(www.MaritimeCyprus.com) The Ocean already absorbs around a quarter of global CO₂ emissions, making it a central player in the climate system. As the EU and IMO intensify their decarbonisation trajectories, interest is growing in Marine Carbon Dioxide Removal (mCDR)—a range of emerging techniques designed to enhance the Ocean’s natural ability to capture and store CO₂. These methods include Ocean Alkalinity Enhancement, biomass cultivation and sinking, direct Ocean carbon removal, and blue-carbon ecosystem restoration.
However, the European Marine Board’s latest Future Science Brief No. 13 stresses a critical point: none of these methods can be scaled responsibly without strong Monitoring, Reporting and Verification (MRV). For shipowners, investors, and regulators, this issue is becoming highly relevant as maritime activities may one day support, transport, or interact with mCDR operations.
What Makes MRV Essential?
Because mCDR methods alter ecological and chemical processes in the marine environment, the climate benefit must be proven, quantifiable, and durable. MRV frameworks must be able to:
Measure net COâ‚‚ removal, including any COâ‚‚ re-released later in the cycle.
Capture emissions from ships and equipment used to deploy mCDR activities (Life Cycle Assessment).
Detect unintended impacts, such as changes in water chemistry, biodiversity, methane or nitrous oxide production.
Demonstrate additionality—that removals would not have occurred without the intervention.
Provide transparent reporting to regulators, carbon markets and coastal states.
The European Marine Board highlights that current MRV protocols are fragmented, inconsistent, and not yet fit for large-scale deployment. A global, harmonised system is needed before any mCDR method can credibly support climate targets.
Why Shipowners Should Pay Attention
The shipping industry is uniquely positioned at the intersection of ocean operations, climate policy and new marine technologies. mCDR developments may soon affect shipowners in several ways:
Future chartering opportunities, as specialised vessels may be needed for material dispersion, monitoring, or biomass transport.
Regulatory implications, as flag-state, EU and international frameworks evolve to govern mCDR activities at sea.
Coastal-state permissions and environmental impact assessments for operations near ports or EEZs.
Carbon markets, where verified mCDR units could one day interact with EU ETS maritime obligations or voluntary ESG commitments.
While mCDR is not a substitute for emissions reduction, it is increasingly viewed as a complementary tool for long-term climate goals—and shipping will inevitably be part of that system.
The Bottom Line
Marine carbon removal holds potential, but science-based MRV must come first. The European Marine Board calls for standardised protocols, better ocean observation systems, improved modelling, clearer governance and transparent data-sharing. For shipowners, understanding this landscape early will be essential as maritime decarbonisation becomes ever more interconnected with emerging ocean-based climate solutions.
For more info, you can download below the paper Monitoring, Reporting and Verification for Marine Carbon Dioxide Removal:
Source: European Marine Board
