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
New Cheshire Salt Works Salt Works having closed in the early 1970s. Naturally occurring underground brine from the Wincham brinefield was pumped to the surface via a borehole. Such natural or wild brine pumping differs from controlled brine pumping, where water is pumped underground into rock to dissolve rock salt deposits. The process has historically been associated with subsidence, which has been a major problem in the Northwich area. The brine was purified by treatment with sodium carbonate and lime, and the salt extracted using a closed-pan partial vacuum evaporation method. The technique was adapted from the sugar industry, and had first been applied