1220 · CO₂ and temperature

CO₂ 283.29 ppm · 56.6 °F / 13.7 °C.

Calculated absolute global surface-temperature estimate.

published 20-year ice-core/firn spline

proxy reconstruction

April–March in file; May–April in catalog; discrepancy unresolved

Annual snapshot at ten-year intervals, not a ten-year mean.

Calculation: source anomaly + the published 14.0 °C reference; °F = °C × 1.8 + 32. Absolute-reference uncertainty is additional to the reconstruction uncertainty.

Sources and Records

1. LAW DOME
2. PAGES2K
3. Met Office — absolute global annual temperature reference — FAQ: actual temperatures; Jones et al. (1999), 1961–1990 global annual average 14.0 °C

AI generated report by Explorvia.com.