Finally, ice in the Arctic has become a collector of contaminants that did not originate in the region. Through the global distillation effect, pollutants from industrialized areas in the lower latitudes have concentrated in the Arctic. As explained above, sea ice is a very important and interactive climate parameter. It has not been modeled responsively to the role it plays, but rather simply as a deforming slab, in most cases. There is, however, a simple and effective way to model sea ice, which was suggested by Zubov in 1943 and is widely used in operational sea ice forecasting.
Elastic materials bounce back.
If a material is viscous, its density increases but it doesn't come back if the pressure on it is released. Plastic materials break under sufficient pressure. Sea ice has been modeled mainly as a slab, and either as an elastic plastic material, a viscous plastic material or an elastic viscous material. Sea ice has not been modeled effectively in GCMs. The earliest attempts to account for sea ice in GCMs involved simply treating it as a swamp - a thick layer that doesn't do anything.