UPDATE: A new report just released at COP30 warns of significant risks in scaling up ocean carbon sinks to combat climate change. Experts from the Norwegian University of Science and Technology stress that current technologies are too uncertain and could lead to unforeseen environmental consequences.
During a critical session of the UN climate conference taking place in Brazil, researchers revealed that while the ocean has potential to absorb carbon dioxide, immediate efforts must focus on proven emission reduction strategies. “We know how to cut emissions, and we have lots of methods that work,” stated Helene Muri, a senior researcher involved in the report.
The findings underscore the urgency as the planet inches closer to exceeding the 1.5°C threshold. UN General Secretary António Guterres emphasized this risk in his opening remarks, asserting that a temporary overshoot beyond this limit is now “inevitable” unless swift action is taken.
The report outlines that marine carbon dioxide removal methods depend on the ocean’s natural capacity to absorb carbon through biological and chemical processes. Strategies vary from enhancing plankton growth to direct carbon capture technologies, yet many remain in the early development stages. The key question: Are these methods ready for large-scale application? The consensus is clear—strong regulatory safeguards are necessary before any large-scale implementation.
“Safeguarding the oceans for a common good is vital,” Muri warned. “The oceans can be part of the climate solution, but we need to strengthen the way we safeguard them.”
With 42.4 gigatons of CO2 emissions recorded in 2024, immediate action is essential. The report argues that focusing on carbon removal from the ocean may be necessary for sectors difficult to decarbonize, such as aviation and shipping, but this should not distract from the immediate need to cut emissions.
Looking ahead, the call to action is clear: countries must prioritize reducing emissions while conducting rigorous evaluations of marine carbon removal’s potential impacts. The report highlights the necessity of developing reliable monitoring and verification systems to ensure these methods do not create additional environmental issues.
As the world grapples with the ongoing climate crisis, this urgent report serves as a pivotal reminder that while innovative solutions are being explored, proven methods must take precedence. The future of our climate depends on what action is taken today.
Stay tuned for further updates as this story develops.
