tipping point

Climatologists fear that a 1.5°C temperature rise could trigger irreversible tipping points in the Earth system.气候学家担心，1.5°C的温度上升可能会触发地球系统中不可逆转的临界点。

The melting of Arctic sea ice represents a critical tipping point with global climatic consequences.北极海冰的融化代表了一个具有全球气候后果的关键临界点。