Sea ice in Antarctica.Ice that survives the summer melt season can last for years.For ice to thicken
Sea ice in Antarctica.Ice that survives the summer melt season can last for years.For ice to thicken, the ocean must lose heat to the atmosphere. Butthe ice also insulates the ocean, so heat loss gradually becomes moredifficult. Eventually, the ice becomes too thick for more heat toescape (about 3 – 4 metres). Further thickening is only possiblethrough collisions and ridge building.Ice that survives for years loses more and more salt, and hardensmore each year. First-year ice, on the other hand, is thinner andsaltier, and is more prone to melting during the summer. -- source link
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