Antarctic ice‐sheet melting provides negative feedbacks on future climate warming

We show by using a three‐dimensional climate model, which includes a comprehensive representation of polar ice sheets, that on centennial to millennial time scales Antarctic Ice Sheet (AIS) can melt and moderate warming in the Southern Hemisphere, by up to 10°C regionally, in a 4 × CO 2 scenario. This behaviour stems from the formation of a cold halocline in the Southern Ocean, which limits sea‐ice cover retreat under global warming and...