GEOS-Chem model development priorities

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On this page we list the priorities for ongoing GEOS-Chem model development. We also list the items that were once identified as priorities but have since been added to the standard mainline GEOS-Chem code.

List of priorities identified at IGC5

This is a list of planned GEOS-Chem model development items, based on discussions and Working Group reports from the and 5th International GEOS-Chem Meeting (aka IGC5). The key model developer or model contact is identified for each item.

We count on user input to augment and prioritize this list, please contact your Working Group Chair or model scientist Daniel Jacob.

For immediate implementation (awaiting release)

Item Author(s) Status
APM aerosol microphysics Fangqun Yu (SUNY Albany) Will be included in v9-01-02
GFED3 biomass burning Prasad Kasibhatla (Duke) Will be included in v9-01-02
FAA/AEDT aircraft emissions inventory Steven Barrett et al (MIT) Will be included in v9-01-02
Aerosol deposition over snow/ice Jenny Fisher (Harvard) Will be included in v9-01-02
Seasonal variation of Asian NH3 emissions Jenny Fisher (Harvard) Will be included in v9-01-02
Cleanup of AOD diagnostics Sungshik Patrick Kim (Harvard) Will be included in v9-01-02
RETRO anthropogenic VOC emissions Dylan Millet (U. Minnesota) Will be included in v9-01-02

--Bob Y. 10:59, 6 June 2011 (EDT)

Ready to go in

Item Author(s) Status
Nested-grid Hg simulation Lyatt Jaeglé (U. Washington)
Nested-grid CO2 simulation Yuxuan Wang (Tsinghua U.)
Stratospheric P and k (monthly climatological) Lee Murray (Harvard)
Inorganic chemistry updates Mat Evans (Leeds)
GEIA 2005 Hg emissions Bess Corbitt (Harvard)
Expanded SOA Havala Pye (EPA/ORD)
Dust submicron size distribution for optics David Ridley (Colo. State)
GEIA emissions scale factor fix Dylan Millet (U. Minnesota)
Longwave & shortwave RF codes for chemistry-climate Fangqun Yu (SUNY Albany)
Improved sea salt emission & deposition Lyatt Jaeglé (U. Washington) Code delivered to GCST, awaiting implementation
Improved snow scavenging and washout parameterization Qiaoqiao Wang (Harvard)

--Bob Y. 10:59, 6 June 2011 (EDT)

Almost there (< 6 months)

Item Author(s) Status
New soil NOx emission module Rynda Hudman (UC Berkeley) Code delivered to GCST, awaiting implementation
APM capability for nested grid Fangqun Yu (SUNY Albany)
TOMAS capability for nested grid Jeff Pierce (Dalhousie)
Fix of global OH diagnostic Mat Evans (Leeds)
Jingqiu Mao (NOAA/GFDL)
Chemical updates for atmospheric Hg Bess Corbitt (Harvard)
Jenny Fisher (Harvard)
Streets future Hg emissions Bess Corbitt (Harvard)
EPA/NEI2005 Hg emissions for US Lyatt Jaeglé (U. Washington)
Hg(II) gas-aerosol partitioning Helen Amos (Harvard)
Update to EDGAR 4 anthropogenic emissions Qiang Zhang (Tsinghua)
Updated diurnal variation of US NEI emissions Rynda Hudman (UC Berkeley)
Satellite-based NOx emission trends Lok Lamsal (NASA GSFC)
PARANOX ship plume emissions Geert Vinken (Eindhoven)
Interannual lightning Lee Murray (Harvard)
Primary marine OA emissions Kateryna Lapina (CSU)
Complete shift of biogenic VOC emissions from GEIA to MEGAN; retire GEIA Dylan Millet (U. Minnesota)
Update HCN simulation Qian Li (U. Edinburgh)
Dylan Jones (U. Toronto)
Implement GISS advection scheme for GISS-driven applications GEOS-Chem Support Team

--Bob Y. 11:10, 6 June 2011 (EDT)

Over the horizion (6-12 months)

Item Author(s) Status
Working with GEOS-5.7.3 GEOS-Chem Support Team
Nested-grid model at 0.25&deg x 0.3125&deg resolution Yuxuan Wang (Tsinghua)
High-resolution emissions for above nested-grid model Yuxuan Wang (Tsinghua)
Improved acetone simulation Emily Fischer (Harvard)
Tropospheric bromine chemistry Justin Parrella (Harvard)
OVOC's dry deposition Jingqiu Mao (NOAA/GFDL)
Improved planeflight diagnostic Mat Evans (Leeds)
Chemistry diagnostics Mat Evans (Leeds)
Documentation of chemical mechanism Jingqiu Mao (NOAA/GFDL)
Box model version of GEOS-Chem chemical mechanism Jingqiu Mao (NOAA/GFDL)
Improved operator splitting Mauricio Santillana (Harvard)
Updated dicarbonyl simulation May Fu (Peking U.)
3-D VOC source for tagged CO simulations Dylan Jones (U. Toronto)
Replace CASA CO2 biosphere climatology with year-specific fluxes Ray Nassar (Environment Canada)
Dylan Jones (U. Toronto)
Satellite diagnostic for XCO2 Liang Feng (U. Edinburgh)
Move to 2° x 2.5° versions of GISS GCM ModelE and Model3 Loretta Mickley (Harvard) For more information, please see the GISS Model E Memo
by (Lee Murray and Loretta Mickley).
Implement IPCC AR5 scenarios Loretta Mickley (Harvard)
CO2 inhibition effect for isoprene emisison Loretta Mickley (Harvard)

