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Arctic Sea Ice Extent (September) vs US Internet Users

Arctic Sea Ice Extent (September) and US Internet Users correlate at r = -0.84 over 35 years (1990–2024), p < 0.0001. With the time trend removed, r = -0.26. 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 -0.26 — the relationship is probably coincidental, not causal.

Pearson r
-0.84
p-value
< 0.0001
Years compared (n)
35 (1990–2024)
95% confidence interval
-0.92 to -0.71
Correlation with the time trend removed
-0.26

Sources

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Correlation does not imply causation. How the verdict is worked out.