pvtend.d_dphi
- pvtend.d_dphi(field: ndarray, dphi: float) ndarray[source]
Meridional derivative in angular coordinates ∂f/∂φ.
Matches LOG20
d_dphi.m: centred differences in the interior, 3-point one-sided stencils at the polar boundaries.- Parameters:
field – 2-D
(nlat, nlon)or 3-D(nlev, nlat, nlon).dphi – Meridional grid spacing in radians.
- Returns:
Same shape, in
[field_units / radian].