HR: 0800h
AN: OS31A-0567    [Abstracts]
TI: An Implicit Biogeochemistry Ocean Model
AU: * Kwon, E
EM: ekwon@uci.edu
AF: Earth System Science, University of California, Irvine, Croul Hall, Irvine, CA 92697-3100 United States
AU: Primeau, F
EM: fprimeau@uci.edu
AF: Earth System Science, University of California, Irvine, Croul Hall, Irvine, CA 92697-3100 United States
AB: Because of the long ventilation time-scales for the deep ocean, the required spin-up for global ocean carbon-cycle models can be several thousand model years. This makes it difficult to explore the sensitivity of the models to parameters that control the deep biogeochemistry. To overcome this difficulty we have implemented a fully implicit solver for an OCMIP 2 -type biogeochemistry model. The offline model uses the 3-D flow and eddy-diffusion fields obtained from a global OGCM. The equilibrium solutions are solved using an iterative approach based on Newton's method. Computations that would normally take several days using an explicit time-stepping scheme now only take minutes or hours. Here we present some preliminary results obtained using a continuation approach in which model parameters are varied continuously to explore the model sensitivity to those parameters.
DE: 4806 Carbon cycling
DE: 4842 Modeling
DE: 4255 Numerical modeling
DE: 1635 Oceans (4203)
SC: Ocean Sciences [OS]
MN: 2004 AGU Fall Meeting