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Figure 18: Difference in near-surface air temperature (current minus natural landscape) using a 9-point spatial filter for easier visibility. Contour intervals are 0.5, 1.0, 1.5, and 3.0 deg C. Light shading represents the 90% significance level for a 1-sided t-test. Dark shading represents the 95% significance level (from Chase et al. 2000).
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