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R. M. Samelson

APRILI992 NOTES AND CORRESPONDENCE 431Fluid Exchange across a Meandering Jet* R. M. SAMELSONWoods Hole Oceanographic Institution, Woods ~lole, Massachusetts13 May 1991 and 31 July 1991ABSTRACT The motion of fluid parcels in a two-dimensional kinematic model of a meandering jet is investigated usingMelnikov's method. The study is motivated by a recent analysis of float trajectories in the

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Joanna E. Muench and Eric Kunze

1. Introduction Some basic characteristics of the Pacific equatorial deep jets are well established ( Firing 1987 ; Ponte and Luyten 1989 ; Muench et al. 1994 ). The jets form vertically alternating layers of ±5 cm s −1 zonal flow with vertical wavelengths of 300–500 m straddling ±2° of the equator. They span the depth range 500–3000 m, insulated from the surface by the Equatorial Undercurrent and the main pycnocline. In the Pacific, where they have been best measured, they are zonally

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David Marshall and John Marshall

1018 JOURNAL OF PHYSICAL OCEANOGRAPHY VOLUMl~22Zonal Penetration Scale of Midlatitude Oceanic Jets DAVID MARSHALL* AND JOHN MARSHALL*Center for Meteorology and Physical Oceanography, Department of Earth, Atmospheric, and Planetary ~ciences, Massachusetts Institute of Technology, Cambridge, Massachusetts (Manuscript received 2 April 1991, in final form 19 November 1991

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Ilson C. A. da Silveira and Glenn R. Flierl

1. Introduction Contour dynamics (CD) provides a useful framework for the investigation of the nonlinear dynamics of quasigeostrophic (QG) jets. As discussed in Stern and Pratt (1985) , geophysical jets are usually associated with potential vorticity (PV) fronts (i.e., a front separating regions of significantly different PV values), for which a step function is a reasonable approximation. The CD method, based on PV conservation, consists exactly of solving initial value problems for piecewise

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Michael A. Spall, Robert S. Pickart, Paula S. Fratantoni, and Albert J. Plueddemann

of the eastward-flowing shelfbreak jet, which is now known to exist. Historical measurements have revealed that Pacific-origin waters flow along the southern edge of the Canada Basin (e.g., Mountain et al. 1976 ; Aagaard 1984 ). Recent observations, including those from the western Arctic shelf–basin interactions (SBI) program, have elucidated this circulation. For example, it is now known that, in the absence of strong winds, an eastward-flowing boundary current exists along the edge of both

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L. D. Talley

DECEMBER 1983 L.D. TALLEY 2161Radiating Instabilities of Thin Baroclinic Jets L. D. TALLEYSchool of Oceanography, Oregon State University, Corvallis, OR 97331(Manuscript received 14 January 1983, in final form 4 August 1983)ABSTRACT The linear stability of thin, quasi-geostrophic, two-layer zonal jets on the/8-plane is considered. The meridionalstructure of the jets is

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Michael A. Spall

strength of the ageostrophic circulations, after several instability cycles these unforced fronts tend to evolve toward a baroclinic zone that is dominated by large amplitude eddies rather than a strong coherent jet, as was assumed for the initial state. This is often in contrast to the observed lifetimes of open ocean fronts that can greatly exceed the linear growth timescale. It will be shown here that the presence of a large-scale deformation field can maintain a strong baroclinic jet for long times

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Steven R. Jayne and Nelson G. Hogg

form drag resulting from baroclinic instability in the westward moving Sverdrup flow ( Rhines and Holland 1979 ), to more direct driving by eddies in the jet, itself (e.g., Haidvogel and Rhines 1983 ; Cessi et al. 1987 ; Spall 1994 ; Jayne et al. 1996 ). In a recent paper ( Jayne et al. 1996 ) we reported on a series of numerical experiments with a barotropic, quasigeostrophic, β -plane model that combines features of both the inertial and direct eddy forcing schools of thought. Entering from

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Shenn-Yu Chao

VOLUME 15 JOURNAL OF PHYSICAL OCEANOGRAPHY APRIL 1985Coastal Jets in the Lower Atmosphere SHENN-YU CHAOHorn Point Environmental Laboratories, University of Maryland, Cambridge, MD 21613(Manuscript received 3 April 1984, in final form 7 January 1985) ABSTRACT Lowqevel winds over land-ocean boundaries are generally alongshore. Two types of forcing that generatealongshore jets in

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David C. Smith IV and George P. Davis Jr.

JULY 1989 DAVID C. SMITH IV AND GEORGE P. DAVIS, JR. 975A Numerical Study of Eddy Interaction with an Ocean Jet DAVID C. SMITH IV AND GEORGE P. DAVIS, JR.Department of Oceanography, Naval Postgraduate School Monterey, California(Manuscript receivexi 20 June 1988, in final form 13 February 1989)ABSTRACT Gulf Stream rings exhibit a number of propagation tendencies after their release from the current. Amongthose

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