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Kosmos2018

An international team of 50 marine scientists are participating in a study which aims to study the feasibility, effectiveness, associated risks and potential side effects of ocean artificial upwelling in fertilizing ocean productivity and enhancing energy transfer to higher trophic levels with the potential of raising fish production. Biologists, chemists, biogeochemists and physical oceanographers cooperate closely in the field experiment with KOSMOS mesocosms which will be conducted at Gran Canaria between October and December 2018.

In the framework of the project Ocean artUp (ERC-AdG project, https://ocean-artup.eu/), the researches plan to organize a mesocosm study in Gando Bay. Ocean artUp will further investigate the impacts of artificial upwelling on biogeochemical cycling, including carbon export potential, and air-sea gas exchange of climate relevant gases. This will be addressed through a combination of small-scale batch experiments, long-term in situ mesocosm experiments, field observations in cyclonic eddies, ecosystem biogeochemical modelling of the relevant processes, the technical development, construction and testing of a free-drifting pump system, and its application in an artificial upwelling pilot study.

For this experiment, it is planned to deploy nine mesocosm bags in Gando Bay and simulate an artificial upwelling of different intensities (varying the added volume of deep water). During 10 weeks approximately, the plankton community inside the mesocosms and the biogeochemically relevant pools and fluxes of carbon, nitrogen, phosphorus and silica will be closely monitored daily