SPHEREPACK 2.0 is a collection of Fortran programs that facilitates
computer modeling of geophysical processes. The package contains
programs for computing certain common differential operators including
divergence, vorticity, gradients, and the Laplacian of both scalar and
vector functions.
Programs are also available for inverting these
operators. For example, given divergence and vorticity, the package
can be used to compute the velocity components. The Laplacian can also
be inverted and therefore the package can be used to solve both the
scalar and vector Poisson equations.
In addition, the package can be
used to compute a scalar function with a specified gradient. Its use
in model development is demonstrated by a sample program that solves
the time-dependent nonlinear shallow-water equations. Accurate
solutions are obtained via the spectral method that uses both scalar
and vector spherical harmonic transforms that are available to the
user.
The package also contains utility programs for computing the
associated Legendre functions, Gauss points and weights, and multiple
fast Fourier transforms. Programs are provided for both equally spaced
and Gauss distributed latitudinal points as well as programs that
transfer data between these grids.
For further information, contact John Adams (johnad@ucar.edu)
or Paul Swarztrauber (pauls@ucar.edu).
