Extended Data Figure 1: Estimated correlation decay length values.
From: Northern Hemisphere hydroclimate variability over the past twelve centuries
a, The spatial decorrelation function ρ for centennial mean precipitation estimated from the output of the climate model ECHO-G35 over the period 1000–1990, following the procedure described in the Methods for the estimation of the centennial correlation decay length for hydroclimate variability. Distance is the correlation decay length from one point in kilometres. The different colours represent the latitudinal bands. b, An example of the estimated spatial autocorrelation function for centennial mean values of precipitation at latitudes 81.25° N, 80.00° N and 78.75° N, respectively, with the decorrelation length for latitude 80° N indicated in red. c, The simplified CDL function of hydroclimate variability at centennial timescales, derived from panel a, is used throughout the study to calculate the maximum search distances as a function of latitude.
