Bulletin of Chinese Academy of Sciences (Chinese Version)


biological pump (BP), microbial carbon pump (MCP), carbonate carbon pump (CCP), marine carbon storage, ocean carbon negative emission geoengineering

Document Type

Technical Roadmap and Strategic Thinking of Ocean Negative Emissions Aiming Carbon Neutrality


Micro-organisms such as bacteria, archaea, and viruses are an immense invisible driving force behind the ocean carbon cycle and play a pivotal role in global climate change. Atmospheric CO2 is transformed into depositing organic components with the help of marine planktonic organisms which act as a biological pump (BP). The labile organic components are then transformed into recalcitrant organic carbon (RDOC) through the action of bacteria, archaea, and other organisms and viruses, which are called the microbial carbon pump (MCP). RDOC can be stored over thousands of years in the water column and the accompanying particulate organic matter can further settle on the seafloor and be transformed into carbonate minerals (carbonate carbon pump, CCP) by the action of benthic microorganisms for storage over a longer time period. Based on a full understanding of marine microbial processes and mechanisms, this article explains the principles and advantages of carbon sequestration and carbon storage integrated with BP, MCP, and CCP by using an eco-engineering approach to develop ocean negative emission strategies. The engineering feasibility plan, facilitated with artificial intelligence measures, provides a theoretical basis and experimental scenario that can be monitored, reported, and verified for ocean carbon storage. The implementation of this plan will provide valuable information for achieving the important goal of carbon neutrality by 2060.

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Bulletin of Chinese Academy of Sciences

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