As the ice sheet loses height, its surface encounters warmer air, amplifying melt and potentially committing Greenland to long-term disintegration.
System snapshot
- Assessment
- High confidence
- Warming signal
- ~1.5°C best estimate; wide uncertainty
- Transition
- Centuries to millennia
Why it mattersUp to roughly 7 metres of eventual global mean sea-level rise if the ice sheet were lost.
iCrossing a threshold would commit long-term change; it would not make the ice sheet disappear suddenly.