Antarctic history suggests ice sheet ‘danger’ threshold

Carbon dioxide levels above 600 parts per million could induce rapid melting, analysis finds

Matusevich Glacier

TIPPING POINT  A new record of the Antarctic ice sheet’s formation suggests that carbon dioxide levels in the atmosphere could soon reach a tipping point that will make the ice sheet more vulnerable to melting. That includes ice in East Antarctica, such as Matusevich Glacier (shown).

NASA Goddard Space Flight Center

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