Sea ice in 2024 – the new abnormal
Arctic sea ice has been undergoing a transformation over the last 45+ years toward an eventual ice-free Arctic Ocean. Sea ice in the Arctic is much less extensive now, particularly during the late summer when the annual minimum ice cover is reached. It is also much younger on average, much of the ice just 2 or 3 years old, relative to the 1980s and early 1990s when a large portion of the ice was more than 5 years old. Older ice is thicker and more durable; but much of that ice was lost in a series of warm summers beginning in the late 1990s.
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