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Arctic Sea Ice Extent (September) vs US Imports

Arctic Sea Ice Extent (September) and US Imports correlate at r = -0.82 over 46 years (1979–2024), p < 0.0001. With the time trend removed, r = -0.32. Interpret with caution.

Verdict: Interpret with caution. Much of the apparent link is driven by a shared time trend: r falls from -0.82 to -0.32 once the trend is removed.

Pearson r
-0.82
p-value
< 0.0001
Years compared (n)
46 (1979–2024)
95% confidence interval
-0.90 to -0.70
Correlation with the time trend removed
-0.32

Sources

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