CorrelateAI › Pairs
Atmospheric CO₂ (Mauna Loa) vs Atmospheric Methane (global)
Atmospheric CO₂ (Mauna Loa) and Atmospheric Methane (global) correlate at r = +0.98 over 42 years (1984–2025), p < 0.0001. With the time trend removed, r = +0.32. Interpret with caution.
Verdict: Interpret with caution. Much of the apparent link is driven by a shared time trend: r falls from 0.98 to 0.32 once the trend is removed.
- Pearson r
- +0.98
- p-value
- < 0.0001
- Years compared (n)
- 42 (1984–2025)
- 95% confidence interval
- 0.96 to 0.99
- Correlation with the time trend removed
- +0.32
Sources
- Atmospheric CO₂ (Mauna Loa) (ppm): NOAA GML. Annual mean atmospheric carbon dioxide measured at Mauna Loa Observatory, Hawaii (NOAA GML).
- Atmospheric Methane (global) (ppb): NOAA GML. Global annual mean atmospheric methane from marine surface sites (NOAA GML).
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 Methane (global) vs US Natural Gas Consumption (r = +0.98)
- Atmospheric Methane (global) vs US GDP per Capita (r = +0.98)
- Atmospheric CO₂ (Mauna Loa) vs US Cereal Yield (r = +0.98)
Correlation does not imply causation. How the verdict is worked out.