It is the sound of ice moving in response to the motion of the water beneath. (discovermagazine.com)
The remarkable expansion of open water there last summer was as much a result of old thick ice moving as it was of melting, as I wrote last fall. (dotearth.blogs.nytimes.com)
This is important because, as more ice moves from glaciers on land into the ocean, sea levels rise. (oceanmotion.org)