Carbon Cycle Working Group

All users interested in the GEOS-Chem carbon gas simulations (CO, CO2, CH4, etc.) are encouraged to subscribe to the carbon gases email list (click on the link in the contact information section below).

Contact information

Carbon Cycle Working Group Co-Chairs	Ray Nassar, Kevin Bowman
Carbon Cycle Working Group email list	geos-chem-carbon [at] seas.harvard.edu
To subscribe to email list	Send email to geos-chem-carbon-join [at] seas.harvard.edu
To unsubscribe from email list	Send email to geos-chem-carbon-leave [at] seas.harvard.edu

Current Carbon Cycle Projects (please add yours!)

Simulation	User Group	Description	Contact Person	Date Added
		Projects using CH4 simulations
Methane	U. Edinburgh	Regional methane sources using surface in situ and GOSAT and IASI satellite observations and an ensemble Kalman filter	Annemarie Fraser	10 Jun 2009
Methane	Harvard	Methane sources and sinks based on in situ and satellite observations	Kevin Wecht	12 May 2011
Methane	Harvard	Inverse modeling of methane with GOSAT	Alex Turner	7 May 2013
Methane	Purdue University	Methane sources in Pan-Arctic region	Zeli Tan	26 Nov 2012
		Projects using CO and/or Tagged CO simulations
Tagged CO	U. Wollongong	Source attribution of Australasian pollution	Jenny Fisher	5 Nov 2012
Tagged CO	Harvard	Using tagged CO simulation to study transport in the UT/LS	Junhua Liu	12 May 2011
Tagged CO	JPL	Using tagged CO simulations to interpret MLS observations	Jianjun Jin	12 May 2011
Tagged CO and full chemistry	Duke	CO sources from biomass burning (NOTE: Cross-listed under full-chemistry)	Prasad Kasibhatla	15 Jun 2009
Tagged CO	U. Toronto	Adjoint analysis of CO sources from MOPITT	Zhe Jiang	09 Jun 2009
		Projects using CO2 simulations
CO2	Caltech	Source/sink estimation of CO2 using ground-based FTS observations	Janina Messerschmidt	26 Sept 2011
CO2	UEA	CO2 flux inversionS	ZhaoHui Chen	1 Jul 2011
CO2	U. Edinburgh	Using GEOS-Chem for CO2 flux inversions	James Barlow	12 May 2011
CO2/Tagged CO	Harvard	Using CO/CO2 correlations for CO2 inverse modeling	Helen Wang	12 May 2011
CO2	Tsinghua U.	Nested grid simulation to interpret surface CO2 observations	Yuxuan Wang	12 May 2011
CO2	Environment Canada	CO2 modeling and source/sink estimation	Ray Nassar	11 Apr 2011
CO2	U. Edinburgh	CO2 simulation and surface flux estimation by using Ensemble Kalman Filter	Liang Feng	18 Aug 2010
CO2/CO Adjoint	JPL	Source/state estimation of CO2 and CO using atmospheric CO2/CO satellite observations	Kevin Bowman	28 Jun 2010
CO2	U. Toronto	Modeling CO2 and its sources and sinks with GEOS-Chem	Dylan Jones	09 Jun 2009
CO2	IUP U. Bremen	Study the CO2 and OCS relationship using ground-based FTS observations and GEOS-Chem	Yuting Wang	17 May 2014

--Bob Y. 15:41, 25 April 2014 (EDT)

Recently Completed Projects (please add yours!)

Simulation	User Group	Description	Contact Person	Publication
Tagged CO	Harvard	Adjoint analysis of CO sources from MOPITT/AIRS/SCIAMACHY	Monika Kopacz	Atmos. Chem. Phys., 10, 855-876, 2010. PDF

--Bob Y. 15:40, 25 April 2014 (EDT)

Development Priorities

Priority	Description	Status
Update biospheric CO2 fluxes	Currently based on CASA (neutral biosphere) output for one particular year and a climatology of net terrestrial exchange. Running with year-specific fluxes from the SiB3 biospheric model will be a new option.	To be included in GEOS-Chem v10-01
Update anthropogenic CO2 fluxes	Implement anthropogenic (fossil fuel combustion) CO2 emissions with higher temporal resolution and perhaps higher spatial resolution.	To be included in GEOS-Chem v10-01
Update ocean CO2 fluxes	Currently using Takahashi et al. (2009) which gives too weak of a global sink. Look into possibilities for scaling or improved ocean fluxes from another source.	To be included in GEOS-Chem v10-01
Tagged CO simulation	Improve treatment of secondary production of CO from VOC oxidation. Currently just scale emissions. Modify code to apply photochemical production rates archived from a full chemistry simulation.
CO-CO2-CH4 simulation	Merge into a single offline simulation for the standard model.
Improved satellite diagnostic	Implement more flexible diagnostic for saving out XCO2 and other satellite-relevant parameters.

--Melissa Payer 10:36, 10 June 2013 (EDT) --Updated by Ray Nassar 2015 April 14, 16:58 (EDT)

Recent updates

The following development items have recently been added to GEOS-Chem:

Version	Released	Description	Contact
v9-02	Mar 2014	EDGAR v4.2 emissions for CH4 simulation	Kevin Wecht (Harvard)

--Melissa Sulprizio 11:08, 17 January 2014 (EST)

The following development items will soon be added to GEOS-Chem:

Version	Released	Description	Contact
v10-01	April 2015 (pending)	Simple Biosphere (SiB3) model balanced biosphere fluxes (2006-2010) for CO2 simulation	Ray Nassar (Environment Canada)
v10-01	April 2015 (pending)	Scaled Takahashi et al. (2009) Ocean CO2 fluxes for 2000-2013 for CO2 simulation	Ray Nassar (Environment Canada)
v10-01	April 2015 (pending)	ODIAC v2013 national fossil fuel combustion emissions for 2000-2014 for CO2 simulation	Ray Nassar (Environment Canada)
v10-01	April 2015 (pending)	TIMES weekly and diurnal fossil fuel temporal scaling factors for CO2 simulation	Ray Nassar (Environment Canada)
v10-01	April 2015 (pending)	Extended time range for CDIAC, chemical CO2 source, shipping and aviation scale factors for CO2 simulation	Ray Nassar (Environment Canada)

--Ray Nassar 2015 April 14, 17:42 (EST)