Older sea ice is generally thicker than younger ice, and satellite data shows that Arctic ice has been thinning since 1978 as older, thicker ice is being replaced by younger, thinner ice.
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Why Older Arctic Ice Is Thicker — And Why That Distinction Now MattersAdded:
Here we're looking at the ice age, which is an indicator of thickness. Generally, older ice is thicker ice.
>> That's the voice of Dr. Walt Meyer, senior research scientist at the National Snow and Ice Data Center.
What you see in this animation is the ice pulsing out and in with the season.
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