Water does not freeze in silence. Sonic booms flush invisible ripples underneath what appears to be a suitable dance floor for Ginger and Fred. A drop of 10 degrees to 8, or lower, causes the ice to shift and buckle in a rumbling dance in deep layers of ice beneath where we stand. The booms echo across the stillness of what was once our boisterous, nautical, summer playground. The water is hard, thick, slick and solid; impossible to penetrate with a scratch of a stick or a rock.  What appears to be cracks here are just more layers of ice. A solid window down into the underground-aquatic world of algae…