Initialisation 
Monopole:    Bessel monopole of radius 0.5 and strength 4
             centred at (+3,-3)
Tracers:     single tracer point at the centre of the vortex
Computation: domain: X = (-10, ..., 10), Y = (-10, ..., 10)
             no. of grid points from wall to wall: (257, 257)
             boundary conditions: stress-free along all walls 
             standard Arakawa scheme used
             rotation effects: beta = 0.3, gamma = 0
                          and: f0 = 0, +3 or -3
             bottom topography: circular mountain at the origin
                    with a half cosine profile.
                    max. height h_max = 0.4, radius R = 1.5
             solver for streamfunction: NAG
             viscosity: nu = 10^-3 (i.e. Re=1000 at T=0)
             time step: dt = 0.05
             final time: T = 50 

Bessel monopole encounters a circular mountain that the origin:
<=== with f0=0: equatorial case
<=== with f0=+3: northern hemisphere
<=== with f0=-3: southern hemisphere

 
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created: 21 April 1998
last modified: 26 May 2001