The fluid is exponentially stratified and initially at rest. The initial
density field has the form,
where z is the vertical coordinate, and 
m, and
is a reference density field. Here a constant density, 1000 kg m
has been subtracted for the error reduction. Following Beckmann and
Haidvogel (1993) and McCalpin (1994), we subtract the mean density field
before integrating the density field to obtain pressure
from the hydrostatic equation.
The density anomaly, 
indicates that the initial condition of
the model was slightly less stably stratified than the reference field for
each computation. In this study, the density anomaly varies from 0.1-1 kg
m