UW-NMS Grid Nesting

There are two nesting options:

1. Multiple two-way nesting.

• Any number of nests may be implemented, using Clark and Farley nesting scheme.
• All inner grids may move along prescribed path or follow a particular feature such as lowest sea level pressure.

2. One way nesting within a specified model or gridded data set may be used for outer boundary condition.

• The outer nest is provided by independent simulation or analysis stored in history files.
• Local fields are temporally interpolated from the "outer" simulation or analysis.
• The outer simulation is incorporated into model by lateral and vertical absorbing layers with specified timescales of relaxation.
• Lateral boundaries may additionally have a radiation condition for fast moving outward propagating waves.