Brine rejection that drains from the newly formed ice is replaced by a weak flow of relatively fresh water, from the liquid region below it. The new water partially freezes within the pores of the ice, increasing the solidity of the ice. As sea ice ages and thickens, the initial salinity of the ice decreases due to the rejection of brine over time [Fig. 2]. While the sea ice ages, desalinization occurs to such a degree that some multiyear ice has a salinity of less than 1 PSU. This occurs in three different ways: Brine rejection occurs in the sea ice packs
British Salt In 2005, British Salt acquired New Cheshire Salt Works Limited, known as NCSW Limited. This acquisition was referred to the Competition Commission who approved the purchase. Since the purchase the NCSW site in Wincham has been closed and the site sold to Chantry Developments. The salt is extracted from strata that lie approximately 180 metres below ground. Bore holes are drilled into the strata and water is forced down to dissolve the salt. The resulting brine solution is pumped along 5 km of pipes back to the surface and direct into the Middlewich factory for purification and water evaporation to