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Arctic Sea Ice Extent (September) vs Sunspot Number
Arctic Sea Ice Extent (September) and Sunspot Number correlate at r = +0.36 over 47 years (1979–2025), p = 0.012. With the time trend removed, r = +0.06. Holds up after detrending.
Verdict: Holds up after detrending. Statistically significant (p = 0.012) and the association survives trend removal (detrended r = 0.06). Correlation still isn't causation, but this one isn't an obvious artifact.
- Pearson r
- +0.36
- p-value
- 0.012
- Years compared (n)
- 47 (1979–2025)
- 95% confidence interval
- 0.08 to 0.59
- Correlation with the time trend removed
- +0.06
Sources
- Arctic Sea Ice Extent (September) (million km²): NSIDC. Mean Arctic sea ice extent in September, the yearly minimum (NSIDC Sea Ice Index).
- Sunspot Number (yearly mean): SILSO. Yearly mean total sunspot number (SILSO, Royal Observatory of Belgium).
Related pairs
- Arctic Sea Ice Extent (September) vs US Mobile Subscriptions (r = -0.92)
- Arctic Sea Ice Extent (September) vs US Resident Patent Applications (r = -0.91)
- Arctic Sea Ice Extent (September) vs US Adult Obesity (r = -0.91)
- Arctic Sea Ice Extent (September) vs US Population (r = -0.90)
- Arctic Sea Ice Extent (September) vs US Marriage Rate (r = +0.90)
- Atmospheric CO₂ (Mauna Loa) vs Arctic Sea Ice Extent (September) (r = -0.89)
Correlation does not imply causation. How the verdict is worked out.