This page describes a numerical simulation of waves generated by winds
blowing over a section of the Southern Andes. The mean winds and temperature
profile are taken from one of Han Li's runs for wintertime at 50 S. These
profiles only extent to an altitude of 140 km so the winds were held fixed
at their values at 140 km for higher altitudes. The temperature profile was
smoothly extended to a maximum temperature of 800 degrees K. The wind,
temperature, and N^2 profiles are shown below.

## Mean wind evolution

Here the winds are initially set to zero from the surface to an altitude of
about 20 km. At this point the wind transitions to the profiles shown in the
plots above. The following plot shows the initial condition.

The mean winds near the surface are increased in time according to the profile shown below. A hyperbolic tangent function is used in order to produce gentle acelleration of the wind near the begininning and end of the forcing period. The maximum forcing rate is equal to that of a linear ramp with duration 4 hours.

The mean winds near the surface are increased in time according to the profile shown below. A hyperbolic tangent function is used in order to produce gentle acelleration of the wind near the begininning and end of the forcing period. The maximum forcing rate is equal to that of a linear ramp with duration 4 hours.