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Here is a video of a large ice floe (~70x140m) moving visibly back and forth within a ~30cm range at ~1cm/s. The floe covers only half of the lake, but that almost completely, except a ~1m wide strip at the shore. At the end of the movie the camera pans to show the size of the floe.
What causes this movement? The ice is melting and probably quite thin. But still, the floe must weight tons. I think it can only move, when the water moves too. Is there some slow wave mechanics caused by wind pressure on the ice?
https://www.youtube.com/watch?v=6dRe_TFKt84
What causes this movement? The ice is melting and probably quite thin. But still, the floe must weight tons. I think it can only move, when the water moves too. Is there some slow wave mechanics caused by wind pressure on the ice?
https://www.youtube.com/watch?v=6dRe_TFKt84