And it turns out that you can't grow sea ice over oceans that don't have a halocline.

事实证明，你不能在没有盐跃的海洋上生长海冰。

So the fact that these layers don't mix and disrupt this halocline is super important to the global climate.

此，不会混合和破坏种盐跃一事实对全球非常重要。

Usually cold water is denser and falls to the bottom, but in the Arctic, there's a strong halocline where saltier, denser water is at the bottom and freshwater is at the top.

通常冷水密度更大， 会落到底部，但在北极，有一个强烈的盐跃，底部是咸度更高、密度更大的水， 而顶部是淡水。