3rd Biennial Meeting of the International Environmental Modelling and Software Society (iEMSs)

Summit on Environmental Modelling and Software
Burlington, Vermont
July 9-13, 2006

Title: Recent Results From Coupled Climate/Carbon-Cycle Models in CCSM3

Authors: Forrest Hoffman, Inez Fung, W. Mac Post, David Erickson

Abstract: Two terrestrial biogeochemistry modules (CN by Thornton and CASA' by Fung, et al.) have been coupled to the Community Land Model Version 3 (CLM3), the land component model contained in the Community Climate System Model Version 3 (CCSM3). A third terrestrial biogeochemistry module called IBIS (the Integrated Biosphere Simulator) by Foley, et al., has also been coupled to CCSM3 by Mirin, et al., and will be used to further explore land-atmosphere interactions specific to the global carbon cycle within the CCSM framework. A detailed model intercomparison project has been undertaken by the CCSM Biogeochemistry Working Group to elucidate the differences among these biogeochemistry modules in an effort to understand the terrestrial processes important to modeling the carbon cycle in a fully coupled Earth system model. It is expected that this project will result in a terrestrial model for use in future IPCC simulations. Presented will be early results from offline and partially coupled simulations of these terrestrial biogeochemistry modules with and without land cover change, fossil fuel emissions, and ocean carbon flux forcings over the 19th and 20th centuries.

Research partially sponsored by the 1) Climate Change Research Division (CCRD) of the Office of Biological and Environmental Research (OBER), and 2) Mathematical, Information, and Computational Sciences (MICS) Division of the Office of Advanced Scientific Computing Research (OASCR) within the U.S. Department of Energy's Office of Science (SC). This research used resources of the National Center for Computational Science (NCCS) at Oak Ridge National Laboratory (ORNL) which is managed by UT-Battelle, LLC, for the U.S. Department of Energy under Contract No. DE-AC05-00OR22725. The National Center for Atmospheric Research (NCAR) is operated by the University Corporation for Atmospheric Research (UCAR) and receives research funding primarily from the National Science Foundation (NSF).