smooth, exponentially decaying Gaspari-Cohn correlation function


r (np.ndarray) – d/L with d = geographical distance in km, L = localisation radius in km


y (np.ndarray) – Gaspari-Cohn correlation function value for given r


  • 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)