On the total geostrophic circulation of the South Pacific Ocean: Flow patterns,tracers and transports

I have used the patterns of tracers (temperature, salinity, oxygen, silica, helium-3) and of density to estimate the geostrophic circulation (baroclinic plus barotropic) of the South Pacific Ocean at all depths. That is, the direction of horizontal flow is determined at all depths in a manner that appears to be consonant with the tracer patterns and that satisfies continuity of mass.Within the upper kilometer the velocity shear is much stronger than at greater depths, and the baroclinic flow field alone is closely consonant with the tracer patterns except near the western boundaries. The barotropic components added to the baroclinic to provide a flow field that matches the tracer patterns in the deeper waters and to achieve continuity are quite small except in the western boundary currents, and only there do they provide a combined flow pattern significantly different from the baroclinic alone.The resulting field of flow has equatorward deep western boundary undercurrents in each of the three basins and a poleward flow along the eastern boundary. A part of the Circumpolar Current follows the southern side of the East Pacific Rise around the Southeast Pacific Basin and then through the Drake Passage. The broad-ocean anticyclonic gyre of the upper waters is broken at depth by the Tonga-Kermadec Ridge and the East Pacific Rise into separate gyres in the Tasman Sea and the central basin, where it extends nearly to the bottom in the north.In the central basin the northward abyssal flow is not confined to the western boundary but extends all across the basin, diverted only slightly in the north by the small deep remnant of the anticyclonic gyre.