What is Antarctic sea ice?

Antarctic sea ice is like a giant, floating ice blanket that covers parts of the Southern Ocean around Antarctica.

Imagine you're playing in a big puddle outside on a cold day, when it gets really chilly, the water turns into ice, and you can skate or slide on it. That's kind of what happens with Antarctic sea ice, but way bigger! Every winter, the ocean around Antarctica freezes, creating a huge sheet of ice that spreads out like a frozen lake.

In summer, when it gets warmer, some of this ice melts and floats away, like ice cubes in a glass of water. But in winter, new ice forms, growing the blanket again, just like how snow piles up on your driveway after a big snowstorm.

Sometimes, this ice blanket can get really big, bigger than all of Europe! And sometimes it shrinks, like when you melt an ice cube with a warm drink. Scientists watch this happen to understand how cold and warm the Earth is getting.