Extended Data Figure 9: Histograms of cross-correlations with kernel density estimate added.
From: Northern Hemisphere hydroclimate variability over the past twelve centuries

a, Cross-correlations between gridded hydroclimate proxy data and temperature proxy (PT) data. b, Cross-correlations between gridded hydroclimate model data and temperature model data. c, Cross-correlations between gridded hydroclimate proxy (PH) data and hydroclimate model (MH) data. d, Cross-correlations between gridded temperature proxy data and temperature model (MT) data. e, The same as a but Fisher-transformed. f, The same as b but Fisher-transformed. g, The same as c but Fisher-transformed. h, The same as d but Fisher-transformed. The thin curves in each histogram represent the kernel density estimates.