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	Kevin Bowman Dylan B.A. Jones
Carbon Cycle Working Group email list	geos-chem-carbon [at] g.harvard.edu
To subscribe to email list	Either Send an email to geos-chem-carbon+subscribe [at] g.harvard.edu Or: Go to the GEOS-Chem Carbon Cycle Google Group Click on Subscribe to this group
To unsubscribe from email list	Either Send an email to geos-chem-adjoint+unsubscribe [at] g.harvard.edu Or Go to the GEOS-Chem Carbon Cycle Google Group Click on the My Settings button Click on Leave this group

--Bob Y. (talk) 16:37, 21 August 2015 (UTC)

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	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
CO2/CH4/CO	U. Wollongong	Joint simulation and source/sink estimation based on remote sensing and in situ (fixed and moving platforms) measurements in Australia	Beata Bukosa	13 April 2017

--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.	Work completed and described in Fisher et al., submitted to GMDD April 2017. To be included in v11-02 or later.
CO-CO2-CH4 simulation	Merge into a single offline simulation for the standard model.	In Development Beata Bukosa
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
v10-01	Jun 2015	Simple Biosphere (SiB3) model balanced biosphere fluxes (2006-2010) for CO2 simulation, implemented via HEMCO	Ray Nassar (Environment Canada)
v10-01	Jun 2015	Scaled Takahashi et al. (2009) Ocean CO2 fluxes for 2000-2013 for CO2 simulation, implemented via HEMCO	Ray Nassar (Environment Canada)
v10-01	Jun 2015	ODIAC v2013 national fossil fuel combustion emissions for 2000-2014 for CO2 simulation, implemented via HEMCO	Ray Nassar (Environment Canada)
v10-01	Jun 2015	TIMES weekly and diurnal fossil fuel temporal scaling factors for CO2 simulation, implemented via HEMCO	Ray Nassar (Environment Canada)
v10-01	Jun 2015	Extended time range for CDIAC, chemical CO2 source, shipping and aviation scale factors for CO2 simulation, implemented via HEMCO	Ray Nassar (Environment Canada)
v10-01	June 2015	The HEMCO emissions component now handles all emissions in GEOS-Chem v10-01 and higher versions.	Christoph Keller (fmr Harvard) GCST
v9-01	Mar 2014	EDGAR v4.2 emissions for CH4 simulation	Kevin Wecht (Harvard)

--Bob Yantosca (talk) 15:38, 23 February 2016 (UTC)

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

Version	Released	Description	Contact
v11-01	TBD 2016	The FlexChem chemical solver will completely replace SMVGEAR. All full-chemistry simulations going forward will use FlexChem (which is based on the KPP solver package).	Mike Long (Harvard) GCST

--Bob Yantosca (talk) 15:38, 23 February 2016 (UTC)