68°15'N 20°15'E

Reference: Briffa et al., 1992; Briffa et al., 1996

Proxy Type: tree-ring widths

Standardized climate record reflecting surface air temperature. Red indicates temperatures greater than one standard deviation warmer than average for the reference period (1901-1960), whereas dark blue indicates at least one standard deviation colder than this average. All series presented as five-year averages (see paper for more explanation).