I’ve been looking at ice at the nanoscale for a while, and it’s crazy how those tiny hexagonal lattice changes can ripple out into the macroscopic flow of a glacier. If your charts show a shift, it might be a subtle alteration in the crystal orientation or a new defect density—both of which can change the friction and, eventually, the glacier’s path. Keep an eye on the defect concentration, and try correlating it with the local strain rates; that could give you a clear link between the micro and the mega.