Marine Carbon Sequestration
Marine carbon sequestration refers to the process by which oceans and seas absorb and store carbon dioxide from the atmosphere. Through physical, chemical, and biological mechanisms—such as photosynthesis by phytoplankton, the formation of carbonate shells, and the sinking of organic matter—oceans act as a major carbon sink. This natural process helps regulate Earth’s climate by reducing greenhouse gas concentrations and mitigating the impacts of global warming.
Marine Carbon Sequestration
Marine carbon sequestration refers to the process by which oceans and seas absorb and store carbon dioxide from the atmosphere. Through physical, chemical, and biological mechanisms—such as photosynthesis by phytoplankton, the formation of carbonate shells, and the sinking of organic matter—oceans act as a major carbon sink. This natural process helps regulate Earth’s climate by reducing greenhouse gas concentrations and mitigating the impacts of global warming.
💡 Key Takeaways
- How oceans remove CO2 from the atmosphere through physical dissolution and biological processes.
- What blue carbon ecosystems are and how mangroves, seagrasses, and salt marshes store carbon in biomass and sediments.
- How marine sediments can lock away carbon for long times and what factors influence storage (sedimentation rate, oxygen levels, disturbances).
- The limits and considerations of marine carbon sequestration as a climate solution, including reversibility, leakage risks, and time horizons.
❓ Frequently Asked Questions
What is marine carbon sequestration?
The ocean absorbs and stores carbon dioxide over long timescales through biological, chemical, and physical processes, helping regulate atmospheric CO2.
What is blue carbon and which ecosystems store it?
Blue carbon is carbon captured and stored by coastal and marine ecosystems—such as mangroves, salt marshes, and seagrasses—primarily in soils and sediments.
What is the biological carbon pump?
A process where phytoplankton convert CO2 into organic matter; when this matter sinks or is consumed, carbon is transferred from surface waters to deep-ocean sediments.
Where is ocean carbon stored long-term?
In deep-sea sediments and in carbonate minerals formed from dissolved inorganic carbon and organic remains.
How does ocean acidification affect marine carbon sequestration?
It alters carbonate chemistry, can reduce calcifying organisms, and may decrease the long-term burial of carbon in sediments.