The US National Snow and Ice Data Center said Antarctica's sea ice fell to its lowest level since records began in 1979
The National Snow and Ice Data Center in the US said Antarctica's sea ice fell to 1.91 million square kilometres this week, the lowest extent since records began in 1979."With a couple more weeks likely left in the melt season, the extent is expected to drop further before reaching its annual minimum," the NSIDC said in a statement.
The Antarctic cycle undergoes significant annual variations during its summers of thawing and winters of freezing. But the high melt rate since 2016 raises concerns that a significant downward trend may be taking hold.When white sea ice, which bounces up to 90% of the Sun's energy back into space, is replaced by dark, unfrozen sea, the water absorbs a similar percentage of the Sun's heat instead.
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