GEOS-Chem participation in community intercomparisons

On this page we provide information about the use of GEOS-Chem in community model intercomparison projects.

Table of intercomparisons using GEOS-Chem results

If you have used GEOS-Chem results in a model intercomparison study, we invite you to add your information to the table below.

Intercomparison	Species	Contributors	G-C version and resolution	Simulation Years	Data Availability	References	Comments
POLARCAT Model Intercomparison	Gas phase species, including O3, CO, NO, NO2, PAN, HNO3, NOy, H2O, C2H6, C3H8, C2H2, acetone, acetaldehyde and OH	Jingqiu Mao (NOAA/GFDL)	v9-01-03 with updated HO2 aerosol uptake GEOS-5 2°x2.5° GMAO global grid	2008	Data submitted to archive.	Arnold et al. (2014): Biomass burning influence on high latitude tropospheric ozone and reactive nitrogen in summer 2008: a multi-model analysis based on POLMIP simulations, Atmos. Chem. Phys. Discuss., 14, 24573-24621. Monks et al. (2014): Multi-model study of chemical and physical controls on transport of anthropogenic and biomass burning pollution to the Arctic, Atmos. Chem. Phys. Discuss., 14, 25281-25350.	Simulations include a 1-year spin-up period (2007) and a full 12-month integration (Jan-Dec 2008) which will be used for comparison with long-term monthly-mean surface observations and satellite fields for 2008. Anthropogenic and ship emissions - David Streets global emission dataset for 2008 (STREETS); Biomass burning emissions: FINNv1 (Fire INventory from NCAR, version 1, from Christine Wiedinmyer) daily biomass burning emissions for 2008, based on MODIS fire counts.
AeroCom AOD and direct aerosol effect	AOD, AAOD, and direct radiative forcing	Xiaoyan Ma and Fangqun Yu (SUNY-Albany)	v8-03-02 with APM GEOS-5 4°x5° GMAO global grid	2006	Data submitted to AeroCom in September 2011 and should be available at AeroCom web site at some point.	Manuscript lead by Dr. Gunnar Myhre (CICERO) in preparation	AOD calculated online based on size, composition, and mixing state resolved particle properties simulated by APM. Aerosol direct radiative forcing with and without anthropogenic emissions calculated with a recently incorporated radiative transfer module. In the process of running the model at 2°x2.5° resolution and the 4°x5° simulations will be updated with 2°x2.5° results. See this wiki page for information on APM microphysics.
AeroCom OA	Organic aerosols	Gabriele Curci (University of L'Aquila)	v8-02-02 GEOS-5 2°x2.5° GMAO global grid	2006	http://aerocom.met.no/data.html	No references at the moment, activity in progress	Saharan dust emissions were reduced by a factor of 3 following Generoso et al. (JGR 2008). A dedicated software was developed for conversion from GEOS-Chem binary format to AeroCom netCDF format (available on request). Main model description (xls file) See this wiki page for information on calculated optical properties.
AeroCom OA	OC and SOA	Gan Luo and Fangqun Yu (SUNY-Albany)	v8-02-02 with APM GEOS-5 2°x2.5° GMAO global grid	2006	Data submitted to AeroCom in Jan 2011 and should be available at AeroCom web site at some point.	Manuscript lead by Dr. Kostas Tsigaridis (NASA-GISS) in preparation	SOA formation based on an extended 2-product method considering oxidation aging. See this wiki page for information on APM microphysics.
AeroCom Microphysics	Particle size distributions	Fangqun Yu and Gan Luo (SUNY-Albany)	v8-02-02 with APM GEOS-5 2°x2.5° GMAO global grid	2006	Data submitted to AeroCom in Jan 2011 and should be available at AeroCom web site at some point.	Manuscript lead by Dr. Graham Mann (Uni Leeds) in preparation	See this wiki page for information on APM microphysics.
Hemispheric Transport of Air Pollution 2007 (HTAP)	Ozone and its precursors, aerosols	Rokjin J. Park (then Harvard University; now at Seoul National University)	v7-04-09, GEOS-4 2° x 2.5° GMAO global grid	2001	http://www.htap.org (registration required)	TF-HTAP, Hemispheric transport of air pollution 2007, United Nations, New York and Geneva, 2007 Fiore, A. M., Dentener, F. J., Wild, O., Cuvelier, C., Schultz, M. G., Hess, P., Textor, C., et al., Multimodel estimates of intercontinental source-receptor relationships for ozone pollution, J. Geophys. Res., 114, D04301, doi:10.1029/2008JD010816, 2009.
TransCom CH4 intercomparison	CH4, SF6, MCF, and radon	Annemarie Fraser and Paul Palmer (U. of Edinburgh)	v8-01-01 GEOS-4/5 2°x2.5° GMAO global grid	1990-2007 (with two year spin up)	See the project web page for data access instructions.	ACP paper can be found here.	The intercomparison protocol can be found here.
Southern Hemisphere intercomparison	CO, HCHO, and others?	Jenny Fisher (U. of Wollongong)	v9-01-03 GEOS-5 2°x2.5° GMAO global grid	2003-2007 (may change)	Still in planning phase.	N/A	Still in planning phase.
Global Carbon Project - Methane	CH4 fluxes	Annemarie Fraser and Paul Palmer (U. of Edinburgh)	v8-01-01 GEOS-5 2°x2.5° GMAO global grid	2000-2010	Not available yet.	Paper submitted to Nature Geosciences in April 2012.	No protocol - groups were asked to retrieve fluxes using their own preferred methods.
Add yours here!

--Bob Y. 11:30, 14 November 2011 (EST)

References

1. Generoso, S., I. Bey, M. Labonne, and F.M. Bréon, Aerosol vertical distribution in dust outflow over the Atlantic: Comparisons between GEOS-Chem and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO), J. Geophys. Res., 113, D24209, doi:10.1029/2008JD010154, 2008.

--Melissa Payer 11:56, 10 November 2011 (EST)