Unlocking Climate Solutions: How ‘Blue Carbon’ Ecosystems Can Combat Climate Change

Scientists and policymakers gathered at the 2025 Hainan Blue Carbon Forum to discuss how to harness the ocean’s potential in fighting climate change. They highlighted “blue carbon” ecosystems, like mangroves and seagrass meadows, as vital carbon sinks that can help absorb carbon dioxide from the atmosphere.

One key point raised during the event was the need for global standards to measure and trade blue carbon credits. This would allow countries to include these credits in their climate strategies effectively. Zhang Zhifeng from China’s Department of Marine Ecology shared the country’s plan to include blue carbon efforts in its next Five-Year Plan, aiming to enhance ecosystem protection and develop advanced carbon capture technologies.

The oceans are the largest carbon sink, absorbing about 30% of human-caused CO2 emissions each year. Over the last 200 years, oceans have absorbed more than 40% of the carbon released from fossil fuels. This emphasizes the importance of protecting and restoring coastal ecosystems.

Bao Daming, from the International Mangrove Center, pointed out that mangroves are particularly effective at storing carbon—up to five times more than regular forests. He called them “the coast guards and lungs of the ocean” because of their role in carbon sequestration and their ability to protect shorelines and support marine biodiversity.

In Hainan, nearly 3,000 hectares of mangroves have been restored and are monitored for their carbon storage capabilities. Recent data shows that Hainan’s mangroves store an impressive 274 metric tons of carbon per hectare, the highest in China. This puts Hainan at the forefront of blue carbon research, where they are also developing new standards for carbon accounting.

Wang Aimin, a chief scientist in Hainan, spoke about the role of marine ranches in carbon sequestration. Bivalves living on coral reefs help filter water and also contribute to capturing carbon. This innovative approach strengthens local blue carbon research.

Nina Buchmann, a professor at ETH Zurich, added that balancing emissions and carbon storage in climate models is crucial. Understanding these dynamics can help shape more effective climate strategies around the world.

In summary, the synergy between policy, science, and community efforts can make a significant impact in utilizing blue carbon to combat climate change. As we look ahead, international cooperation and standardization will be key to maximizing this potential.

Source link