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
Brine mining depths of 6,000 to 10,000 feet, and contains about 300ppm iodine. All the world's bromine production is derived from brine. The majority is recovered from Dead Sea brine at plants in Israel and Jordan, where bromine is a byproduct of potash recovery. Plants in the United States ("see: Bromine production in the United States"), China, Turkmenistan, and Ukraine, recover bromine from subsurface brines. In India and Japan, bromine is recovered as a byproduct of sea salt production. The first commercial production of magnesium from seawater was recorded in 1923, when some solar salt plants around San Francisco Bay, California, extracted