What it is
The Blue Carbon Initiative is a global program coordinated by Conservation International, IUCN, and IOC-UNESCO, focused on mitigating climate change through conservation and restoration of coastal and marine ecosystems. The initiative provides the scientific framework and policy guidance for blue carbon projects worldwide. Their research has quantified carbon storage in mangroves (570-4,217 Mg CO2e/ha in soils alone), seagrass (up to 83,000 Mg CO2e/km2), and salt marshes (~9 tCO2e/ha/yr accumulation).
Why we picked this
This is the scientific backbone of the blue carbon field. Every credible blue carbon project, policy, and methodology traces back to research coordinated or published by this initiative. Their data showing that coastal wetland degradation releases 1.02 GtCO2/yr (roughly 19% of tropical deforestation emissions) transformed how policymakers think about coastal ecosystems. If you work in climate finance, carbon markets, or coastal conservation, this is your primary reference.
Key takeaways
- Mangroves, seagrass, and salt marshes cover less than 0.2% of the ocean surface but store disproportionately large amounts of carbon, rivaling tropical forests per hectare.
- 151 countries contain at least one blue carbon ecosystem, and 71 countries contain all three (mangroves, seagrass, salt marshes), making this a truly global opportunity.
- Degradation of blue carbon ecosystems releases an estimated 1.02 GtCO2/yr, making their protection one of the highest-impact climate interventions available.