CorrelateAI › Pairs
Arctic Sea Ice Extent (September) vs US Urban Population
Arctic Sea Ice Extent (September) and US Urban Population correlate at r = -0.84 over 47 years (1979–2025), p < 0.0001. With the time trend removed, r = -0.14. 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 -0.14 — the relationship is probably coincidental, not causal.
- Pearson r
- -0.84
- p-value
- < 0.0001
- Years compared (n)
- 47 (1979–2025)
- 95% confidence interval
- -0.91 to -0.73
- Correlation with the time trend removed
- -0.14
Sources
- Arctic Sea Ice Extent (September) (million km²): NSIDC. Mean Arctic sea ice extent in September, the yearly minimum (NSIDC Sea Ice Index).
- US Urban Population (% of total): World Bank. US Urban Population (World Bank indicator SP.URB.TOTL.IN.ZS).
Related pairs
- US Rural Population vs US Urban Population (r = -1.00)
- US Population vs US Urban Population (r = +0.97)
- US Adult Obesity vs US Urban Population (r = +0.95)
- US Median Age vs US Urban Population (r = +0.95)
- US Electricity Generation vs US Urban Population (r = +0.95)
- US Life Expectancy vs US Urban Population (r = +0.95)
Correlation does not imply causation. How the verdict is worked out.