Extreme global warming could see major ocean life extinction
How badly will ocean animals be hit as Earth warms? A computer model based on the oxygen requirements of marine organisms may provide an answer.
Our oceans already contain about 2 per cent less oxygen than 50 years ago, because the gas is less soluble in warmer water. Many organisms are therefore moving polewards to cooler regions. As the oceans continue to warm, some will be left with nowhere to go, with polar species being hit hardest.
The model suggests marine extinctions will rise gradually alongside ocean warming, passing 10 per cent once around 6°C of warming on average across the seas is reached. After 8°C, the percentage will increase more rapidly, passing 40 per cent at around 14°C of warming.