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Joseph Pedlosky

OCTOBER 1991 JOSEPH PEDLOSKY 1553The Link between Western Boundary Currents and Equatorial Undercurrents* JOSEPH PEDLOSKYDepartment of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts(Manuscript received 26 September 1990, in final form 14 March 1991) ABSTRACT A constant potential vorticity model is used to investigate

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J. Verron and E. Blayo

physical issue here is to adequately represent the dynamical effect of the viscous boundary layerthrough the production of adverse vorticity at the coast. It is shown that the accuracy in the numerical evaluationof the boundary vorticity may influence the separation latitude of western boundary currents. Several numericalschemes for the no-slip boundary condition are investigated, including one specifically derived from simpleboundary-layer theory. This simple analytical model can actually be seen as a

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Ryusuke Masunaga, Hisashi Nakamura, Bunmei Taguchi, and Takafumi Miyasaka

1. Introduction The midlatitude western boundary currents, which flow poleward along the western flank of each of the ocean basins, transport an enormous amount of heat from the tropics, releasing it into the midlatitude atmosphere in the form of turbulent sensible heat flux (SHF) and latent heat flux (LHF) while maintaining relatively warm sea surface temperature (SST) along their axes. The midlatitude oceanic frontal zones, which are characterized by steep gradients in SST along the poleward

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David J. Webb

-type 1 western boundary current dominated by bottom friction. However, bottom friction is unlikely to be involved because the depth is too great (1400 m at the current maximum and increasing rapidly offshore) and there is additional evidence for a countercurrent at 1000 m. Bottom friction also cannot explain the current maximum. A current maximum can be produced by a Munk-type western boundary current theory using constant horizontal viscosity. However, as shown in Fig. 1 , if the Munk solution is

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G. T. Csanady

462 JOURNAL OF PHYSICAL OCEANOGRAPHY VOLUME 19Energy Dissipation and Upwelling in a Western Boundary Current G. T. CSANADYOld Dominion University, Department of Oceanography, Norfolk, Virginia(Manuscript received 6 June i .988, in final form 26 September 1988) ABSTRAC'F Energy dissipation in a we~ern boundary current begins with the conversion of mean potential

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S. L. Ypma, M. A. Spall, E. Lambert, S. Georgiou, J. D. Pietrzak, and C. A. Katsman

studies characterize the marginal sea by a motionless interior and a single buoyant boundary current. They have proven to give reasonable predictions for water mass properties in marginal seas like the Labrador Sea. Furthermore, the analytical frameworks developed in these studies have increased the understanding of the role of eddies and topography on the dynamics in these regions and they provide means to interpret projections from climate models and observed changes in the past. The comparison

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Koji Shimada and Atsushi Kubokawa

1. Introduction Many currents flow along coastal boundaries. These currents have both negative and positive vorticity, being usually unstable and affected by waves or eddylike disturbances. Large amplitude unstable waves have been observed in infrared images from satellites and ice pack ladder observations. Some waves exhibit a regular wave train with crests breaking on the upstream side (e.g., Ohshima and Wakatsuchi 1990 ; Wakatsuchi and Ohshima 1990 ), while others display mushroomlike

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Pierre Welander

NOVEMBER 1983 NOTES AND CORRESPONDENCE 2117NOTES AND CORRESPONDENCESimilarity Solution for a Stratified Inertial Boundary Current~ PIERRE WELANDER School of Oceanography, University of Washington, Seattle, WA 98195 13 June 1983 and 18 July 1983 ABSTRACT A continuously stratified inertial boundary current in a/5-plane possesses a

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David Y. Lai

1488 JOURNAL OF PHYSICAL OCEANOGRAPHY VOLUME 14Mean Flow and Variabilities in the Deep Western Boundary Current DAVID Y. LA~Graduate School of Oceanography. University of Rhode Island, Narragansett, R! 02882(Manuscrpt received i7 August 1983, in final form ! 1 June 1984) The Deep Western Boundary Curr~nt (DWBC or Western Boundary Un.dercurrent) was observed for over100 days by an L-shaped array

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P. C. F. van der Vaart and W. P. M. de Ruijter

1. Introduction Western boundary currents (WBCs) are dominant features in the world oceans. Here the stability of such currents will be investigated with special emphasis on the Agulhas Current off South Africa. A key feature of the Agulhas is that it establishes a link in the global thermohaline circulation as it exports properties, like salt and heat, from the Indian to the Atlantic Ocean [see De Ruijter et al. (1999a) for a review]. The Agulhas Current can be divided into two regions

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