Using Geothermal Energy to Mix the Ocean

There are environmental advantages in mixing the upper layers of the ocean by
bringing deep nutrients into the light where photosynthesis by phytoplankton, the
base of a very important food chain, can occur.
These advantages include augmenting the volume and diversity of ocean fish stocks and
sequestration of atmospheric CO2 into the deep ocean.
The energy to carry out oceanic mixing is available in the form of superheated water from
hydrothermal vents (HTVs) on the ocean floor.
A heat engine has been devised in the form of a large scale bubble pump, a Nutrient
Megapump, which converts HTV superheated water into the mechanical energy needed to bring
nutrient-rich water to the surface.
The cost of construction and deployment of Nutrient Megapumps can be justified economically in
terms of the commercial fish stocks created and carbon credits traded.
There are both sufficient nutrients and sufficient energy available to allow such schemes to
be developed for decades to come, enough even to undo recent increases in atmospheric CO2.

Overview Thin Pipe Yield Megapump Fishery CO2
Costs Rivals Side Effects Conclusions References Home

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