One ring per year, 1880 to 2025. Radius follows global temperature anomaly on a linear scale; the red ring marks the 1951–1980 average.
NASA GISTEMP v4 land-ocean annual means, stored in 0.01 °C. 146 years. NASA open data with acknowledgment.
Warmer years sit farther out; rings are ordered by temperature, not time. In this snapshot, 2024 is warmest at +1.28 °C. This is not a preindustrial baseline: warming relative to 1850–1900 is roughly 0.2–0.3 °C greater.
Arrows step years; Home/End goes to 1880/2025. With reduced motion, all rings appear at once.
Code: Luke Steuber, MIT. Data Poems.