CT 2 delivers information on how natural systems could respond to the deployment of ocean-based NETs and will assess NET climate mitigation potentials, environmental co-benefits, detrimental impacts, and the levels at which these NETs can be sustainably deployed. CT2 brings together experts of ecology and biogeochemistry, the climate system, Earth system modelling, and geochemistry.
Although not exclusively considered, the primary focus of CT 2 is on Ocean alkalinization (Ocean Alkalinity Enhancement, OAE), covering various aspects of the variety of OAE options. Such emphasis facilitates i) the design of case studies (linked to input from CT 3), with realistic deployment scenarios that can specify model applications, and ii) allows for revising model parameterizations based on experimental results. The physical, biogeochemical, and environmental constraints that partially determine the feasibility of ocean-based NETs are assessed in WP4. Process-based experimental OAE studies, as well as local/regional-scale modelling, are conducted in WP5, with a focus on the environmental and ecological impacts.