(Immagine generata a solo scopo illustrativo)
Involves capturing CO2 and storing it in the deep ocean, which is the planet’s largest carbon sink. Methods include direct injection of liquid CO2 into the water column or onto the deep seafloor, and ocean fertilization to stimulate phytoplankton growth, which absorbs CO2 via fotosintesi. Both approaches have significant environmental concerns, primarily ocean acidification and unpredictable impacts on marine ecosystems.
I metodi includono l’iniezione diretta di CO2 liquida nella colonna d’acqua o sul fondale marino profondo e la fertilizzazione dell’oceano per stimolare la crescita del fitoplancton, che assorbe CO2 attraverso la fotosintesi. pompa involves CO2 dissolving in cold, dense surface water at high latitudes, which then sinks and circulates in the deep ocean for centuries. The biological pump involves marine organisms, primarily phytoplankton, converting CO2 into organic matter through fotosintesi. When these organisms die, a fraction of their carbon sinks to the deep ocean.
Ocean sequestration proposals aim to accelerate these processes. Direct injection involves pumping compressed CO2 to depths of 1,000-3,000 meters. At these depths, the high pressure causes the CO2 to become a liquid denser than seawater, theoretically forming stable pools on the ocean floor. However, this would create zones of extreme acidity, lethal to most marine life.
Ocean fertilization, particularly iron fertilization, involves adding micronutrients like iron to parts of the ocean to trigger massive phytoplankton blooms. The hypothesis is that this would increase the strength of the biological pump. However, experiments have shown mixed results regarding how much carbon actually reaches the deep ocean, and there are major concerns about altering the base of the marine food web and potentially creating anoxic ‘dead zones’. Due to these profound environmental risks and legal uncertainties under international treaties like the London Convention/Protocol, large-scale ocean sequestration is not currently pursued.
Sequestro del carbonio oceanico
(se la data è sconosciuta o non rilevante, ad esempio "meccanica dei fluidi", viene fornita una stima approssimativa della sua notevole comparsa)
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