NOTE: Page under construction
This page contains information about the carbon dioxide (CO2) simulation in GEOS-Chem.
The current GEOS-Chem CO2 simulation was developed by Parv Suntharalingam, now at the University of East Anglia (Suntharalingam et al., 2003; 2004). A major update to the CO2 simulation has been developed by Ray Nassar and Dylan B.A. Jones of the University of Toronto (Nassar et al., 2010). This update was delivered to the GEOS-Chem software development team at Harvard on 2010 April 1.
The update retains the original six CO2 fluxes: fossil fuel, ocean exchange, biomass burning, biofuel burning, balanced terrestrial exchange (CASA) and net annual terrestrial exchange. New inventories are available as options for some of these fluxes and other new fluxes have been added such as CO2 emissions from international shipping and aviation. There is also now an optional feature to include CO2 production from the oxidation of CO, CH4 and NMVOCs. This will make GEOS-Chem the only model to account for the chemical production of CO2. This chemical source is an online implementation of the concept described in Suntharalingam et al. (2005), now with seasonality, updated year-specific numbers and other modifications.
The full GEOS-Chem CO2 update was applied to v8-02-01 (along with some patches). It is now undergoing testing and should be publicly available in the next GEOS-Chem release (v8-03-02). The model update will be accompanied by an update to the GEOS-Chem online manual. The references below are cited in the updated code's comments and online manual.
Authors and collaborators
CO2 simulation user groups
|University of Toronto||Ray Nassar||Model updates and application to inverse modeling|
|Korea Environment Institute (KEI)]||Changsub Shim||Add yours here!|
The updated CO2 simulation will be incorporated into GEOS-Chem v8-03-02. In Nassar et al. (2010) model comparisons are made with GLOBALVEIW-CO2 (http://www.esrl.noaa.gov/gmd/ccgg/globalview/co2/co2_intro.html) and CONTRAIL (Comprehensive Observation Network for TRace gases by AIrLiner) measurements. In other work, the CO2 simulation has also been compared with aircraft observations from the HIAPER Pole-to-Pole Observations (HIPPO) campaigns of 2009.
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- Nassar, R., D. B. A. Jones, P. Suntharalingam, J. M. Chen, R. J. Andres, K. J. Wecht, R. M. Yantosca, S. S. Kualwik, K. W. Bowman, J. R. Worden, T. Machida, H. Matsueda, Modeling global atmospheric CO2 with improved emission inventories and CO2 production from the oxidation of other carbon species, Geoscientific Model Development Discussions, submitted, 2010.
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- Suntharalingam, P., J. T. Randerson, N. Krakauer, J. A. Logan, and D. J. Jacob, Influence of reduced carbon emissions and oxidation on the distribution of atmospheric CO2: Implications for inversion analyses, Global Biogeochem. Cycles, 19, GB4003, doi:10.1029/2005GB002466, 2005.
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- Takahashi, T., et al., Climatological mean and decadal change in surface ocean pCO2, and net sea–air CO2 flux over the global oceans, Deep-Sea Res. II, doi:10.1016/j.dsr2.2008.12.009, 2009.
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- Yevich, R., and J. A. Logan, An assessment of biofuel use and burning of agricultural waste in the developing world, Global Biogeochem. Cycles, 17(4), 1095, doi:10.1029/2002GB001952, 2003. PDF
None at this time.
--Bob Y. 12:26, 29 March 2010 (EDT)
--Ray Nassar 11:36, 29 April 2010 (EDT)