Extended Data Table 3.

Overlap statistics

For each pair of old (ending in the early-to-mid 1990s) and new (reaching 2011) records at the same site, the table lists the time interval with overlapping data, the standard error (SE) within the overlap interval for the old and new records, respectively, the mean difference of the records, and their correlation. Standard error, mean difference and correlation are given depending on the length of the running mean filter window used to smooth the data. For ‘stack’, the record pair consists of stacking all old and all new records separately.