HR: 16:15h
AN: OS52L-08    [PDF]
TI: Introduction of a new global isopyncal model for studies of ocean circulation, biogeochemistry, and climate
AU: * Arbic, B K
EM: arbic@splash.princeton.edu
AF: Program in Atmospheric and Oceanic Sciences, Princeton University, P.O. Box CN710, Sayre Hall, Princeton, NJ 08544-0710
AU: Gnanadesikan, A
AF: Geophysical Fluid Dynamics Laboratory, P.O. Box 308, Princeton, NJ 08542
AU: Hallberg, R W
AF: Geophysical Fluid Dynamics Laboratory, P.O. Box 308, Princeton, NJ 08542
AB: We have developed the Hallberg Isopycnal Model (HIM) into a realistic global model useful for studies of ocean circulation, biogeochemistry, and climate. The negligible diapycnal mixing inherent in isopyncal models is potentially a tremendous advantage over the z-coordinate models usually used in such studies. Mixed layer depths in the bulk mixed layer scheme we use are sensitive to an included parameterization for mixed layer restratification. The model utilizes a fully nonlinear equation of state without any substantial difficulties. We present preliminary results of the physical circulation and tracer distributions in 1 degree simulations. Diagnostics such as rms SST errors with respect to climatologies, and meridional overturning streamfunctions, are comparable to those obtained in z-coordinate models. As shown by age tracers, the HIM simulations form some water masses that are traditionally difficult to form in z-coordinate simulations run at a similar resolution.
DE: 4215 Climate and interannual variability (3309)
DE: 4283 Water masses
DE: 4532 General circulation
DE: 4805 Biogeochemical cycles (1615)
SC: Ocean Sciences [OS]
MN: 2004 Ocean Sciences Meeting