Modeling relative frost weathering rates at geomorphic scales

- New bedrock weathering model predicts porosity increases driven by frost cracking.
- Permeability drop with ice formation causes flux gradients that drive cracking/damage.
- Greatest damage occurs at temperatures just cold enough for ice to propagate cracks.
- Climate-dependent median depth for integrated damage within approx. 2 m of surface.
- Model parameters tied to physical properties, allowing for testing across sites.