Kawa, Stephan (Randy): NASA GSFC (Project Lead)
Collatz, George (Jim): NASA GSFC - retired (Co-Investigator)
Denning, Scott: Colorado State University (Co-Investigator)
Crowell, Sean: LumenUs Scientific, LLC (Participant)
Erickson, David: Oak Ridge National Lab (Participant)
Lokupitiya, Ravindra (Ravi): Colorado State University (Participant)
Project Funding:
2005 - 2010
Funded by NASA
Abstract:
We propose to reduce uncertainty in the carbon cycle processes that create the so-called missing sink of atmospheric CO2. Our overall objective is to improve characterization of CO2 source/sink processes globally with improved formulations for atmospheric transport, terrestrial uptake and release, biomass and fossil fuel burning, and observational data analysis. The motivation for this study follows from the perspective that progress in determining CO2 sources and sinks beyond the current state of the art will rely on utilization of more extensive and intensive CO2 and related observations including those from satellite remote sensing. The anticipated results are improved, data-constrained models that resolve transport and emission distributions at global to synoptic scales, methods to use the information contained in simulations and data at these scales, and refined inferences of CO2 sources and sinks and their dependence on environmental conditions. These results will be valuable in designing remote sensing approaches to determine global distributions and fluxes of carbon, to prepare for the use of OCO and other satellite data, and to develop modeling tools that contribute to a multi-disciplinary carbon data assimilation system for analysis and prediction of carbon cycle changes and carbon/climate interactions.
Publications:
Erickson, D. J., Mills, R. T., Gregg, J., Blasing, T. J., Hoffman, F. M., Andres, R. J., Devries, M., Zhu, Z., Kawa, S. R. 2008. An estimate of monthly global emissions of anthropogenic CO2: Impact on the seasonal cycle of atmospheric CO2. Journal of Geophysical Research: Biogeosciences. 113(G1). DOI: 10.1029/2007JG000435
Alkhaled, A. A., Michalak, A. M., Kawa, S. R., Olsen, S. C., Wang, J. 2008. A global evaluation of the regional spatial variability of column integrated CO2distributions. Journal of Geophysical Research. 113(D20). DOI: 10.1029/2007JD009693
Lokupitiya, R. S., Zupanski, D., Denning, A. S., Kawa, S. R., Gurney, K. R., Zupanski, M. 2008. Estimation of global CO2fluxes at regional scale using the maximum likelihood ensemble filter. Journal of Geophysical Research. 113(D20). DOI: 10.1029/2007JD009679
Alkhaled, A. A., Michalak, A. M., Kawa, S. R. 2008. Using CO2spatial variability to quantify representation errors of satellite CO2retrievals. Geophysical Research Letters. 35(16). DOI: 10.1029/2008GL034528
Parazoo, N.C., A.S. Denning, S.R. Kawa, K.D. Corbin, R.S. Lokupitiya, I. T. Baker. 2008. Mechanisms for synoptic variations of atmospheric CO2 in North America, South America and Europe. Atmos. Chem. Phys., 8: 7239-7254.
More details may be found in the following project profile(s):
