mesmer.io.load_constant_files.gaspari_cohn

mesmer.io.load_constant_files.gaspari_cohn(r)

Computes the smooth, exponentially decaying Gaspari-Cohn correlation function for a given r.

Parameters

r (float) – 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., 2x the localisation radius (L)

  • based on Gaspari-Cohn 1999, QJR (as taken from Carrassi et al 2018, Wiley Interdiscip. Rev. Clim. Change)