Fig. 2: Correlation matrix (Pearson correlation coefficient, r) of continuous explanatory variables in different glacier environments.

a, Surge-type environment. b, Land-terminating environment. c, Marine-terminating environment. d, All datapoints regardless of the glacier environment. Cells with insignificant P values (the probability of obtaining a correlation coefficient as large or larger than we observed by chance if the true correlation was zero (the null hypothesis)) are marked with X at a significance threshold of 0.05. Variables are ordered based on similarity following hierarchical cluster analysis with the complete linkage method. Max., maximum; med., median; precip., precipitation; slid., sliding; surf., surface; temp., temperature; vel., velocity.