Discovering Life Under Antarctica’s Ice

Drew Lohrer is the principal investigator at Science Under the Ice, a project dedicated to studying the resilience of organisms under Antarctica’s frozen ocean. Along with his team of nine scientists, Lohrer dives deep to collect data on sea organisms and deploy incubation chambers along the seafloor. The team of scientists and technicians endure life in one of the most extreme places on Earth, all in the name of discovering the effects of climate change on our marine biodiversity.

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-1 1. thundersnow commented 6 years ago

- 2 degrees celsius, should be frozen...must be supercooled? :)
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+2 2. snotraddict commented 6 years ago

#1 Salt.

"Ocean water is different from fresh water, which you find in lakes, ponds, and rivers. Ocean water has salt dissolved in it. Salt has small particles called ions that surround the water molecules and keep them from sticking together to form ice. Ice will only begin to form when the ocean water gets even colder—about 29°F.

As sea water gets colder, it gets denser. That means its molecules pack tightly together. Because it's more dense, this salty water begins to sink. That leaves less salty water on the top of the water. And this water begins to freeze. Sea ice has almost no salt in it. In fact, if you melt it, you can drink it!"
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0 3. thundersnow commented 6 years ago

#2 Thank you snotraddict for a question well answered and explained! :*