This dataset gives the tree-ring indices for Picea abies at Rothenburg
ob der Tauber, Bavaria, Germany. The chronology represents 20 cores from 10
trees. The series were read in using read.rwl from
package dplR, detrended using a 60a spline with 50% frequency cutoff
(function detrend), and averaged to a chronology using a
robust mean chron.
data(rt_spruce)A data.frame containing tree-ring indices and
replication depth with respective years as rownames.