User API

Regridder

util

data

Standard test data for regridding benchmark.

xesmf.data.wave_smooth(lon, lat)

Spherical harmonic with low frequency.

Parameters:
lon, lat2D numpy array or xarray DataArray

Longitute/Latitude of cell centers

Returns:
f2D numpy array or xarray DataArray depending on input

2D wave field

Notes

Equation from [1] [2]:

\[\begin{split}Y_2^2 = 2 + \cos^2(\\theta) \cos(2 \phi)\end{split}\]

References

[1]

Jones, P. W. (1999). First-and second-order conservative remapping schemes for grids in spherical coordinates. Monthly Weather Review, 127(9), 2204-2210.

[2]

Ullrich, P. A., Lauritzen, P. H., & Jablonowski, C. (2009). Geometrically exact conservative remapping (GECoRe): regular latitude–longitude and cubed-sphere grids. Monthly Weather Review, 137(6), 1721-1741.