CorrelateAI › Pairs
Arctic Sea Ice Extent (September) vs US Population
Arctic Sea Ice Extent (September) and US Population correlate at r = -0.90 over 47 years (1979–2025), p < 0.0001. With the time trend removed, r = -0.28. Likely spurious (shared time trend).
Verdict: Likely spurious (shared time trend). Both series mostly just trend over time. After removing that trend the correlation collapses to -0.28 — the relationship is probably coincidental, not causal.
- Pearson r
- -0.90
- p-value
- < 0.0001
- Years compared (n)
- 47 (1979–2025)
- 95% confidence interval
- -0.94 to -0.83
- Correlation with the time trend removed
- -0.28
Sources
- Arctic Sea Ice Extent (September) (million km²): NSIDC. Mean Arctic sea ice extent in September, the yearly minimum (NSIDC Sea Ice Index).
- US Population (people): World Bank. US Population (World Bank indicator SP.POP.TOTL).
Related pairs
- US Adult Obesity vs US Population (r = +1.00)
- Atmospheric CO₂ (Mauna Loa) vs US Population (r = +0.99)
- US Resident Patent Applications vs US Population (r = +0.98)
- US Median Age vs US Population (r = +0.98)
- US Cereal Yield vs US Population (r = +0.97)
- US GDP per Capita vs US Population (r = +0.97)
Correlation does not imply causation. How the verdict is worked out.