windspharm

windspharm is a Python package for performing computations on global wind fields in spherical geometry. It provides a high level interface for computations using spherical harmonics. windspharm is capable of computing the following quantities from an input vector wind:

divergence

vorticity (relative and absolute)

streamfunction

velocity potential

irrotational and non-divergent components of the wind (Helmholtz decomposition)

vector gradient of a scalar function

triangular truncation of a scalar field

magnitude (wind speed)