O LR (I 987) 34 (11) A. Physical Oceanography 933

associated velocities of ~0.2 m s ~. After an inertial period, geostrophic adjustment turns the circulation into a large-scale horizontal cyclonic gyre. Boundary friction effects on advancing gravity currents are also evident. School of Earth Sci., Flinders Univ., Bedford Park, SA 5042, Australia.

87:6139 Samolyubov, B.I., 1986. Turbulent diffusion in local

shear layers in a stratified near-bottom current with suspended particles. Izv. A tmos. Ocean Phys. (a translation of Fiz. Atmos. Okeana), 22(5):389- 397.

The diffusion of particles in a polydispersive sus- pension and its relationship with the velocity field in turbidity clouds are studied at the levels for local shear layers in the suspension current. Analyzed are results on velocity fields and the concentration of suspension particles in the suspension current. Moscow State Univ., USSR.

87:6140 Svendsen, I.A., 1987. Analysis of surf zone turbu-

lence. J. geophys. Res., 92(C5):5115-5124.

Measurements of turbulent kinetic energy k under surf zone waves are analyzed to show how k varies over depth, between breaker point and shoreline, and depends on the beach slope. The variation of k over depth is remarkably weak, large values being measured a few percent of the depth above the bottom. A simple model for the dissipation mech- anism makes it possible to derive an empirical formula for the time-averaged k that accurately describes all the data considered reliable. Inst. of Hydrodynamics and Hydraulic Engng, Tech. Univ., Lyngby, Denmark.

87:6141 Treguier, A.M. and B.L. Hua, 1987. Oceanic quasi-

geostrophic turbulence forced by stochastic wind fluctuations. J. phys. Oceanogr., 17(3):397-411.

The quasi-geostrophic response to stochastic wind fluctuations is calculated using a doubly periodic nonlinear model, with a vertical resolution of three modes in most cases. The influence of various parameters on the response is investigated: space and time scale of the forcing, stratification, bottom friction and fl-effect. One aim of this study is to understand the influence of nonlinear transfers; therefore most simulations are situated in a param- eter range where nonlinearities are important. IFREMER, Centre de Brest, BP 337, 29273 Brest Cedex, France.

87:6142 Woods, John, Harry Leach and Peter Minnett, 1981.

The GATE Lagrangian batfish experiment: sum- mary report. Ber. Inst. Meeresk. Christian- Albrechts-Univ., 88:170pp.

Thirteen quasi-Lagrangian box-surveys were carried out as part of the GATE Experiment with a CTD mounted in a batfish towed body. The experiment, data acquisition and data processing are described; uncertainties in the data are estimated and a selection of standard products from the data set are presented and described. Isopycnic analysis showed that thermohaline and dynamic structures with scales comparable to those of mesoscale fronts were present. Inst. fur Meereskunde, Dusternbrooker Weg 20, D-2300 Kiel 1, FRG.

A300. Fluid mechanics

87:6143

Churilov, S.M. and I.G. Shukhman, 1986. Evolution of initial perturbations in an unstably stratified shear flow. Izv. Atmos. Ocean Phys. (a translation of Fiz. Atmos. Okeana), 22(5):409-411.

It is shown that an unstably stratified shear flow is actually unstable for all k; however, the asymptotic dependence of the perturbation amplitude on time in the region k2>k2(Jo) is not purely exponential. Siberian Inst. of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, USSR.

87:6144 Crisciani, Fulvio, 1986. A note about the barotropic-

baroclinic energy transfer equation for oceanic flows. Boil. Oceanol. teor. appl., 4(4):211-218.

Some aspects of the mechanism governing the barotropie-baroclinic instability in geophysical flows are described by the kinetic energy transfer equation. One form of this equation is sometimes deduced in the standard literature in an unconvincing way. In this paper we focus on the criticizable points of such a method and propose a revised equation for oceanic flows, lstituto Sperimentale Talassografico, C.N.R. Trieste, Italy.

87:6145 Cushman-Roisin, Benoit, 1987. Exact analytical

solutions for elliptical vortices of the shallow- water equations. Tellus, 39A(3):235-244.

Shallow-water equations in a rotating framework admit exact solutions for which velocity components are linear and height field is quadratic in the coordinate variables. The resulting 12 coefficients