Figure 6
From: Convergence of soil nitrogen isotopes across global climate gradients

Patterns of soil clay concentrations with climate.
Relationships between (A) mean annual temperature (MAT) and (B) mean annual precipitation (MAP) vs. clay concentrations of surface mineral soils. log (%Clay) = −0.84 + 0.016 × MAT + 0.55 × log(MAP); r2 = 0.47, P < 0.001, n = 359. All points represent soil values averaged to 0.1° latitude and longitude.