NP3	Geophysical turbulence and diffusion
		.1	Gravity waves in the atmosphere and ocean

Convener: Staquet, C.
Co-Convener(s): Maas, L.
Monday, 19 April 1999
Lecture Room: Paulus Potterzaal 2
Chairperson: N.N.

08:30	SHERWIN, T.J.
		Towards understanding the cause of some very large non-linear waves
		on the Portuguese shelf - an insight into internal tide generation
		(Solicited Paper)

09:00	GERKEMA, T.
		Stokes drift in internal-tide beams

09:15	NEW, A.L.; ESTEBAN, M.; PINGREE, R.D.
		Internal solitary waves in the Bay of Biscay and resulting
		from a new Korteweg-de Vries type theory

09:30	VOISIN, B.; HUERRE, G.
		The trapping of lee waves

09:45	VOISIN, B.
		Added mass for motion in stratified fluids

10:00	MAAS, L.
		Mean flow generation by geometrically focused gyroscopic waves

10:15	DAUXOIS, T.; YOUNG, W.R.
		Near-critical reflection of internal waves

10:30	BREAK

Chairperson: N.N.

11:00	MÜLLER, P.; LIU, X.
		Scattering of internal waves at finite topography
		in two dimensions (Solicited Paper)

11:30	BÜHLER, O.
		On the vorticity transport due to dissipating or breaking gravity waves

11:45	EIFF, O.S.
		Tubulence measurements of breaking lee waves

12:00	BREAK

12:00	Lecture by O. Ashford on "The Life and Work
		of L.F. Richardson" in Jan Steenzaal

Chairperson: N.N.

14:30	READ, P.L.
		Balanced and unbalanced motion in rotating, stratified flow
		in the laboratory (Solicited Paper)

15:00	HOLFORD, J.M.; LINDEN, P.F.
		Rossby adjustment of a two-layer fluid

15:15	BECKERS, M.; VERZICCO, R.; CLERCX, H.J.H.; VAN HEIJST, G.J.F.
		Cyclostrophic balance of axisymmetric vortices in a stratified fluid

15:30	KOUDELLA, C.; STAQUET, C.
		Extremal states of Hamiltonian dynamical systems:
		application to a perfect three-dimensional Boussinesq flow

15:45	FINCHAM, A.M.; PRAUD, O.
		Balanced vortex structures in stratified fluids

16:00	VAN DE KONIJNENBERG, J.A.; STENUM, B.; JUUL RASMUSSEN, J.
		The shallow-water approximation versus the Taylor-Proudman
		theorem in a curved geometry

16:15	NEZLIN, M.V.; RYLOV, A.YU.; TITISHOV, K.B.; CHERNIKOV, G.P.
		Nonlinear beta-effect on the parabolic "beta-plane"

16:30	FLOR, J.-B.
		Wave-vortex interactions in a rotating stratified fluid

16:45	HUERRE, G.; STAQUET, C.
		Interaction of inertial gravity waves with a dynamical barrier

17:00	END OF SUB-SESSION

17:00	Opening, Society Lecture & Reception