150,000 square miles – roughly the size of Montana is not freezing like it normally would in Antarctica

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A large portion of Antarctic sea ice hasn't refrozen. Here's why it matters

 

 Graphics based on satellite imagery from the University of Colorado Boulder's National Snow and Ice Data Center taken on Sunday show a large portion of sea ice measuring approximately 150,000 square miles – roughly the size of Montana – is not included in what is typically already frozen at this time of year, which is mid-winter in the Southern Hemisphere, experts told ABC News.