Accession Number : ADP002657

Title :   Ventilated and Unventilated Models of the Wind-Driven Circulation,

Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB

Personal Author(s) : Young,W. R.

Report Date : 1983

Pagination or Media Count : 28

Abstract : The quasigeostrophic theory of the wind-driven circulation given by Rhines and Young (1982a) is extended to take account of strong isopycnal displacements. Thus the quasigeostrophic approximation is abandoned. Instead exact solutions of the planetary geostrophic equations which satisfy both horizontal and vertical boundary conditions are presented. It is shown that the planetary geostrophic equations have an infinite number of solutions, all of which satisfy identical boundary conditions. Other physical process, not explicit in the planetary geostrophic equations themselves, must be considered to decide which solutions is relevant to the real ocean. To clearly illustrate this lack of uniqueness two solutions are discussed in detail. The first solution is a development of the model given by Luyten, Pdelosky and Stommel (1982). The second solution is a development of the model given by Rhines and Young (1982a). Both solutions satisfy the same boundary conditions but have qualitativey different flow patterns. It is argued that the latter solution (which is based on the assumption that potential vorticity is homogenized) is more realistic.

Descriptors :   *Ocean currents, Oceans, Eddies(Fluid mechanics), Wind, Density, Symposia

Distribution Statement : APPROVED FOR PUBLIC RELEASE