The idea (see ref. 1) is that vertical pipes could be used to pump up nutrient-rich water from deeper in the ocean. Phytoplankton growth in most parts of the ocean is limited by scarcity of nutrients. Supplying more nutrients is likely to stimulate more phytoplankton growth. The phytoplankton will take up corresponding amounts of carbon as they synthesise new cells. The new growth will therefore consume carbon and lead to CO2 entering the ocean from the atmosphere, in order to replace the carbon lost into new algal cells.
- J.E. Lovelock & C.G. Rapley (2007) Ocean pipes could help the Earth to cure itself. Nature, 449: 403 (27 September 2007).
- J.G. Shepherd, D. Iglesias-Rodriguez & A. Yool (2007) Geo-engineering might cause, not cure, problems. Nature 449: 781 (18 October 2007).
- Geoengineering, Wikipedia
- Description of biogeochemistry, Wikipedia
- Description of primary production, Wikipedia
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