pydda.initialization.make_test_divergence_field

pydda.initialization.make_test_divergence_field(Grid, wind_vel, z_ground, z_top, radius, back_u, back_v, x_center, y_center)[source]

This function makes a test field with wind convergence at the surface and divergence aloft.

This function makes a useful test for the mass continuity equation.

Parameters:

Grid: Py-ART Grid object

This is the Py-ART Grid containing the coordinates for the analysis grid.

wind_vel: float

The maximum wind velocity.

z_ground: float

The bottom height where the maximum convergence occurs

z_top: float

The height where the maximum divergence occurrs

back_u: float

The u component of the wind outside of the area of convergence.

back_v: float

The v component of the wind outside of the area of convergence.

x_center: float

The X-coordinate of the center of the area of convergence in the Grid’s coordinates.

y_center: float

The Y-coordinate of the center of the area of convergence in the Grid’s coordinates.

Returns:

u_init, v_init, w_init: ndarrays of floats

Initial U, V, W field