All articles tagged with #ocean deoxygenation
Ancient volcanic activity 183 million years ago caused widespread ocean anoxia, a process that is now being mirrored by modern human-induced CO2 emissions, which are reducing ocean oxygen levels and threatening marine life. Scientists use geochemical methods to study past events, highlighting the long-lasting impact of deoxygenation and emphasizing the urgent need to reduce emissions to prevent similar catastrophic outcomes today.
A study warns that some marine carbon dioxide removal methods, especially biological approaches like ocean fertilization and macroalgae farming, could worsen ocean oxygen depletion, potentially harming marine ecosystems, while geochemical methods may be safer alternatives. Careful assessment of these techniques is essential to avoid unintended environmental consequences.
A recent study warns that some marine carbon dioxide removal methods, especially biological ones like ocean fertilization and macroalgae sinking, could significantly worsen ocean deoxygenation, potentially causing oxygen loss 4 to 40 times greater than current levels, highlighting the need for careful assessment and monitoring of these approaches.