mesmer.io.load_constant_files.gaspari_cohn¶
- mesmer.io.load_constant_files.gaspari_cohn(r)¶
smooth, exponentially decaying Gaspari-Cohn correlation function
- Parameters
r (np.ndarray) – d/L with d = geographical distance in km, L = localisation radius in km
- Returns
y (np.ndarray) – Gaspari-Cohn correlation function value for given r
Notes
Smooth exponentially decaying correlation function which mimics a Gaussian distribution but vanishes at r=2, i.e., 2 x the localisation radius (L)
based on Gaspari-Cohn 1999, QJR (as taken from Carrassi et al 2018, Wiley Interdiscip. Rev. Clim. Change)