1998 January 21, pn...@uaa.alaska.edu, Re: Klamath Update -Ron reply, in alt.mining.recreational, Usenet:
We don't have to worry too much about flooding in Alaska during winter months, just the threat of aufice, better known as overflow. When the creek or river freezes to the bottom, that water that continues downstream still seeks a path around the frozen part […]
2003, Chad Kister, Arctic Quest: Odyssey Through a Threatened Wilderness→ISBN, page 26:
Ice sheets extended far out into the river with the current flowing underneath. This aufice occurs when the ice builds up above the rivers, and often stays frozen well into July.