Theories about how carbon is sequestered in seawater could influence the development of capture and storage systems.
Credit: Xiaomeng Wang
For example, our laboratory experiments found that microorganisms tend to generate less RDOC in water that has large quantities of chemicals and minerals, such as those from chemical fertilizer or sewage. Specifically, fertilizer runoff in streams and rivers encourages bacterial respiration, which increases the amount of carbon dioxide released from the water, and reduces the amount stored as RDOC.
Working out exactly how these processes influence each other is the next focus of our research, and understanding their interactions will help us to design the field tests.At this stage, the process through which marine microorganisms turn dissolved organic carbon into RDOC is still a black box. And to turn theoretical research into real-world applications, we need policy support from local authorities, especially from the environment- and marine-related departments that can grant permission for experiments in nature, especially on a large scale.The field of ocean carbon storage has received a lot of attention, and funding opportunities have been increasing.
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