Here in Norway the date 22nd of february is sometimes called Per varmestein. It’s the date when the ice starts to melt. The saying is based on when St. Peter threw hot stones into frozen water so that the ice loosened.
It is still some days left until the 22nd....
But the past weekend in Sweden you could see that the ice had open areas and had started to transform. The crystal structure in the ice changes. Long vertical crystals are formed with poor bonding between the crystals. The crystals become hollow and partly filled with water. The process starts on the surface and works downwards. This ice is called stavis because of the rod-shaped crystals, but is also referred to as spring ice. So lets hope that we will get some cold nights with clear sky the following weeks , because i’m planning to skate much more this winter!
Funny...my name is Per, but i refuse to have Per varmestein as my nickname!