Scientific Development of a Massively Parallel Ocean Climate Model
Semtner, Albert J. Jr.
Chervin, Robert M.
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During the second year of CHAMMP funding to the PIs, progress has been made in the proposed areas of research, as follows: Investigation of the Physics of the Thermohaline Circulation Major numerical experiments were conducted to investigate the sensitivity of global ocean circulation and its associated transports of heat and salt to changes in high-latitude buoyancy forcing and in wind forcing. An experiment had been designed to improve the continued production of water masses in areas of known deep-water formation. At the same time, almost all of the deep and abyssal regions of the world ocean were free from earlier restoring to observed values of temperature and salinity. This •convective forcing' experiment was run on the National Center for Atmospheric Research (NCAR) Y-MP/864 for two additional years to complete a five-year sensitivity study. A suite of analysis programs, already converted to run on the NCAR Unix-based computers, was applied in order to make comparisons with published results of the earlier experiment (Semtner and Chervin, 1992). The outcome was an improved representation of the global thermohaline circulation, as well as enhanced levels of eddy energy, particularly in the deep and abyssal waters. The results were dramatically illustrated in a two-hour videotape of temperature, salinity, surface height, and particle trajectories, in basin-by-basin closeups, as produced at the Naval Postgraduate School (NPS) by Shirley lsakari and Michael McCann. This "Video Atlas of Global Ocean Circulation" was distributed upon request to over 100 scientists throughout the world. Additional quantitative results are being prepared for publication by Semtner and Chervin.
Progress· Report for 1992-93 and Continuing Request• for 1993-94This progress report and continuing request are being submitted in nearly identical form by each of the Co-Principal Investigators, but involving a separate budget from each investigator's home institution.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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Semtner, Albert J. Jr.; Chervin, Robert M. (American Geophysical Union, 1992);A concerted effort has been made to simulate the global ocean circulation with resolved eddies, using a highly optimized model on the best available supercomputer. An earlier 20-year spin-up has been extended for 12.5 ...
Stammer, Detlef; Tokmakian, Robin; Semtner, Albert; Wunsch, Carl (1996-11);Numerical high-resolution ocean general circulation models have experienced a revolutionary development during the last decade. Today they are run globally in realistic configuration with realistic surface boundary ...
McCann, M.P.; Semtner, A.J. Jr.; Chervin, R.M. (Springer, 1994);The results from an integration of a global ocean circulation model have been condensed into an analysis of the volume, heat, and salt transports among the major ocean basins. Transports are also broken down between the ...