Assertion: glacier's water | /r/CapableOf | percolate through the firn column
Facets:
Source sentences:
text: Liquid water from melt and rain percolates through the firn column, and is either held as irreducible water or refreezes, progressively reducing pore space from bottom to top layers until the entire firn column turns into ice (900 kg m−3) and no additional water can be stored.