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Atmospheric CO₂ (Mauna Loa) vs Sunspot Number
Atmospheric CO₂ (Mauna Loa) and Sunspot Number correlate at r = -0.21 over 67 years (1959–2025), p = 0.081. With the time trend removed, r = -0.02. Not statistically significant.
Verdict: Not statistically significant. With n = 67, this correlation isn't statistically significant (p = 0.081). It could easily be chance.
- Pearson r
- -0.21
- p-value
- 0.081
- Years compared (n)
- 67 (1959–2025)
- 95% confidence interval
- -0.43 to 0.03
- Correlation with the time trend removed
- -0.02
Sources
- Atmospheric CO₂ (Mauna Loa) (ppm): NOAA GML. Annual mean atmospheric carbon dioxide measured at Mauna Loa Observatory, Hawaii (NOAA GML).
- Sunspot Number (yearly mean): SILSO. Yearly mean total sunspot number (SILSO, Royal Observatory of Belgium).
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.