GEOS-Chem model development priorities

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 (IGC5) in May 2011 and has been continuously updated since based on code readiness and input from the Working Groups and the Steering Committee.

List of priorities as of Dec 2011

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
Improved acetone simulation	Emily Fischer (Harvard)	Delivered to GCST, slated for v9-01-03
Complete shift of biogenic VOC emissions from GEIA to MEGAN; retire GEIA	Dylan Millet (U. Minnesota)	Delivered to GCST, slated for v9-01-03
OVOC's dry deposition	Jingqiu Mao (NOAA/GFDL)	Delivered to GCST; slated for v9-01-03
Improved sea salt emission & deposition	Lyatt Jaeglé (U. Washington)	Delivered to GCST, slated for v9-01-03
Dust submicron size distribution for optics	David Ridley (Colo. State)	Delivered to GCST, slated for v9-01-03
Improved snow scavenging and washout parameterization	Qiaoqiao Wang (Harvard)	Delivered to GCST, slated for v9-01-03
PARANOX ship plume emissions	Geert Vinken (Eindhoven)	Delivered to GCST, slated for v9-01-03
Expanded SOA	Havala Pye (EPA/ORD)	Delivered to GCST; slated for v9-01-03
Stratospheric P and k (monthly climatological)	Lee Murray (Harvard)	Code is ready (awaiting delivery to GCST); slated for v9-01-03
EPA/NEI2005 Hg emissions for US	Lyatt Jaeglé (U. Washington)	Delivered to GCST, slated for v9-01-03
Satellite-based NOx emission trends	Lok Lamsal (NASA GSFC)	Delivered to GCST, slated for v9-01-03
Streets future Hg emissions	Bess Corbitt (Harvard)	Code is ready, slated for v9-01-03
Hg(II) gas-aerosol partitioning	Helen Amos (Harvard)	Code is ready, slated for v9-01-03
Nested-grid Hg simulation	Lyatt Jaeglé (U. Washington)	Delivered to GCST; slated for v9-01-03
Nested-grid CO2 simulation	Yuxuan Wang (Tsinghua U.)	Delivered to GCST; slated for v9-01-03
Historical emission inventories of SO2, NOx, BC, and POA	Eric Leibensperger (MIT)	Delivered to GCST, slated for v9-01-03

--Bob Y. 11:59, 28 November 2011 (EST)

Ready to go in

Item	Author(s)	Status
Inorganic chemistry updates	Mat Evans (Leeds)	Delivered to GCST; awaiting implementation
New soil NOx emission module	Rynda Hudman (UC Berkeley)	Delivered to GCST, awaiting implementation
Methyl peroxy nitrate (MPN) chemistry	Ellie Browne (UC Berkeley)	Delivered to GCST, awaiting implementation
Acid uptake on dust aerosols	T. Duncan Fairlie (NASA/LARC)	Delivered to GCST, awaiting implementation
Replacing RETRO C2H6 emissons with emissions from the C2H6 offline simulation	Yaping Xiao (UNH)	Awaiting implementation

--Melissa Payer 15:36, 23 November 2011 (EST)

Almost there (< 6 months)

Item	Author(s)	Status
FAA/AEDT aircraft emissions inventory	Steven Barrett et al (MIT)	Code delivered to GCST, on hold
Longwave & shortwave RF codes for chemistry-climate	Fangqun Yu (SUNY Albany)
APM capability for nested grid	Fangqun Yu (SUNY Albany)
TOMAS capability for nested grid	Jeff Pierce (Dalhousie)
Update to EDGAR 4 anthropogenic emissions	Qiang Zhang (Tsinghua)
Interannual lightning	Lee Murray (Harvard)
Primary marine OA emissions	Kateryna Lapina (CSU)
Implement GISS advection scheme for GISS-driven applications	GEOS-Chem Support Team
Tropospheric bromine chemistry	Justin Parrella (Harvard)
Updated dicarbonyl simulation	May Fu (Peking U.)
Satellite diagnostic for XCO2	Liang Feng (U. Edinburgh)
Cloudwater pH for sulfate formation	Becky Alexander (U. Washington)	Code is ready, pending paper acceptance
Tagged sulfate and nitrate simulation	Becky Alexander (U. Washington)
Improve temporal resolution of anthropogenic CO2 sources	Ray Nassar (Environment Canada)
Replace existing regridding routines with the MAP_A2A regridding package	Matt Cooper (Dalhousie)
Improvements to isoprene chemistry, standardization of Paulot Scheme	Fabien Paulot (Harvard) Eloise Marais (Harvard) Jingqiu Mao (NASA/GFDL) Mat Evans (Leeds)
RO2+NO3 chemistry updates	Mat Evans (Leeds)
Inhibition of N2O5 hydrolysis by aerosol nitrate	Lin Zhang (Harvard)
Improved HO2 uptake by aerosol	Jingqiu Mao (NASA/GFDL)
Improved ROOH formation and chemistry	Fabien Paulot (Harvard) Mat Evans (Leeds)

