Assessing ocean alkalinity for carbon sequestration

Carbon dioxide hydrate particles for ocean carbon sequestration

This paper presents strategies for producing negatively buoyant CO2 hydrate composite particles for ocean carbon sequestration. Our study is based on recent field observations showing that a continuous-jet hydrate reactor located at an ocean depth of ~1500 m produced curved negatively buoyant cylindrical particles with diameters ~ 2.5 cm and lengths up to ~ 1 m. Accordingly we performed new lab...

Assessing the effectiveness of direct injection for ocean carbon sequestration under the influence of climate change

[1] This paper studies the effect of climate change on simulated efficiency of carbon injection at different locations and ocean depths using an Earth system model of intermediate complexity, ISAM-2.5D. Following the OCMIP carbon sequestration protocol, we carried out a series of carbon injection simulations. The ISAM results show that warming over the next 500 years under the IPCC S650 and WRE...

Ocean Carbon Sequestration by Direct Injection

Open Ocean Iron Fertilization for Scientific Study and Carbon Sequestration

The trace element iron has been recently shown to play a critical role in nutrient utilization, phytoplankton growth and therefore the uptake of carbon dioxide from the surface waters of the global ocean. Carbon fixation in the surface waters, via phytoplankton growth, shifts the ocean/atmosphere exchange equilibrium for carbon dioxide. As a result, levels of atmospheric carbon dioxide (a green...

Differing methods of accounting ocean carbon sequestration efficiency

[1] Presently, much of CO2 fossil-fuel emissions are removed from the atmosphere through natural ocean uptake of CO2. Many schemes have now been proposed by which the accumulation of anthropogenic CO2 in the atmosphere could be slowed with intentional further storage of CO2 in the ocean. Our review of the literature indicates inconsistency in whether ambient ocean carbon uptake is included when...