Changing resilience of oceans to climate change

ScienceDaily | Jan 15, 2021 at 7:32 PM
  • Scientists used geological samples to estimate ocean oxygen during a period of global warming 56 million years ago — and found “limited expansion” of seafloor anoxia (absence of oxygen).
  • Conditions are different today to the PETM — today’s rate of carbon emissions is much faster, and we are adding nutrient pollution to the oceans — both of which could drive more rapid and expansive oxygen loss.
  • Computer simulations based on the results suggest a maximum ten-fold increase in the area of seafloor devoid of oxygen — taking the total to no more than 2% of the global seafloor.