
Nested CO2, CH4, Hg, TOMAS, adjoint, etc. Nested Model Working Group Science

--Melissa Sulprizio (talk) 17:19, 11 May 2017 (UTC)

Defer to v11-03 unless ready in time for v11-02

Item Author(s) Type Status
Global evaluation of using LWC and IWC from met fields for wet scavenging Hongyu Liu (NIA/NASA LARC)
Bo Zhang (NIA)
Science
Kz eddy mixing scheme Karen Yu (Harvard) Science
VBS SOA option Rokjin Park (SNU) Science
Benchmark of stratosphere simulation Dylan Jones (U. Toronto) Benchmarking
  • 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

--Melissa Sulprizio (talk) 17:19, 11 May 2017 (UTC)

Not prioritized for v11-02

Item Author(s) Type Status
Python GEOS-Chem output processing and visualization package Benoît Bovy (U. Liège-Belgium) Software package
  • Users may download, test it, and submit feedback to Benoit Bovy.
Sea salt emission from sea ice Jiayue Huang (UW) Science
Re-evaluation of SST dependence of sea salt emissions Jiayue Huang (UW) Science
MOSAIC implementation Sebastian Eastham (Harvard) Science
Update MODIS LAI fields through 2015 Barron Henderson (UF) Science
Lightning NOx chemistry parameterization Alicia Gressent (MIT) Science

--Melissa Sulprizio (talk) 17:19, 11 May 2017 (UTC)

Almost there (< 6 months)

Item Author(s) Type Status
PCB simulation Colin Thackray (Harvard)
Carey Friedman (formerly MIT)
Helen Amos (formerly Harvard)
Science

--Melissa Sulprizio (talk) 17:40, 11 May 2017 (UTC)

Over the horizon (6-12 months)

Item Author(s) Type Status
Update SO2 scavenging in convective updrafts for consistency Duncan Fairlie (NASA/LARC) Science
Dust emissions at nested-grid resolution Yuxuan Wang (Texas A&M)
Jun Wang (UNL)
Science
Archive meteorological fields with higher resolution (for RCPs) Lee Murray (NASA GISS/LDEO) Science
Land cover module in GEOS-Chem Jeffrey Geddes (MIT)
Michael Long (Harvard)
Science
Improved lightning emission scheme Lee Murray (NASA GISS/LDEO) Science
Archive high resolution wind fields for sea salt GEOS-Chem Support Team Science
Cl chemistry updates Lyatt Jaeglé (UW) Science
Automate redistribution of NOx in HEMCO Lee Murray (NASA GISS/LDEO) Science
Include Hg in full chemistry Noelle Selin (MIT) Science
DMS oxidation scheme updating Tom Breider (Harvard)
Becky Alexander (U. Washington)
Oxidants and Chemistry Working Group
Science
Historical Hg emissions (1850-present) Hannah Horowitz (Harvard) Science
  • Awaiting completion of David Street's revised 1850-present inventory
Joint CO/CO2/CH4 forward model simulation Nicholas Deutscher (U. Wollongong) Science
Past and future fire emissions under RCPs Loretta Mickley (Harvard)
Yuhang Wang (GIT)
Shiliang Wu (MT)
Science
  • Some regional (western US, Canada, and Alaska) inventories for the 2050s A1B scenario are available by request (Loretta Mickley).
  • Further work on global scale and other scenarios are underway.
Benchmark for 0.25x0.3125 nested NA model Jun Wang (UNL) Benchmarking
Emission scheme of dust: subgrid wind variation to remove resolution dependence and better interannual variability David Ridley (MIT) Science

--Melissa Sulprizio (talk) 17:19, 11 May 2017 (UTC)

Longer term (12-24 months)

Item Author(s) Type Status
Tagged sulfate and nitrate simulation, including Becky Alexander (UW) Science
  • These updates been implemented in v9-02, but have not been successfully merged with HEMCO in v10-01
  • Improvements for the tagged nitrate simulation are in the pipeline
CO2 dependence of stomata conductance in dry deposition Amos Tai (CUHK) Science
Ozone damage to vegetation Amos Tai (CUHK) Science
Bi-directional NH3 emissions Juliet Zhu (CSU)
Lin Zhang (PKU)
Science
Arsenic simulation Shiliang Wu (MT) Science
Dry deposition: Update the ozone dry deposition scheme Murphy group (UofT) Science
Country-based weekend/weekday variability for EDGAR v4.2 Lee Murray (NASA GISS/LDEO)
Christoph Keller (Harvard)
Science
Resolution-independent lightning NOx scaling Lee Murray (NASA GISS/LDEO) Science
Nested-grid model with GEOS-FP at 1/2° x 5/8° resolution Nested Model Working Group Structural

--Melissa Sulprizio (talk) 17:19, 11 May 2017 (UTC)