HR: 11:20h
AN: B32A-05    [Abstracts]
TI: Carbon-Climate Feedbacks in the NCAR Community Climate System Model
AU: * Fung, I
EM: inez@atmos.berkeley.edu
AF: UC Berkeley, Berkeley Atmospheric Sciences, MC 4767, Berkeley, CA 94720-4767
AU: Doney, S C
EM: sdoney@whoi.edu
AF: Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, MS#25, Woods Hole, MA 02543-1543
AU: Lindsay, K
EM: klindsay@ucar.edu
AF: National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307
AU: John, J
EM: jasmin@atmos.berkeley.edu
AF: UC Berkeley, Berkeley Atmospheric Sciences, MC 4767, Berkeley, CA 94720-4767
AB: Climate change influences carbon inventories on land and in the oceans, and they in turn determine the CO2 abundance in the atmosphere. A new generation of climate models predicts the co-evolution of climate and CO2 in the atmosphere. We present results from several experiments of the NCAR carbon-climate model, where fossil fuel emission are specified and vegetation and ocean carbon processes interact with the climate and circulation. In a scenario where fossil fuel emissions, if 100% airborne, would increase the atmospheric CO2 abundance by ~900 ppmv in 2010, a surprising result is that there is only a small difference (~30 ppmv) in the globally-averaged CO2 concentration in the atmosphere whether the land and ocean carbon cycle in the model experiences the control or the evolving climate and circulation. Discussion will focus on how such a model could be assessed, and what research is needed to advance the modeling.
DE: 4806 Carbon cycling
DE: 1620 Climate dynamics (3309)
DE: 0315 Biosphere/atmosphere interactions
DE: 0330 Geochemical cycles
DE: 0400 Biogeosciences
SC: Biogeosciences [B]
MN: 2004 AGU Fall Meeting