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Atmospheric CO₂ (Mauna Loa) vs Global Temperature Anomaly
Atmospheric CO₂ (Mauna Loa) and Global Temperature Anomaly correlate at r = +0.97 over 67 years (1959–2025), p < 0.0001. With the time trend removed, r = +0.63. Holds up after detrending.
Verdict: Holds up after detrending. Statistically significant (p = < 0.0001) and the association survives trend removal (detrended r = 0.63). Correlation still isn't causation, but this one isn't an obvious artifact.
- Pearson r
- +0.97
- p-value
- < 0.0001
- Years compared (n)
- 67 (1959–2025)
- 95% confidence interval
- 0.95 to 0.98
- Correlation with the time trend removed
- +0.63
Sources
- Atmospheric CO₂ (Mauna Loa) (ppm): NOAA GML. Annual mean atmospheric carbon dioxide measured at Mauna Loa Observatory, Hawaii (NOAA GML).
- Global Temperature Anomaly (°C vs 1901–2000): NOAA NCEI. Annual global land and ocean surface temperature departure from the 1901–2000 average (NOAA NCEI).
Related pairs
- Atmospheric CO₂ (Mauna Loa) vs US GDP per Capita (r = +0.99)
- Atmospheric CO₂ (Mauna Loa) vs US Population (r = +0.99)
- Atmospheric CO₂ (Mauna Loa) vs US GDP (current US$) (r = +0.98)
- Atmospheric CO₂ (Mauna Loa) vs US Cereal Yield (r = +0.98)
- Atmospheric CO₂ (Mauna Loa) vs Atmospheric Methane (global) (r = +0.98)
- Atmospheric CO₂ (Mauna Loa) vs US Adult Obesity (r = +0.98)
Correlation does not imply causation. How the verdict is worked out.