I was reading the story of the Diptheria epidemic that hit Nome, Alaska in the 1920's. The dogsledders were traveling in temperatures down to -60 without the windchill. These guys were all very experienced. One guy was afraid of going across a small bay like area, fearing that it might break off and float out to sea. At -60!!!
Probably none.
Do ice flows ever start without melting ice?
Of course.
Google icebergs and hunt around. Icebergs are formed from glacier flows and other ice already on the ground that gets compressed and squeezed out by additional ice and snow accumulation. At first the ice may form a shelf and then eventually break under the force of its accumulating weight. Icebergs are not formed by rain, except rain that might freeze on contact with existing ground ice, and so become more ground ice. Ice floating to lower latitude is NOT an indication of warming. Duh!
ML/NJ