--Bob Y. 11:19, 6 June 2011 (EDT)

Longer term (> 12 months)

Item Author(s) Status
Column version of GEOS-Chem GEOS-Chem Support Team Development is ongoing
Improved dust simulation in nested-grid model Rokjin Park (Seoul Nat'l Univ.)
Isoprene chemistry Mat Evans (Leeds)
Jingqiu Mao (NOAA/GFDL)
Improved atmospheric-ocean-land coupling of Hg simulation Hg and POPs Working Group
Unified emissions pre-processor Qiang Zhang (Tsinghua)
Update Asian emissions Qiang Zhang (Tsinghua)
Primary biological aerosol particles (PBAP's) Colette Heald (Colo. State)
Unified radiative forcing module for GEOS-Chem Aerosols Working Group
Effective meteorolgical fields for dust and sea-salt emissions GEOS-Chem Support Team
Dust simulation expansion; tagged simulation, oxalate, Fe, P Matthew Johnson (NCSU)
Cloudwater pH for sulfate formation Becky Alexander (U. Washington)
Benchmark for aerosol deposition Colette Heald (Colo. State)
Tagged sulfate and nitrate simulation Becky Alexander (U. Washington)
Read emission data at native resolution and regrid on the fly GEOS-Chem Support Team
Improve ocean CO2 flux and resolution of anthropogenic sources Ray Nassar (Environment Canada)
CESM/CAM5 interface for chemistry-climate Rokjin Park (Seoul Nat'l Univ.)
Joshua Fu (U. Tennessee)
Link column version of GEOS-Chem with GEOS-GCM for chemistry-climate GEOS-Chem Support Team

--Bob Y. 11:33, 6 June 2011 (EDT)

Items that are now included in GEOS-Chem

Here we list new features that have since been brought into the standard mainline GEOS-Chem code. Each of these was identified as a priority at the 4th International GEOS-Chem Meeting in 2009 (aka IGC4) or the 5th International GEOS-Chem Meeting in 2011 (aka IGC5).

Priorities from IGC5 that have been implemented into GEOS-Chem

Item Author(s) Completion Date
FlexAOD postprocessor Gabriele Curci (U. L'Aquila) 26 May 2011

--Bob Y. 12:31, 13 June 2011 (EDT)

Priorities from IGC4 that have been implemented into GEOS-Chem

Item Author(s) Completion Date
Acquire long-term MERRA archive GEOS-Chem Support Team Now included in GEOS-Chem v9-01-01, released 10 Feb 2011
Terrestrial and deep ocean mercury Nicole Smith-Downey
Elsie Sunderland
Chris Holmes
and Team-Hg
Now included in GEOS-Chem v8-03-02, released 07 Sep 2010
CO2 including tagged tracers Ray Nassar Now included in GEOS-Chem v8-03-02, released 07 Sep 2010
ISORROPIA II Havala Pye
Thanos Nenes
Becky Alexander
Now included in GEOS-Chem v8-03-01, released 04 May 2010
Global 1x1.25 model capability Lok Lamsal Now included in GEOS-Chem v8-03-01, released 04 May 2010
Updated aerosol optical properties Colette Heald
Randall Martin
and the Aerosols Working Group
Now included in GEOS-Chem v8-03-01, released 04 May 2010
TOMAS aerosol microphysics Peter Adams
Dan Westervelt
Win Trivitayanurak
Now included in GEOS-Chem v8-03-01, released 04 May 2010
Aerosol data sets for benchmarking Colette Heald IMPROVE PM2.5 data are now included in the 1-yr benchmark plots
starting with GEOS-Chem v8-02-04
Linoz stratospheric ozone chemistry Dylan Jones Now included in GEOS-Chem v8-02-04, released 24 Feb 2010
Methane including tagged tracers Kevin Wecht Now included in GEOS-Chem v8-02-03, released 14 Oct 2009
ICOADS ship emissions Chulkyu Lee Now included in GEOS-Chem v8-02-03, released 14 Oct 2009
KPP chemical solver Kumaresh Singh Now included in GEOS-Chem v8-02-03, released 14 Oct 2009
Local stratospheric ozone column from GEOS-5 GEOS-Chem Support Team Now included in GEOS-Chem v8-02-03, released 14 Oct 2009
Common model adjoint and documentation Daven Henze
Kumaresh Singh
Monika Kopacz
Code merging session took place June 6-9, 2009 @ Virginia Tech
  • Merged 3 branches of adjoint
  • Forward model now based on v8-02-01 (w/ GEOS-5)
  • Input files cleaned up and standardized
  • New makefiles; code separated into subdirectories
  • New CVS repository @ U. Colorado for code access
  • Some minor cleanup may still be needed (as of June 2009)
Chemical updates Mat Evans
Fabien Paulot
Jingqiu Mao
Paul Palmer
Updated chemical mechanism and photolysis files
globchem.dat, jv_spec.dat, ratj.d
(see documentation)
Now included in GEOS-Chem v8-02-01; released 26 May 2009
BC/OC aerosol emissions from Bond inventory Eric Leibensperger Now included in GEOS-Chem v8-02-02; released 08 Jun 2009
Improved BL mixing scheme Jintai Lin Now included in GEOS-Chem v8-02-02; released 08 Jun 2009

--Bob Y. 12:31, 13 June 2011 (EDT)