--Melissa Payer 10:45, 5 December 2011 (EST)

Over the horizon (6-12 months)

Item	Author(s)	Status
Update HCN simulation	Qian Li (U. Edinburgh) Dylan Jones (U. Toronto)
Working with GEOS-5.7.2	GEOS-Chem Support Team	Development is ongoing
Nested-grid model at 0.25° x 0.3125° resolution	Yuxuan Wang (Tsinghua)
High-resolution emissions for above nested-grid model	Yuxuan Wang (Tsinghua)
Improved planeflight diagnostic	Mat Evans (Leeds)
Chemistry diagnostics	Mat Evans (Leeds)
Improved operator splitting	Mauricio Santillana (Harvard)	Development is ongoing
3-D VOC source for tagged CO simulations	Dylan Jones (U. Toronto)
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)
Improved dust simulation in nested-grid model	Rokjin Park (Seoul Nat'l Univ.)
Isoprene chemistry	Mat Evans (Leeds) Jingqiu Mao (NOAA/GFDL)	Paper is in progress
Unified emissions pre-processor	Qiang Zhang (Tsinghua)
Update Asian emissions	Qiang Zhang (Tsinghua)
Improve ocean CO2 flux	Ray Nassar (Environment Canada) Kevin Bowman (JPL)
CESM/CAM5 interface for chemistry-climate	Rokjin Park (Seoul Nat'l Univ.) Joshua Fu (U. Tennessee)
Standardize the two-film parameterization of air-sea exchange	Hg and POPs Working Group
Model engineering - improving KPP diagnostics	Mat Evans (Leeds) Barron Henderson (UNC) Mike Long (Harvard)

--Melissa Payer 11:02, 5 December 2011 (EST)

Longer term (> 12 months)

Item	Author(s)	Status
Grid-independent GEOS-Chem	GEOS-Chem Support Team	Development is ongoing
Improved atmospheric-ocean-land coupling of Hg simulation	Hg and POPs Working Group
Primary biological aerosol particles (PBAP's)	Colette Heald (Colo. State)	Only to be implemented if users identified
Unified radiative forcing module for GEOS-Chem	Aerosols Working Group	Under discussion/investigation
Effective meteorolgical fields for dust and sea-salt emissions	GEOS-Chem Support Team
Dust simulation expansion; tagged simulation, oxalate, Fe, P	Matthew Johnson (NCSU)
Benchmark for aerosol deposition	Colette Heald (Colo. State)	TBD
Read emission data at native resolution and regrid on the fly	GEOS-Chem Support Team
Link column version of GEOS-Chem with GEOS-GCM for chemistry-climate	GEOS-Chem Support Team
CO2 inhibition effect for isoprene emission	Loretta Mickley (Harvard)
Replace CASA CO2 biosphere climatology with year-specific fluxes	Ray Nassar (Environment Canada) Dylan Jones (U. Toronto)	TBD

--Melissa Payer 15:17, 6 October 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 5th International GEOS-Chem Meeting in 2011 (aka IGC5).

Item	Author(s)	Completion Date
APM aerosol microphysics	Fangqun Yu (SUNY Albany)	28 Nov 2011 (v9-01-02 release)
GFED3 biomass burning	Prasad Kasibhatla (Duke)	28 Nov 2011 (v9-01-02 release)
Aerosol deposition over snow/ice	Jenny Fisher (Harvard)	28 Nov 2011 (v9-01-02 release)
Seasonal variation of Asian NH3 emissions	Jenny Fisher (Harvard)	28 Nov 2011 (v9-01-02 release)
Cleanup of AOD diagnostics	Sungshik Patrick Kim (Harvard)	28 Nov 2011 (v9-01-02 release)
RETRO anthropogenic VOC emissions	Dylan Millet (U. Minnesota)	28 Nov 2011 (v9-01-02 release)
GEIA emissions scale factor fix	Dylan Millet (U. Minnesota)	28 Nov 2011 (v9-01-02 release)
Chemical updates for atmospheric Hg	Bess Corbitt (Harvard) Jenny Fisher (Harvard)	28 Nov 2011 (v9-01-02 release)
GEIA 2005 Hg emissions	Bess Corbitt (Harvard)	28 Nov 2011 (v9-01-02 release)
Documentation of chemical mechanism	Jingqiu Mao (NOAA/GFDL)	30 Jun 2011
FlexAOD postprocessor NOTE: This is a separate standalone software tool.	Gabriele Curci (U. L'Aquila)	26 May 2011
DSMACC chemical box model NOTE: This is a separate standalone software tool.	Mat Evans (York U.) Jingqiu Mao (Harvard) Eloise Marais (Harvard)	Summer 2011

--Bob Y. 11:53, 28 November 2011 (EST)