Pancake ice cream
As a pancake (engl. Pancake Ice ) or Telle rice a is ice type referred to, which consists mainly circular ice pieces with a diameter of 30 cm is to 3 m.
The initial sea ice type consists of what is known as Frazil ice , these are ice needles that are formed on the ocean surface. As the freezing process continues, the ice needles combine to form flakes and lumps. It forms a thin, soupy layer ice mud (engl. Grease Ice) is called. The pancake ice cream is then formed from the ice sludge. The presence of swell is important for the formation of pancake ice, otherwise a closed ice cover ( Nilas ) forms . The constant collision of the “pancakes” typically gives them a bulging edge of the clod.
Pancake ice cream can cover large areas of water within a few days. When the water freezes, a large amount of salt is released into the remaining seawater in a short time, increasing its density. The weight differences due to the concentrated salt input can cause short-lived convective plumes to form . As the warmer deep water swells and then cools, a repetitive interplay of freezing and melting begins, which causes a large part of the convection in winter.
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Individual evidence
- ↑ Meereisportal.de: Formation of sea ice: pancake ice , accessed on August 11, 2018