Spatial inter-station decorrelation within CRS1 (Region NE) for the seven climate elements present in HISTALP for January and July respectively. Vertical axes: Spearman's correlation coefficient, horizontal axes: distance in km, boxes: medians, 75 and 25 percentiles, whiskers: 10 and 90 percentiles of interstation-distance subgroups, lines: exponential decorrelation fits (calculated from the grouped dataset) (from Auer et al. 2007)