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Home Compare the extension of older sea ice in the Arctic in September 1984 and September 2016. The older ice is thicker and more resistant to melt than new ice, so it protects the sea ice cap during warm summers. In September 1984, there were 1.86 million square kilometers of old ice (5 years or older) left throughout the Arctic sea ice cap during its yearly minimum extent; in September 2016, there were only 110,000 square kilometers of older sea ice left. (NASA’S Scientific Visualization Studio) Compare the extension of older sea ice in the Arctic in September 1984 and September 2016. The older ice is thicker and more resistant to melt than new ice, so it protects the sea ice cap during warm summers. In September 1984, there were 1.86 million square kilometers of old ice (5 years or older) left throughout the Arctic sea ice cap during its yearly minimum extent; in September 2016, there were only 110,000 square kilometers of older sea ice left. (NASA'S Scientific Visualization Studio)

Compare the extension of older sea ice in the Arctic in September 1984 and September 2016. The older ice is thicker and more resistant to melt than new ice, so it protects the sea ice cap during warm summers. In September 1984, there were 1.86 million square kilometers of old ice (5 years or older) left throughout the Arctic sea ice cap during its yearly minimum extent; in September 2016, there were only 110,000 square kilometers of older sea ice left. (NASA’S Scientific Visualization Studio)

Compare the extension of older sea ice in the Arctic in September 1984 and September 2016. The older ice is thicker and more resistant to melt than new ice, so it protects the sea ice cap during warm summers. In September 1984, there were 1.86 million square kilometers of old ice (5 years or older) left throughout the Arctic sea ice cap during its yearly minimum extent; in September 2016, there were only 110,000 square kilometers of older sea ice left. (NASA'S Scientific Visualization Studio)

Compare the extension of older sea ice in the Arctic in September 1984 and September 2016. The older ice is thicker and more resistant to melt than new ice, so it protects the sea ice cap during warm summers. In September 1984, there were 1.86 million square kilometers of old ice (5 years or older) left throughout the Arctic sea ice cap during its yearly minimum extent; in September 2016, there were only 110,000 square kilometers of older sea ice left. (NASA’S Scientific Visualization Studio)

Compare the extension of older sea ice in the Arctic in September 1984 and September 2016. The older ice is thicker and more resistant to melt than new ice, so it protects the sea ice cap during warm summers. In September 1984, there were 1.86 million square kilometers of old ice (5 years or older) left throughout the Arctic sea ice cap during its yearly minimum extent; in September 2016, there were only 110,000 square kilometers of older sea ice left. (NASA’S Scientific Visualization Studio)