C-axis fabric analysis of ice samples collected from the NEEM ice core

The c-axes orientations are measured on thin ice sections using automated polarized light microscopy. The measured data are stored in form of high-resolution digital images which have been evaluated only manually so far.

The automatic detection of grains and grain boundaries and the extraction of their orientation and shape parameters enable a statistical acquisition of the ice microstructure. The analysis of c-axes distributions, grain sizes, misorientations between adjacent grains, grain boundary orientations etc. allows for conclusions about the active recrystallization mechanisms. This is of high importance for an improved understanding of ice de- formation and ice flow.