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A comment on What is happening in the Arctic is now beyond words, so here are the pictures. Parent comment

Re:What is happening in the Arctic is now beyond words, so h... by gaius on Monday February 26, 2018 @03:36AM (#16463980)
Water expands as it freezes. That’s why pipes burst in winter.
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Re:What is happening in the Arctic is now beyond words, so h... by flukus on Monday February 26, 2018 @03:54AM (#16464033)
Water crystallization is a different effect and not relevant here. It has the same mass so it doesn't effect sea levels when it's frozen and it's not a linear effect, it won't continue to shrink as it warms.

But like everything else (to various extents) it will expand when it's warmer.

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Re:What is happening in the Arctic is now beyond words, so h... by imtringued on Monday February 26, 2018 @05:57AM (#16464463)
The maximum density of water is at 4 degrees. If you heat it above that it starts expanding quickly. If you freeze it below that it starts expanding slowly.
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