Southern Tip of Andes Mountains Simulation
This page describes a numerical simulation of the southern tip of the Andes Mountains.
Motivation comes from gravity wave observations by The Southern Argentina Agile Meteor
Radar (SAAMER), Rio Grande on Tierra del Fuego.
Computaion Domain
The mesh is uniform at 500 m spacing covering most of the land mass with range
x [-100,150] km, y [-150,150] km.
Gentle stretching is used in both directions with factor ~2.06% to the boundaries.
The mesh is uniformly spaced at 500 m for
all altitudes in the z direction. In total the mesh contains
700 x 760 x 288 points and sponge layers are used on all external boundaries
in order to absorb outgoing waves.Wind and Thermodynamic Profiles
Winds for this inital simulation were taken from the previous series of Andes simulations.
Andes07
Andes_Resolution
Forcing
Forcing terms gradually introduce winds near the surface with the
objective of achieving the wind profile within a five hour twenty minute period.
A hyperbolic tangent function is used in order to produce gentle
acceleration of the wind near the beginning and end of the forcing period.
The maximum forcing rate is equivalent to that of a linear ramp with a
duration of 80 minutes.