Fig. 2
From: The paleoclimatic footprint in the soil carbon stock of the Tibetan permafrost region
Relative importance of paleo- and modern climates in regulating soil carbon stock over the permafrost regions of the Tibetan Plateau based on multiple statistical models. The relative importance matrix includes results from: a Random Forest modelling; b Variation Partitioning modelling; c Structural Equation Modelling (SEM). T, the first principle component of all temperature-related variables; P, the first principle component of all precipitation-related variables. d shows the partial correlation coefficients between SOCD of the top 30 cm layer and mean annual temperature (RSOCD-T) and mean annual precipitation (RSOCD-P) in modern times when none of, each of, and all of the soil property variables were controlled (separated by the vertical broken lines). The soil property variables are clay content (Clay), sand content (Sand), soil pH, total potassium (K), total phosphorus (P) and cation exchange capacity (CEC). *Denotes significant at P < 0.05
