Fig. 3: Spectral estimates of land temperature as a function of sub-decadal variability.
From: Millennial-scale climate variability over land overprinted by ocean temperature fluctuations
a, PSD estimates of the instrumental temperature (Δt < 60 years) and of the pollen-based reconstructions (Δt > 100 years) binned according to sub-decadal instrumental variability (Methods and Extended Data Fig. 7c,d); logarithmically spaced axes were used. Shading indicates 90% confidence intervals around the mean. b, Relationship of the instrumental sub-decadal temperature variability PSD2–10 years and the pollen-based millennial temperature variability PSD1,000–3,000 years. Vertical and horizontal lines indicate the standard error of the mean within each bin. c, As in b, but between β10–60 years and PSD1,000–3,000 years.
